Updated on 2021/12/25

写真a

 
SUZUKI Takayoshi
 
Organization
Research Institute for Interdisciplinary Science Professor
Position
Professor
External link

Degree

  • 博士(理学) ( 名古屋大学 )

Research Interests

  • Coordination Chemistry

  • 錯体化学

Research Areas

  • Nanotechnology/Materials / Inorganic/coordination chemistry

Education

  • Nagoya University   理学研究科   化学専攻

    - 1992

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    Country: Japan

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  • Nagoya University    

    - 1992

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  • Nagoya University   理学部   化学科

    - 1987

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    Country: Japan

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  • Nagoya University    

    - 1987

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Research History

  • - Professor,Graduate School of Natural Science and Technology,Okayama University

    2015

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  • - 岡山大学自然科学研究科 教授

    2015

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  • 岡山大学自然科学研究科 准教授

    2008 - 2015

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  • Associate Professor,Graduate School of Natural Science and Technology,Okayama University

    2008 - 2015

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  • Osaka University

    2007 - 2008

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  • Assistant Professor

    2007 - 2008

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  • Visiting Scholar,University of Washigton

    2002 - 2003

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  • ワシントン大学 文部科学省在外研究員

    2002 - 2003

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  • Osaka University

    1995 - 2007

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  • Research Associate

    1995 - 2007

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  • 岡崎国立共同研究機構分子科学研究所 助手

    1993 - 1996

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  • Research Associate

    1993 - 1996

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  • コペンハーゲン大学 文部省交換留学生

    1988 - 1989

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  • Exchange student,University of Copenhagen

    1988 - 1989

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Professional Memberships

  • Japan Society of Coordination Chemistry

    2002

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  • American Chemical Society

    1996.1

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  • Chemical Society of Japan

    1987

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Committee Memberships

  • 錯体化学会   理事  

    2009 - 2011   

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    Committee type:Academic society

    錯体化学会

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Papers

  • Crystal and molecular structures of dichloridopalladium(II) containing 2-methyl- or 2-phenyl-8-(diphenyphosphanyl)quinoline

    Masatoshi Mori, Atsushi Namioka, Takayoshi Suzuki

    Acta Crystallographica Section E Crystallographic Communications   77 ( 1 )   52 - 57   2021.1

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    Publishing type:Research paper (scientific journal)   Publisher:International Union of Crystallography ({IUCr})  

    DOI: 10.1107/S2056989020016096

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  • Zero-field slow relaxation of magnetization in cobalt(ii) single-ion magnets: suppression of quantum tunneling of magnetization by tailoring the intermolecular magnetic coupling Reviewed

    Ryoji Mitsuhashi, Satoshi Hosoya, Takayoshi Suzuki, Yukinari Sunatsuki, Hiroshi Sakiyama, Masahiro Mikuriya

    RSC Advances   10   43472 - 43479   2020.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/d0ra08286d

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  • Sterically Demanding 8-(Diphenylphosphino)quinoline Complexes of Group 10 Metal(II): Synthesis, Crystal Structures, and Properties in Solution Reviewed

    Masatoshi Mori, Yukinari Sunatsuki, Takayoshi Suzuki

    Inorganic Chemistry   59 ( 24 )   18255 - 18240   2020.12

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society ({ACS})  

    DOI: 10.1021/acs.inorgchem.0c02706

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  • Comparison of molecular structures of cis-bis[8-(dimethylphosphanyl)quinoline]nickel(II) and -platinum(II) complex cations Reviewed

    Masatoshi Mori, Takayoshi Suzuki

    Acta Crystallographica Section E Crystallographic Communications   76 ( 12 )   1813 - 1817   2020.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:International Union of Crystallography ({IUCr})  

    DOI: 10.1107/S2056989020014437

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  • Mixed-ligand platinum(II) complexes containing 2-(2’-pyridyl)phenyl and 8-quinolylphosphines: synthesis and molecular structures in the crystals and in solution Reviewed

    Mori, M.; Suzuki, T.

    Inorganica Chimica Acta   512   119862   2020.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ica.2020.119862

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  • Concomitant emergence of circularly polarized luminescence and single-molecule magnet behavior in chiral-at-metal Dy complex Reviewed

    Bahjat El Rez, Jiawen Liu, Virginie Béreau, Carine Duhayon, Yuki Horino, Takayoshi Suzuki, Laurent Coolen, Jean-Pascal Sutter

    Inorganic Chemistry Frontiers   7   4527 - 4534   2020.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry ({RSC})  

    DOI: 10.1039/d0qi00919a

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  • A specific formation of an iridium(III) hydrido complex bearing 8-(diphenylphosphino)quinoline Reviewed

    Ariyoshi, K., Kotera, M., Namioka, A., Suzuki, T.

    Polyhedron, Journal of Inorganic and Nuclear Chemistry   179   114401   2020.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.poly.2020.114401

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  • Synthesis and magnetic properties of tetrahedral tetranuclear iron(II) complexes with bis(bidentate)-type Schiff bases containing imidazole groups Reviewed

    Tanaka, T., Sunatsuki, Y., Suzuki, T.

    Inorganica Chimica Acta   502   119373   2020.3

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    DOI: 10.1016/j.ica.2019.119373

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  • Iron(II) Complexes Having Dinuclear Mesocate or Octanuclear Bicapped Trigonal Prism Structures Dependent on the Rigidity of Bis(bidentate) Schiff Base Ligands Containing Imidazole Groups Reviewed

    Tsubasa Tanaka, Yukinari Sunatsuki, Takayoshi Suzuki

    Bull. Chem. Soc. Jon.   93 ( 3 )   427 - 437   2020.3

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    DOI: 10.1246/bcsj.20190360

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  • Transition-metal(ii) complexes with a tripodal hexadentate ligand, 1,1,1-tris[2-aza-3-(imidazol-4-yl)prop-2-enyl]ethane, exhibiting incomplete total or absolute spontaneous resolution Reviewed

    Misaki Matsushima, Koki Wada, Yuki Horino, Kazuma Takahara, Yukinari Sunatsuki, Takayoshi Suzuki

    CrystEngComm   22 ( 3 )   458 - 466   2020.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry ({RSC})  

    DOI: 10.1039/c9ce01864f

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  • Dinuclear lanthanoid(III) dithiocarbamato complexes bridged by (E)-N-benzylidenepicolinohydrazonate: Syntheses, crystal structures and spectroscopic properties Reviewed

    Abdallah Yakubu, Takayoshi Suzuki, Masakazu Kita

    INORGANICA CHIMICA ACTA   498   119124   2019.12

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE SA  

    (E)-N-Benzylidenepicolinohydrazide (Hbphz) was used to synthesize a series of hydrazonato-bridged homodinuclear Ln(2)(III) dithiocarbamato (RR'dtc(-)) complexes of the form [{Ln(RR' dtc)(2)}(2)(mu-bphz)(2)] {Ln= La, Pr, Nd, Sm or Eu; RR'= dimethyl-(Me-2) or pyrrolidine-(pyr)}. X-ray crystallographic studies revealed that these complexes possessed a common head-to-tail type dinuclear structural motif in which two hydrazonato ligands bridged two Ln(III) centers in the mu- 1 kappa N-2(py),O:2 kappa O-2,N(imine) mode and two RR'dtc ligands coordinated to each Ln(III) center. Interestingly, while the Sm-III and Eu-III complexes crystallized as simple 8:8-coordinate dinuclear molecules, the lighter Ln(III) (i.e. La-III, Pr-III and Nd-III) complexes afforded in some cases 9:9-coordinate molecules, where the ninth coordination site was occupied by a solvent ethanol or methanol molecule. Even for the lighter Ln(III) complexes, the complexes were solved in dichloromethane or chloroform as the 8:8-coordinate dimer, as revealed by H-1 NMR spectroscopy. In the UV-visible absorption and magnetic circular dichroism (MCD) spectra of the complexes, similar spectral patterns for ligand-centered and Laporte forbidden f-f transitions were observed. The MCD spectral studies demonstrated the characteristic magneto-optical behavior of the complexes.

    DOI: 10.1016/j.ica.2019.119124

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  • Homodinuclear lanthanoid(III) dithiocarbamato complexes bridged by 2,2′-bipyrimidine: Syntheses, structures and spectroscopic properties Reviewed

    Abdallah Yakubu, Takayoshi Suzuki, Masakazu Kita

    Polyhedron   171   515 - 522   2019.10

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    Four new homodinuclear lanthanoid(III) dithiocarbamato (RR'dtc(-)) complexes bridged by 2,2'-bipyrimidine (bpm) of the form [{Ln(RR'dtc)(3)}(2)(mu-bpm)] {Ln = Nd or Eu; RR' = dimethyl- (Me-2) or pyrrolidine(pyr)} were prepared and their crystal structures and spectroscopic properties were characterized. The crystallographic studies revealed that all of the complexes possess a similar structural motif with an 8:8-coordination geometry, in which the bpm ligand bridges two Ln(III) centers in the kappa N-2(1,1') : kappa N-2(3,3') mode and three RR'dtc(-) ligands coordinate to each Ln(III) center. The complexes exhibit weak but relatively sharp f-f transition bands in the absorption and magnetic circular dichroism (MCD) spectra recorded in the visible region. The MCD spectral studies demonstrated the magneto-optical behavior of the complexes. The spectral features of the dithiocarbamato complexes were distinctly different from those of their beta-diketonato analogues, suggesting the coordination environment around the Ln(III) center influences the electronic structure and spectroscopic symmetry of the complexes in solution. (C) 2019 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.poly.2019.07.046

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  • Tetra- and dinuclear manganese complexes of xanthene-bridged O,N,O-Schiff bases with 3-hydroxypropyl or 2-hydroxybenzyl groups: ligand substitution at a triply bridging site Reviewed

    Rina Ogawa, Takayoshi Suzuki, Masakazu Hirotsu, Noriyuki Nishi, Yuu Shimizu, Yukinari Sunatsuki, Yoshio Teki, Isamu Kinoshita

    Dalton Transactions   48 ( 36 )   13622 - 13629   2019.9

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    DOI: 10.1039/c9dt03007g

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  • Spin, Valence, and Structural Isomerism in the S3 State of the Oxygen-Evolving Complex of Photosystem II as a Manifestation of Multimetallic Cooperativity. Reviewed International journal

    Hiroshi Isobe, Mitsuo Shoji, Takayoshi Suzuki, Jian-Ren Shen, Kizashi Yamaguchi

    Journal of chemical theory and computation   15 ( 4 )   2375 - 2391   2019.4

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    Photosynthetic water oxidation is catalyzed by a Mn4CaO5-cluster in photosystem II through an S-state cycle. Understanding the roles of heterogeneity in each S-state, as identified recently by the EPR spectroscopy, is very important to gain a complete description of the catalytic mechanism. We performed herein hybrid DFT calculations within the broken-symmetry formalism and associated analyses of Heisenberg spin models to study the electronic and spin structures of various isomeric structural motifs (hydroxo-oxo, oxyl-oxo, peroxo, and superoxo species) in the S3 state. Our extensive study reveals several factors that affect the spin ground state: (1) (formal) Mn oxidation state; (2) metal-ligand covalency; (3) coordination geometry; and (4) structural change of the Mn cluster induced by alternations in Mn···Mn distances. Some combination of these effects could selectively stabilize/destabilize some spin states. We found that the high spin state ( Stotal = 6) of the oxyl-oxo species can be causative for catalytic function, which manifests through mixing of the metal-ligand character in magnetic orbitals at relatively short O5···O6 distances (<2.0 Å) and long MnA···O5 distances (>2.0 Å). These results will serve as a basis to conceptually identify and rationalize the physicochemical synergisms that can be evoked by the unique "distorted chair" topology of the cluster through cooperative Jahn-Teller effects on multimetallic centers.

    DOI: 10.1021/acs.jctc.8b01055

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  • Syntheses and crystal structures of neodymium(III) and europium(III) complexes bearing dimethyl-, pyrrolidine-, or S-prolinol- dithiocarbamato ligands and their natural and magnetic circular dichroism spectra Reviewed

    Yakubu, A., Suzuki, T., Kita, M.

    Inorganica Chimica Acta   484   394 - 401   2019.1

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    A series of Nd-III and Eu-III complexes containing achiral or chiral dithiocarbamato (dtc) ligands, [Ln(Xdtc)(3)(NN)] {Ln = Nd or Eu; X = dimethyl- (Me-2), pyrrolidine- (pyr), or (S)-prolinol- (S-proOH); NN = 1,10-phenanthroline (phen) or 2,2'-bipyridine (bpy)}, were prepared and their crystal structures and spectroscopic properties, in particular the natural circular dichroism (CD) and magnetic circular dichroism (MCD), were investigated. The crystal structures of the complexes analyzed by the X-ray diffraction method showed an 8-coordinate geometry around the Ln III center with comparable structural parameters to one another and to the related complexes reported previously. These complexes exhibited similar spectral patterns in their absorption, natural CD and MCD spectra in solution. Weak but characteristic sharp f-f transition bands were observed in the absorption and MCD spectra, but no CD signals associated with these transitions were observed even in the S-proOHdtc complexes. The MCD spectral pattern of the Eu-III complexes revealed a local C-2v symmetry around the Ln(III) center in solution, in contrast to the aqua and the analogous beta-diketonato Eu-III complexes.

    DOI: 10.1016/j.ica.2018.09.064

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  • trans-Dichloridotetrakis(pyridine-κN)rhodium(III) chloride methanol tetrasolvate Reviewed

    Takayoshi Suzuki, Misaki Tsujino, Yukinari Sunatsuki

    IUCrData   3 ( 10 )   x181482   2018.10

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:International Union of Crystallography ({IUCr})  

    DOI: 10.1107/S2414314618014827

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  • Schiff Base Ligands Derived from l-Histidine Methyl Ester: Characterization, Racemization, and Dimerization of Their Transition-Metal Complexes

    Rina Ogawa, Yukinari Sunatsuki, Takayoshi Suzuki

    European Journal of Inorganic Chemistry   2018 ( 16 )   1733 - 1742   2018.4

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley-VCH Verlag  

    Reactions of methyl (S)-2-[(2-hydroxybenzylidene)amino]-3-(1H-imidazol-4-yl)propanoate (S-H2LMe) and various transition-metal(II) salts (MX2: M = Mn, Fe, Co, and Ni
    X = ClO4, Cl, OAc, etc.) are examined. During the reactions with MnII and CoII salts, the MII ion is oxidized by air to form a cationic complex with two mono-deprotonated ligands, [MIII(S-HLMe)2]X [M, X = Mn, ClO4 (S-1ClO4)
    Co, ClO4 (S-3ClO4)
    and Co, Cl (S-3Cl)], where (S-HLMe)– is coordinated to a MIII center in a tridentate κ3O,N,N′ mode with a mer configuration. In contrast, the NiII ion is not oxidized
    only one of the ligands is deprotonated to form a similar monocationic complex, [NiII(S-HLMe)(S-H2LMe)]PF6 (S-6PF6), which forms a dimer structure by double hydrogen bonds between the coordinating phenoxide and phenol groups in the crystal. Interestingly, the above complexes show slow racemization of the ligand, as confirmed by circular dichroism spectroscopy. Racemic NiII complexes of [Ni(HLMe)(H2LMe)](PF6 or Cl) (rac-6PF6 or rac-6Cl) are isolated and their crystal structures are confirmed by X-ray diffraction analysis. In the case where Co(OAc)2 is used as the metal(II) salt, a new ligand dimerization reaction takes place to afford a complex of [Co(H2LLMe)]Cl (7Cl, H4LLMe = methyl (E)-3-{[3-(1H-imidazol-4-yl)-1-methoxy-1-oxopropano-2-yl]amino}-2-[(1H-imidazol-4-yl)methyl]-2-[(2-hydroxybenzylidene)amino]-3-(2-hydroxyphenyl)propanoate).

    DOI: 10.1002/ejic.201800137

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  • Geometric isomerism and redox properties of ruthenium(II/III) complexes with 3-hydroxypicolinamide

    Ryoji Mitsuhashi, Takayoshi Suzuki, Masahiro Mikuriya

    Chemistry Letters   47 ( 4 )   479 - 482   2018

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Chemical Society of Japan  

    Two geometric isomers of [RuCl2(PPh3)2(O-N)]-type complex were prepared and characterized by X-ray crystallography (PPh3 = triphenylphosphine, O-N = Hpia/pia-, Hpia = 3-hydroxypicolinamide). The electrochemical properties of the complexes upon protonation/deprotonation were investigated. The redox potential of the Ru center was remarkably shifted by isomerization. The UV-vis and electrochemical measurements suggested that slow isomerization from trans(P,Cl),trans(P,N) geometry to trans(P,P) geometry induced the oxidation and deprotonation of the complex.

    DOI: 10.1246/cl.171166

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  • Field-induced single-molecule magnet behavior in ideal trigonal antiprismatic cobalt(II) complexes: precise geometrical control by a hydrogen-bonded rigid metalloligand

    Mitsuhashi, R., Pedersen, K.S., Ueda, T., Suzuki, T., Bendix, J., Mikuriya, M.

    Chemical Communications   54 ( 64 )   8869 - 8872   2018

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    DOI: 10.1039/c8cc04756a

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  • Hydrogen-bonding interactions and magnetic relaxation dynamics in tetracoordinated cobalt(II) single-ion magnets Reviewed

    Ryoji Mitsuhashi, Satoshi Hosoya, Takayoshi Suzuki, Yukinari Sunatsuki, Hiroshi Sakiyama, Masahiro Mikuriya

    Dalton Trans.   48 ( 2 )   395 - 399   2018

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    DOI: 10.1039/C8DT04537B

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  • Developing a Magnetic Circular Dichroism Apparatus Equipped with Neodymium Magnet for Students To Investigate the Electronic Structures of Transition Metals and Lanthanoids

    Abdallah Yakubu, Takayoshi Suzuki, Masakazu Kita

    JOURNAL OF CHEMICAL EDUCATION   94 ( 9 )   1357 - 1362   2017.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER CHEMICAL SOC  

    This paper describes the development of a simple magnetic circular dichroism (MCD) apparatus from a wood base and neodymium magnets and its configuration in the Faraday alignment. The applicability and effectiveness of the apparatus for MCD spectra measurements have been examined. The apparatus was used by undergraduate students to conduct MCD experiments on Ni2+, Nd3+, and Eu3+ ions in aqueous solutions. Absorption spectra of the sample solutions were also measured. The results of the MCD and absorption spectra of d-d and f-f transition were compared. The results indicate that the apparatus can be used to teach undergraduate students.

    DOI: 10.1021/acs.jchemed.7b00106

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  • Hydrogen-Bonded Supramolecular Structures of Cobalt(III) Complexes with Unsymmetrical Bidentate Ligands: mer/fac Interconversion Induced by Hydrogen-Bonding Interactions

    Ryoji Mitsuhashi, Takayoshi Suzuki, Satoshi Hosoya, Masahiro Mikuriya

    CRYSTAL GROWTH & DESIGN   17 ( 1 )   207 - 213   2017.1

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    Cobalt(III) complexes with three unsymmetrical bidentate ligands containing a noncoordinating N-H bond and a phenolate-O donor as hydrogen-bond donor and acceptor, respectively, were prepared and characterized. H-1 NMR spectroscopy indicated that all the tris-chelate Co(III) complexes prepared favor the mer configuration in solution. [Co(Hthp)(3)] and [Co(Himn)(3)] also possess the mer configuration in the crystals (Hthp(-) = 2-(1,4,5,6-tetrahydropyrimidin-2-yl)phenolate, Himn(-) = 2-(2-imidazolinyl)-phenolate). On the other hand, [Co(Himl(-))(3)] takes the fac configuration in the crystal (Himl(-) = 2-(2-irnidazolyl)-phenolate). 'these Co(III) complexes showed three types of characteristic supramolecular structures: ladder, distorted hexagonal sheet, and honeycomb sheet structure; constructed by intermolecular hydrogen bonds. Heating [Co(Himn)(3)] and [Co(Himl)(3)] in methanol selectively afforded precipitates of the fac isomer due to the low solubility of the hydrogen-bonded supramolecular structures. This mer to fac isomerization upon crystallization in methanol is presumably induced by the formation of highly ordered hydrogen-bond networks via the methanol molecule. The fac isomers remained intact in dimethyl sulfoxide (DMSO) for longer than a week at room temperature. Upon heating, however, fac to mer geometrical isomerization of both fac-[Co(Himn)(3)] and fac-[Co(Himl)(3)] was observed in DMSO. Thus, mer/fac interconversion was achieved by heating in two different solvents, due to the forrnation of a supramolecular assembly of hydrogen-bond networks.

    DOI: 10.1021/acs.cgd.6601438

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  • Effective cleaning of copper stained calcareous stone

    Sanne Spile, Takayoshi Suzuki, Jesper Bendix, Kim Pilkjaer Simonsen

    HERITAGE SCIENCE   4 ( 29 )   1 - 6   2016.10

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    Background: Light calcareous stone materials used in connection with cultural heritage objects, such as pedestals, or used as wall facings in connection with bronze statues or joints often show green staining due to the corrosion products from the bronze elements. The green stains alter the appearance of the monument and thus disrupt the original intention. Due to this, several cleaning methods, often involving ammonia, have been developed for removal of copper stains from stone surfaces. This paper describes a new, highly efficient method for cleaning copper stains from calcareous stone by introducing the chelating agent ethylenediamine in a poultice consisting of Laponite (R) RD, Arbocel (R) BC1000 and CMC.
    Results: Cleaning experiments were performed on marble and on a calcareous sandstone plinth contaminated with natural copper corrosion products due to outdoor exposure of an untreated bronze statue. The cleaning results were evaluated by visual observations.
    Conclusion: The chemical cleaning of copper stained calcareous stone surfaces has been investigated and a new method for removal of copper stains has been developed. A solution of 0.1 M ethylenediamine in a poultice consisting of Laponite (R) RD/Arbocel (R) BC1000/CMC has shown to be an effective, economical, and fast do-it-yourself method.

    DOI: 10.1186/s40494-016-0102-5

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  • Thyminato-bridged cyclic tetranuclear rhodium(III) complexes containing a sodium, calcium or lanthanoid ion as a template metal core

    Mika Sakate, Ayana Kashima, Haruka Hosoda, Yukinari Sunatsuki, Hiromi Ota, Akira Fuyuhiro, Takayoshi Suzuki

    INORGANICA CHIMICA ACTA   452 ( 1 )   205 - 213   2016.10

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    Reactions of [(Cp*Rh)(2)(mu-OH)(3)]OH (Cp*=eta(5)-C5Me5-) and thymine (=H(2)thym) in methanol in the presence or absence of a certain metal salt were examined. From the reaction mixture without any template metal salt, a dinuclear hydroxido-bridged complex bearing monodentate monodeprotonated thyminato ligands,1[Cp*Rh(Hthym-kappa N-1))(2)(mu-OH)(2)], was isolated after recrystallization from water. In the presence of a metal salt MXn{=NaPF6, NaBF4, NaNO3, Ca(NO3)(2), Ca(ClO4)(2), La(NO3)(3), Eu(NO3)(3), Dy(NO3)(3) and Er (NO3)(3)) were deposited orange crystals (1P, 1B, 1N, 2N, 2C, 3N, 4N, 5N and 6N, respectively) which consist of a thyminato(2-)-bridged tetranuclear Cp*Rh complex incorporating a Mn+ cation, [(Cp*Rh)(4)(mu-thym)(4)M](n+). All complexes were characterized by the single-crystal X-ray diffraction method, which revealed that homochiral aggregations of four Rh-III centers were achieved to give metallacalix[4]arene-type clusters. It was also observed that the bridging modes of thyme(2-) ligands were dependent on the template metal ion. In the Na+-incorporated clusters (1X, X = P, B or N) a thyme(2-) ligand bridged two Rh-III and the third Na+ ions with a mu(3)-1 kappa N-1:2 kappa N-2(3),O-2:3 kappa O-2 mode, while in the Ln(3+) analogs (Ln = La, Eu, Dy or Er: 3N-6N) thyme(2-) exhibited a different bridging mode, mu(3)-1 kappa N-1:2 kappa N-2(3),O-4:3 kappa O-2. In the cases of Ca2+-incorporated clusters, the bridging mode is further dependent on the associated anion; only the mu(3)-1 kappa N-1:2 kappa N-2(3),O-2:3 kappa O-2-type cluster was obtained in the NO3- salt (2N), but the ClO4- salt (2C) afforded both types of the bridging clusters piled up alternatively in the crystals. The tetranuclear structures with a template metal cation, [(Cp*Rh)(4)(mu-thym)(4)M](n+), are maintained in solution. The magnetic behaviors of the Dy3+- and Er3+-incorporated complexes (5N and 6N) are also reported. (C) 2016 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.ica.2016.01.023

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  • Preparation, structures and properties of manganese complexes containing amine-(amido or amidato)-phenolato type ligands

    Ryoji Mitsuhashi, Rina Ogawa, Ryuta Ishikawa, Takayoshi Suzuki, Yukinari Sunatsuki, Satoshi Kawata

    INORGANICA CHIMICA ACTA   447   113 - 120   2016.6

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    Complexation of 2-hydroxy-N-(n-aminoalkyl)benzamides, where n-aminoalkyl substituents are 2-amino-2-methylpropyl (H(2)L2(Me2)), (R)-2-aminopropyl {(R)-H(2)L2(Me)} and 3-aminopropyl (H(2)L3), with manganese(II)chloride or perchlorate were examined. With the 2-aminopropyl derivatives, dinuclear methoxido-bridged manganese(III) complexes bearing the dianionic ligands, [{Mn(L2(Me2) or (R)-L2(Me)) (MeOH)}(2)(mu-OMe)(2)] (2 or 4), were isolated and their crystal structures were determined. There was a weak antiferromagnetic interaction between two axially distorted Mn-III centers in 2. Also, with the ligand of (L2(Me2))(2) a mononuclear manganese(IV)complex, [Mn(L2(Me2))(2)]center dot DMF (3 center dot DMF) was obtained. In the crystal of 3 center dot DMF a heterochiral dimerization via the intermolecular double hydrogen-bonds was observed. In the case of reactions with H(2)L3, mononuclear manganese(III)complexes, [Mn(H(2)L3 ')(2)Cl-2] Cl (6)and [Mn(H(2)L3 ')(2)(MeOH)(2)]Cl-2(ClO4)(7), were afforded, where the ligand (H(2)L3 ')has a phenolateamide-ammonium type zwitterionic form of H(2)L3 and coordinates to a Mn-III center via the phenolato-O and amide-O atoms to form a six-membered chelate ring. Furthermore, a tetranuclear (Mn2Mn2III)-Mn-II double incomplete-cubane type cluster compound, [Mn-4(HL3)(2)Cl-2(OMe)(6)(MeOH)(2)]center dot 4MeOH (5a center dot 4MeOH) was revealed by the single-crystal X-ray diffraction study, although the bulk crystals (5)obtained from the reaction mixture showed a different PXRD pattern. The elemental analysis of the bulk crystals of 5 suggested that they consist of the same tetranuclear clusters. It is interesting that the bulk crystals of 5 were highly efflorescent, and it was suggested that their coordinated MeO and MeOH ligands were easily substituted by OH and H2O, respectively, in atmospheric air. This conversion changed their magnetic behaviors drastically. (C) 2016 Elsevier B.V. All rights reserved.

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  • Effective cleaning of rust stained marble

    Sanne Spile, Takayoshi Suzuki, Jesper Bendix, Kim Pilkjaer Simonsen

    HERITAGE SCIENCE   4 ( 12 )   1 - 10   2016.5

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    Background: Calcareous materials, like marble used in connection with cultural heritage objects such as statues and pedestals, or as wall facings on buildings, often show a brownish staining owing to contact with iron metal or iron-containing minerals in the stone. The discolouration alters the appearance of the stone, which is undesirable from an aesthetic point of view. Despite rust staining being a conspicuous phenomenon and numerous works that have dealt with the problem of removing rust stains, a simple and non-toxic method has so far been missing. This paper describes a highly efficient method for cleaning rust stains from marble by introducing the chelating amino acid cysteine in a Laponite poultice in combination with the strong reducing agent sodium dithionite.
    Results: Cleaning experiments were performed on artificially discoloured samples of various types of Carrara Bianco marble and on naturally rust stained marble. To begin with, solutions of cysteine in combination with sodium dithionite and ammonium carbonate were tested by immersion of samples into the different solutions. Secondly, solutions of cysteine and sodium dithionite with and without buffering were used in a poultice consisting of Laponite (R) RD, Arbocel (R) BC1000 and CMC. The poultice was applied on three different marble types: Carrara Fabricotti, Carrara Vagli and Carrara La Piana. Thirdly, the optimized method was tested on original rust stained material of Greenlandic marble, which has been used as wall facing, and finally in situ in Copenhagen on a larger area of The Marble Church showing rust stains due to pyrite oxidation. The cleaning results were evaluated by visual observations, cross sections, and etching of the surface by testing on high gloss marble.
    Conclusion: Cleaning of iron-discoloured marble surfaces has been investigated and a new method for removal of rust stained marble has been developed. A solution of 0.1 M cysteine and 0.1 M sodium dithionite in a poultice consisting of Laponite (R) RD/Arbocel (R) BC1000/CMC = 10:10:1 has shown to be a fast, simple, cheap, and non-toxic, do-it-yourself method.

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  • Crystal structures of bis[2-(pyridin-2-yl)phenylk2N,C1]rhodium(III) complexes containing an acetonitrile or monodentate thyminate(1-) ligand

    Mika Sakate, Haruka Hosoda, Takayoshi Suzuki

    Acta Crystallographica Section E: Crystallographic Communications   72   543 - 547   2016.4

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    The crystal structures of bis[2-(pyridin-2-yl)phenyl]rhodium(III) complexes with the metal in an octahedral coordination containing chloride and acetonitrile ligands, namely (OC-6-42)-acetonitrilechloridobis[2-(pyridin-2- yl)phenyl-2N,C1]rhodium(III), [RhCl(C11H8N)2(CH3CN)] (1), thyminate(1-) and methanol, namely (OC-6-42)-methanol(5-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin- 1-ido-N1)bis[2-(pyridin-2-yl)phenyl-2N,C1]rhodium(III), [Rh(C11H8N)2(C5H5N2O2)(CH3OH)]CH3OH0.5H2O (2), and thyminate( 1-) and ethanol, namely (OC-6-42)-ethanol(5-methyl-2,4-dioxo- 1,2,3,4-tetrahydropyrimidin-1-ido-N1)bis[2-(pyridin-2-yl)phenyl-2N,C1]rhodium( III), [Rh(C11H8N)2(C5H5N2O2)(C2H5OH)]C2H5OH (3), are reported. The acetonitrile complex, 1, is isostructural with the IrIII analog. In complexes 2 and 3, the monodeprotonated thyminate (Hthym-) ligand coordinates to the RhIII atom through the N atom, and the resulting Rh-N(Hthym) bond lengths are relatively long [2.261 (2) and 2.252 (2) A ° for 2 and 3, respectively] as compared to the Rh-N bonds in the related thyminate complexes. In each of the crystals of 2 and 3, the complexes are linked via a pair of intermolecular N- H O hydrogen bonds between neighbouring Hthym- ligands, forming an inversion dimer. A strong intramolecular O-H O hydrogen bond between the thyminate(1-) and alcohol ligands in mutually cis positions to each other is also observed.

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  • Circularly Polarized Luminescence of Chiral Pt(pppb)Cl (pppbH=1-pyridyl-3-(4,5-pinenopyridyl)benzene) Aggregate in the Excited State

    Saori Tanaka, Kyohei Sato, Kyoko Ichida, Taichi Abe, Taro Tsubomura, Takayoshi Suzuki, Kazuteru Shinozaki

    CHEMISTRY-AN ASIAN JOURNAL   11 ( 2 )   265 - 273   2016.1

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    We prepared enantiomers of chiral Pt-II complexes, Pt(pppb)Cl and Pt(pppb)CN (pppbH=1-pyridyl-3-(4,5-pinenopyridyl)benzene), and measured their CPL (circularly polarized luminescence) spectra for excimer and trimer emission. The contribution of the pinene moiety to CPL was considerably low for the -* emission of the monomer but large for MMLCT (metal-metal-to-ligand charge-transfer) of the excimer and trimer which had a helical structure induced in a face-to-face stacking fashion. The trimer CPL for (+)-Pt(pppb)Cl was larger in intensity than that of excimer CPL; on the other hand, that for (+)-Pt(pppb)CN was opposite in sign compared with that of excimer CPL. We conclude that differences in the excited-state structure of the aggregate between Pt(pppb)Cl and Pt(pppb)CN account for the variation in the CPL spectra. By the aid of TD-DFT calculations it was predicted that the dihedral angle (Cl-Pt-Pt-Cl) was 50-60 degrees or 110-140 degrees for Pt(pppb)Cl aggregates and 160 degrees for Pt(pppb)CN aggregates.

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  • Coordination Structure Conversion of Hydrazone-Palladium(II) Complexes in the Solid State and in Solution

    Fumi Kitamura, Kana Sawaguchi, Asami Mori, Shoji Takagi, Takayoshi Suzuki, Atsushi Kobayashi, Masako Kato, Kiyohiko Nakajima

    INORGANIC CHEMISTRY   54 ( 17 )   8436 - 8448   2015.9

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    We prepared hydrazone palladium(II) complexes of [PdCl2(HLn)] and [PdCl(L-n)] (n = 1-3) by the reaction of [PdCl2(cod)] or [PdCl2(PhCN)(2)] and the hydrazone ligands of HLn {N'-(pyridin-2-ylmethylene)picolinohydrazide (HL1), N'-[1-(pyridin-2-yl)ethylidene]picolinohydrazide (HL2), and N'-[(6-methylpyridin-2-yOmethylene]picolinohydrazide (HL3)}. The structures of the complexes were determined by X-ray analysis. The hydrazone ligands had kappa N(pyl), kappa N(imine) and kappa N(amidate) kappa N(py2) bidentate coordination modes in [PdCl2(HLn] (1, n = 1; 2, n = 2) and in [PdCl2(HL3)] (3), respectively. In contrast, tridentate coordination modes of kappa N(pyl)), kappa N(imine), kappa N(py2) and kappa N(py1), kappa N(amidate), kappa N(py2) were observed in [PdCl(L-n)] (4, n = 1; 5, n = 2) and in [PdCl(L-n)] (6, n = 1; 7, n = 2; 8, n = 3). Thermal conversion of complexes 1-3 to complexes 6-8 proceeded in acetonitrile. Complexes 4 and 5 were obtained from complexes 1 and 2, respectively, in a basic acetonitrile solution under dark conditions. Complex 4 reverted immediately to complex 1 in an acidic acetonitrile solution that included hydrochloric acid. However, under room light, in the basic acetonitrile solution that included trimethylamine, complex 4 converted photochemically to complex 6. The thermochromic or vapochromic structure conversion of these complexes also occurred in the solid state. On heating at 180 degrees C, the color of the crystals of complexes 1, 2, and 3 changed from yellow to orange in the solid state. H-1 NMR and/or UV vis absorption spectroscopy confirmed that the orange complexes 6-8 were produced. The reddish-orange crystals of complexes 4 and 5 were exposed to hydrogen chloride vapor to yield the yellow products of complexes 1 and 2, respectively.

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  • Crystal structures of dichloridopalladium(II), -platinum(II) and -rhodium(III) complexes containing 8-(diphenylphosphanyl) quinoline

    Takayoshi Suzuki, Hiroshi Yamaguchi, Masayuki Fujiki, Akira Hashimoto, Hideo D. Takagi, H. Ishida

    Acta Crystallographica Section E: Structure Reports Online   71 ( 5 )   447 - 451   2015.5

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    The crystal structures of dichloridopalladium(II), -platinum(II) and - rhodium(III) complexes containing 8-(diphenylphosphanyl) quinoline, (SP-4)-[PdCl2(C21H16NP)], (1) [systematic name: dichlorido(8-diphenylphosphanyl-quinoline) palladium(II)], (SP-4)-[PtCl2(C21H16NP)]·CH2Cl2, (2) [systematic name: dichlorido(8-diphenylphosphanylquinoline) platinum(II) dichlorometh-ane monosolvate], and (OC-6-32)-[RhCl2(C21H16NP)2]PF6·0.5CH2Cl2·-0.5CH3OH, (3) [systematic name: cis-dichloridobis(8-diphenylphosphanyl-quinoline) rhodium(III) hexafluoridophosphate dichloromethane/methanol hemisolvate] are reported. In these complexes, the phosphanylquinoline acts as a bidentate ligand, forming a planar asymmetrical five-membered chelate ring. The palladium(II) and platinum(II) complex molecules in (1) and (2), respectively, show a typical square-planar coordination geometry and form a dimeric structure through an intermolecular π-π stacking interaction between the quinolyl rings. The centroid-centroid distances between the stacked six-membered rings in (1) and (2) are 3.633 (2) and 3.644 (2) Å, respectively. The cationic rhodium(III) complex in (3) has a cis(Cl),cis(P),cis(N) (OC-6-32) configuration of the ligands, in which two kinds of intramolecular π-π stacking interactions are observed: between the quinolyl and phenyl rings and between two phenyl rings, the centroid-centroid distances being 3.458 (2) and 3.717 (2) Å, respectively. The PF6 - anion in (3) is rotationally disordered, the site occupancies of each F atom being 0.613 (14) and 0.387 (14). The CH2Cl2 and CH3OH solvent molecules are also disordered and equal site occupancies of 0.5 are assumed.

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  • X-ray diffraction and vibrational spectroscopic study of trans-bis(acetylacetonato)-bis(4-methylpyridine)cobalt(III)

    Sayyed Faramarz Tayyari, Mohammad Hossien Habibi, Elahe Shojaee, Mina Jamialahmadi, Robert Erik Sammelson, Koki Wada, Takayoshi Suzuki

    SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY   139 ( 1 )   94 - 101   2015.3

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    Trans-bis(acetylacetonato)-bis(4-methylpyridine)cobalt(III)hexafluorophosphate, [AMPC]PF6, was synthesized and characterized by X-ray diffraction and vibrational spectroscopy. The title compound C22H28-N2O4Co crystallizes with Z = 2 in space group P-1 (#2). The molecular structure and vibrational spectra of this compound were investigated by means of density functional theory (DFT) calculations and the results were compared with the experimental data. The measured IR bands were interpreted in terms of the calculated vibrational normal modes and compared with the tris(acetylacetonate)Co(III) (Co(acac)(3)) and 4-methylpyridine (4-Mepy) vibrational spectra. The scaled theoretical wavenumbers and the structural parameters were in excellent agreement with the experimental data. (C) 2014 Elsevier B.V. All rights reserved.

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  • Oxidation and Deprotonation of a Ruthenium(II) Complex with Quinoline-2-carbaldehyde (Pyridine-2-carbonyl)hydrazone and Formation of Hydrazonato-Bridged Heterodimetallic Complexes Reviewed

    Asami Mori, Takayoshi Suzuki, Yukinari Sunatsuki, Masaaki Kojima, Kiyohiko Nakajima

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   88 ( 3 )   480 - 489   2015.3

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    Reactions of a ruthenium(II) complex containing quinoline-2-carbaldehyde (pyridine-2-carbonyl)hydrazone (HL), trans(P,P)-[RuCl2(PPh3)(2)(HL)] (1), and 3d-metal(II) chlorides resulted in heterodimetallic complexes, [RuCl2(PPh3)(2)-(mu-L)MCl2] (2M, M = Mn, Fe, Co, Ni, Cu, and Zn), in which the deprotonated hydrazonate (L-) bridged two metal ions in the mu-1(Ru)kappa N-2,O:2(M)kappa N-3',N '',N''' mode. The coordination bond lengths around the Ru and M centers suggested that the oxidation states in the complexes 2M could be assigned as Ru-III and M-II; this was also supported by magnetic, electrochemical, and spectroscopic measurements. In addition, oxidation of complex 1 by (NH4)(2)[Ce(NO3)(6)] gave the corresponding mononuclear Ru-III complex with the deprotonated hydrazonate, trans(P,P)-[RuCl2(PPh3)(2)(L)] (3). It is suggested that oxidation of the Ru center lead to the concerted deprotonation from the hydrazone ligand. Addition of excess HClO4 to complex 3 gave a doubly protonated Ru-III complex, 4(ClO4)(2); in this complex the hydrazonate moiety was not protonated, but both the quinolyl and pyridyl N atoms were protonated. Complexes 3 and 4(2+) could be interconverted by the addition of acid or base without changing the oxidation state of the Ru center.

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  • Crystal structure of bis(2, 2′-bipyridine)[N′-(quino-lin-2-ylmethylidene)pyridine-2-carbohydrazide]-ruthenium(II) bis(tetrafluoridoborate) dichloro-methane trisolvate

    Asami Mori, Takayoshi Suzuki, Kiyohiko Nakajima, M. Weil

    Acta Crystallographica Section E: Structure Reports Online   71 ( 2 )   142 - 145   2015.2

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    The title compound, [Ru(C&lt
    inf&gt
    10&lt
    /inf&gt
    H&lt
    inf&gt
    8&lt
    /inf&gt
    N&lt
    inf&gt
    2&lt
    /inf&gt
    )&lt
    inf&gt
    2&lt
    /inf&gt
    (C&lt
    inf&gt
    16&lt
    /inf&gt
    H&lt
    inf&gt
    12&lt
    /inf&gt
    N&lt
    inf&gt
    4&lt
    /inf&gt
    O)](BF&lt
    inf&gt
    4&lt
    /inf&gt
    )&lt
    inf&gt
    2&lt
    /inf&gt
    ·3CH&lt
    inf&gt
    2&lt
    /inf&gt
    Cl&lt
    inf&gt
    2&lt
    /inf&gt
    , crystallizes with one complex dication, two BF&lt
    inf&gt
    4&lt
    /inf&gt
    &lt
    sup&gt
    -&lt
    /sup&gt
    counter-anions and three dichloromethane solvent molecules in the asymmetric unit. The central Ru&lt
    sup&gt
    II&lt
    /sup&gt
    atom adopts a distorted octahedral coordination sphere with two 2, 2′-bipyridine (bpy) and one quinoline-2-carbaldehyde (pyridine-2-carbonyl)hydrazone (HL) ligand. The hydrazone ligand has a Z form and coordinates to the Ru&lt
    sup&gt
    II&lt
    /sup&gt
    atom via the amide-O and imine-N atoms, affording a planar five-membered chelate ring, while its pyridine-N and quinoline-N donor atoms in the substituents are non-coordinating. The hydrazone N - H group forms an intramolecular hydrogen bond with the quinoline-N atom. In the crystal, the quinoline moiety of HL shows the shortest π-π stacking interaction with the pyridine substituent of HL in a neighbouring complex, the centroid-to-centroid distance being 3.793 (3) Å.

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  • Palladium(II) mononuclear and palladium(II)/ruthenium(II) heterodinuclear complexes containing 2-quinolyl-substituted (pyridine-2-carbonyl)hydrazone

    Asami Mori, Takayoshi Suzuki, Yuichi Nakatani, Yukinari Sunatsuki, Masaaki Kojima, Kiyohiko Nakajima

    DALTON TRANSACTIONS   44 ( 36 )   15757 - 15760   2015

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    A reaction of [PdCl2(cod)] (cod = 1,5-cyclooctadiene) and an E/Z mixture of quinoline-2-carbaldehyde (pyridine-2-carbonyl) hydrazone (HL) gave two kinds of Pd-II mononuclear complexes, [PdCl-(Z-L-kappa N-3,N',N '')] (1) and [PdCl2(E-HL'-kappa N-2,N')] (2), where L- is the deprotonated hydrazonate anion and HL' is the quinolinium-hydrazonate zwitterionic form of HL. Complex 2 is gradually converted to 1 in solution, and complex 1 is a good precursor to prepare a Pd-II/Ru-II heterodinuclear complex bridged by hydrazonate, trans(Cl, Cl)-[RuCl2(PPh3)(2)(mu-L)PdCl] (3).

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  • Thyminate(2-)-bridged cyclic tetranuclear rhodium(III) complexes formed by a template of a sodium, calcium or lanthanoid ion

    Ayana Kashima, Mika Sakate, Hiromi Ota, Akira Fuyuhiro, Yukinari Sunatsuki, Takayoshi Suzuki

    CHEMICAL COMMUNICATIONS   51 ( 10 )   1889 - 1892   2015

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    In the thyminate(2-)-bridged tetranuclear Cp*Rh-III complexes incorporating a Na+, Ca2+ or Ln(3+) cation, homochiral aggregation of four Rh-III centres was achieved to form metallacalix[4] arene-type clusters. The thyminate(2-) bridged two RhIII and the third metal ionwith a mu(3)-1 kappa N-1:2 kappa N-2(3),O-2:3 kappa O-2 mode in the Na+ and Ca2+ complexes, while in the Ln(3+) analogues it exhibited a different bridging mode, mu(3)-1 kappa N-1:2 kappa N-2(3),O-4:3 kappa O-2.

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  • Flipping of the coordinated triazine moiety in Cu(I)-L-2 and the small electronic factor, kappa(el), for direct outer-sphere cross reactions: syntheses, crystal structures and redox behaviour of copper (II)/(I)-L-2 complexes (L=3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine)

    Atsutoshi Yamada, Takuya Mabe, Ryohei Yamane, Kyoko Noda, Yuko Wasada, Masahiko Inamo, Koji Ishihara, Takayoshi Suzuki, Hideo D. Takagi

    DALTON TRANSACTIONS   44 ( 31 )   13979 - 13990   2015

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    Six-coordinate [Cu(pdt)(2)(H2O)(2)](2+) and four-coordinate [Cu(pdt)(2)](+) complexes were synthesized and the cross redox reactions were studied in acetonitrile (pdt = 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine). Single crystal analyses revealed that [Cu(pdt)(2)(H2O)(2)](BF4)(2) was of pseudo-D-2h symmetry with two axial water molecules and two symmetrically coordinated equatorial pdt ligands, while the coordination structure of [Cu(pdt)(2)]BF4 was a squashed tetrahedron (dihedral angle = 54.87 degrees) with an asymmetric coordination by two pdt ligands: one pdt ligand was coordinated to Cu(I) through pyridine-N and triazine-N2 while another pdt ligand was coordinated through pyridine-N and triazine-N4, and a stacking interaction between the phenyl ring on one pdt ligand and the triazine ring on another pdt ligand caused the squashed structure and non-equivalent Cu-N bond lengths. The cyclic voltammograms for [Cu(pdt)(2)(H2O)(2)](2+) and [Cu(pdt)(2)](+) in acetonitrile were identical to each other and quasi-reversible. The reduction of [Cu(pdt)(2)(H2O)(2)](2+) by decamethylferrocene and the oxidation of [Cu(pdt)(2)](+) by [Co(2,2'-bipyridine)(3)](3+) in acetonitrile revealed that both cross reactions were sluggish through a gated process (the structural change took place prior to the electron transfer) accompanied by slow direct electron transfer processes. It was found that the triazine ring of the coordinated pdt ligand rotates around the C-C bond between the triazine and pyridine rings with the kinetic parameters k = 51 +/- 5 s(-1) (297.8 K), Delta H-double dagger = 6.2 +/- 1.1 kJ mol(-1) and Delta S-double dagger = -192 +/- 4 J mol(-1) K-1. The electron self-exchange process was directly measured using the line-broadening method: k(ex) = (9.9 +/- 0.5) x 10(4) kg mol(-1) s(-1) (297.8 K) with Delta H-double dagger = 44 +/- 7 kJ mol(-1) and Delta S-double dagger = 0.2 +/- 2.6 J mol(-1) K-1. By comparing this rate constant with the self-exchange rate constants estimated from the cross reactions using the Marcus cross relation, the nonadiabaticity (electronic) factors, kappa(el), for the direct electron transfer processes between [Cu(pdt)(2)](+/2+) and non-copper metal (Fe2+ and Co3+) complexes were estimated as ca. 10(-7), indicating that the electronic coupling between the d orbitals of copper and of non-copper metals is very small.

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  • Syntheses, Crystal Structures and Ligand Field Properties of Iron(II) Complexes with PNP Ligands: Origin of Large Ligand Field by a Phosphorous Donor Atom

    Takuya Mabe, Hiroshi Yamaguchi, Masayuki Fujiki, Kyoko Noda, Koji Ishihara, Masahiko Inamo, Refat Moustafa Hassan, Satoshi Iwatsuki, Takayoshi Suzuki, Hideo D. Takagi

    JOURNAL OF SOLUTION CHEMISTRY   43 ( 9-10 )   1574 - 1587   2014.10

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    New iron(II) complexes were synthesized with two tridentate hybrid ligands having phosphorous and nitrogen donor sites, in order to quantitatively estimate the difference of the ligand-field strengths of phosphorous and nitrogen donor sites in cationic metal complexes. Iron(II) complexes with bis(dimethylphosphinoethyl)amine (PNP) and 2,6-bis(diphenylphosphinomethyl)pyridine (PpyP) ligands crystallized as un-symmetric facial-[Fe(PNP)(2)](PF6)(2)center dot CH3NO2 and mer-[Fe(PpyP)(2)](CF3SO3)(2), respectively, as expected from the steric congestion and from the tendency to avoid the mutual trans influence between two phosphorous donor sites. Both complexes are in the low-spin electronic state up to 400 K. The pseudo-D (4h) coordination geometry of the PpyP complex made it possible to separate axial (2 x N) and equatorial (4 x P) contributions to the overall ligand-field by means of a spectrometric method: the difference in the ligand-field strengths by the equatorial Ph2P-donor sites and by the axial 2,6-disubstituted pyridine donor sites is ca. 13,200 cm(-1). A significantly reduced inter-electronic repulsion parameter (425 cm(-1) for both PNP and PpyP complexes) from the value of the free ion (1,060 cm(-1)) indicates covalent interaction between the Fe(II) and P atoms even in these cationic metal complexes. It is shown that the degree of covalency as well as the coordination bond strengths between various metal ions and phosphorous/nitrogen donor atoms is successfully explained by the relative energy levels of interacting atomic orbitals calculated on the basis of the Thomas-Fermi-Dirac potential.

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  • Crystal Structure and Spectroscopic Properties of Cyclic Dipeptide: A Racemic Mixture of cyclo(D-Prolyl-L-Tyrosyl) and cyclo(L-Prolyl-D-Tyrosyl)

    Yong Pyo Hong, Sung-Hong Lee, Jong-Ha Choi, Ayana Kashima, Go Nakamura, Takayoshi Suzuki

    BULLETIN OF THE KOREAN CHEMICAL SOCIETY   35 ( 8 )   2299 - 2303   2014.8

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    Two diastereoisomers of cyclo(Pro-Tyr) have been synthesized simultaneously. The crystal structures and conformations of both cyclo(L-Pro-L-Tyr) and a racemic mixture of cyclo(D-Pro-L-Tyr) and cyclo(L-Pro-D-Tyr), abbreviated as rac-cyclo(D-Pro-L-Tyr/L-Pro-D-Tyr), have been determined by a single-crystal X-ray diffraction study at low temperature. The crystals of rac-cyclo(D-Pro-L-Tyr/L-Pro-D-Tyr) belong to orthorhombic space group Pna2(1) with a = 10.755 (1), b = 12.699 (1), c = 9.600 (1) angstrom and Z = 4. The tyrosine side chain is folded towards the diketopiperazine (DKP) ring. The DKP ring adopts a twist boat conformation with pseudo symmetry C-2v. The pyrrolidine ring has an envelope conformation with the N5, C4, C7 and C8 atoms in a plane. The crystal of rac-cyclo(D-Pro-L-Tyr/L-Pro-D-Tyr) is stabilized by hydrogen bonds between amide N2-H2 and carbonyl oxygen O2 in the neighbor. The hydroxyl group of tyrosine residue is also hydrogen bonded to the oxygen of the carbonyl group of the DKP ring in the next molecule. The spectroscopic properties of both isomers are also described.

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  • Chiral Crystal Structure of a P2(1)2(1)2(1) Kryptoracemate Iron(II) Complex with an Unsymmetric Azine Ligand and the Observation of Chiral Single Crystal Circular Dichroism

    Yukinari Sunatsuki, Kunihiro Fujita, Hisashi Maruyama, Takayoshi Suzuki, Hiroyuki Ishida, Masaaki Kojima, Robert Glaser

    CRYSTAL GROWTH & DESIGN   14 ( 8 )   3692 - 3695   2014.8

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    A chiral complex, [Fe(HL)(2)](PF6)(2) (1), where HL denotes 2-pyridylmethylidenehydrazono-4-(2-methylimidazoly)methane, was prepared. X-ray structure analysis revealed that it crystallizes as a kryptoracemate of sesquihydrate chiral crystals in the orthorhombic non-centrosymmetric space group P2(1)2(1)2(1) (Z = 8, Z' = 2). Two diastereomeric cationic complexes with opposite configuration reside within the asymmetric unit. KBr pellets prepared using selected single crystals showed enantiomorphous circular dichroism patterns.

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  • Electrochemical Behavior of Phosphine-Substituted Ruthenium(II) Polypyridine Complexes with a Single Labile Ligand

    Go Nakamura, Masaya Okamura, Masaki Yoshida, Takayoshi Suzuki, Hideo D. Takagi, Mio Kondo, Shigeyuki Masaoka

    INORGANIC CHEMISTRY   53 ( 14 )   7214 - 7226   2014.7

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    A series of phosphine-substituted ruthenium poly-pyridine complexes, cis(P,Cl)-[Ru(trpy)(Pqn)Cl]PF6 (cis-Cl), trans(P,MeCN)-[Ru(trpy)(Pqn)(MeCN)](PF6)(2) (trans-PN), cis(P,MeCN)-[Ru(trpy)(Pqn)(MeCN)] (PF6)(2) (cis-PN), and [Ru(trpy)(dppbz)(MeCN)] (PF6)(2) (PP), were synthesized and crystallographically characterized (trpy = 2,2':6',2 ''-terpyridine, Pqn = 8-(diphenylphosphanyl)quinoline, and dppbz = 1,2-bis(diphenylphosphanyl)benzene). In electrochemical measurements for cis-PN and PP, the reduction of cis-PN resulted in the formation of trans-PN via cis trans isomerization and that of PP proceeded via a two-electron-transfer reaction. The mechanism of the electrochemical behaviors is discussed through consideration of five-coordinated species, [Ru(trpy)(Pqn)](n+) or [Ru(trpy)(dppbz)](n+) (n = 0-2), formed by liberation of a monodentate labile ligand.

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  • Chiral Incomplete-cubane-type (Mn3O4)-O-III Clusters Containing a mu(3)-Methoxido or Hydroxido

    Marina Inoue, Takayoshi Suzuki, Yukinari Sunatsuki, Akira Fuynhiro, Nazzareno Re

    CHEMISTRY LETTERS   43 ( 6 )   784 - 786   2014.6

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    Two new cluster compounds having chiral incomplete-cubane-type (Mn3O4)-O-III cores were synthesized using (2S)-2-hydroxy-4-(salicylideneamino)butyrate (H2L-) and characterized by X-ray analysis as well as magnetic susceptibility and spectroscopic measurements. Compound 1 contains a [Mn-3(III)(L)(3)(mu(3)-OMe)](-) cluster anion, while compound 2 prepared in water has a heptanuclear structure bearing two [Mn-3(III)(L)(3)(mu(3)-OH)](-) clusters connected by a Mn-II(H2O)(4) fragment. In both compounds, a moderate intracluster (MnMnIII)-Mn-III center dot center dot center dot)31 ferromagnetic interaction was observed. It was also found that the (Mn3O4)-O-III cluster cores are maintained in solution.

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  • Linkage and Geometrical Isomers of Dichloridobis(triphenylphosphine)ruthenium(II) Complexes with Quinoline-2-carbaldehyde (Pyridine-2-carbonyl)hydrazone: Their Molecular Structures and Electrochemical and Spectroscopic Properties

    Asami Mori, Takayoshi Suzuki, Yukinari Sunatsuki, Atsushi Kobayashi, Masako Kato, Masaaki Kojima, Kiyohiko Nakajima

    EUROPEAN JOURNAL OF INORGANIC CHEMISTRY   2014 ( 1 )   186 - 197   2014.1

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    The reactions of quinoline-2-carbaldehyde (pyridine-2-carbonyl)hydrazone (HL) and [RuCl2(PPh3)(3)] in various solvents at different temperatures gave the three geometrical isomers trans(Cl,Cl)-, cis(Cl,Cl),trans(P,N)-, and trans(P,P)-[RuCl2(PPh3)(2){HL-O(amide),N(imine)}] (1, 2, and 3, respectively) as well as a linkage isomer trans(P,P)-[RuCl2(PPh3)(2){HL-N(imine),N(quin)}] (4). The molecular and crystal structures of 1-4, together with both E and Z configurational isomers (with respect to the C=N double bond) of the free ligand HL, were determined by X-ray analysis. The ligand HL adopted a Z form and acted as a O(amide),N(imine) bidentate ligand in 1-3, whereas it was an E isomer with a N(imine),N(quin) coordination mode in 4. The gradual thermal conversions of 1 to 2 and of 2 to 3 were observed in dichloromethane and ethanol, respectively, but an interconversion between 3 and 4 was not detected. In dichloromethane, all complexes have a reversible Ru-III/II redox couple in the range 110-412 mV (vs. Ag/Ag+), and the redox potential was largely dependent on the coordination mode of HL and on the mutual configuration of the two PPh3 ligands. Such a potential shift can be interpreted as a combination of Cl-/amide O -donor and PPh3/quinoline N -acceptor orbital contributions to the Ru-II d orbitals [highest occupied molecular orbitals (HOMOs)]. Complexes 3 and 4 in acetonitrile showed a gradual spectral change, probably because of the substitution of the Cl- ligand by the acetonitrile solvent. In addition, 2-4 showed solvatochromic behavior even in noncoordinating solvents that resulted from a blueshift of the metal-to-ligand charge-transfer (MLCT) transition band in polar solvents. These electrochemical and spectroscopic properties are also supported by DFT and time-dependent DFT (TD-DFT) calculations.

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  • Preparation, crystal structures, and spectroscopic properties of cobalt(III) complexes bearing 2,4-pentanedionate (acac(-)) and 2-cyanoethylphosphines: trans-[Co(acac)(2){P(CH2CH2CN)(n)Ph3-n}]BF4 (n=1-3)

    Keiko Kihara, Syohei Yamaguchi, Yasuo Kawahata, Masakazu Kita, Takayoshi Suzuki, Yukinari Sunatsuki, Masaaki Kojima, Kazuo Kashiwabara

    POLYHEDRON   67 ( 1 )   111 - 114   2014.1

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    A series of cobalt(III) complexes containing 2-cyanoethylphosphines, [Co(acac)(2){P(CH2CH2CN)(n)Ph3-n}(2)]-BF4 {acac = 2,4-pentanedionate; n = 1 (1), 2 (2), and 3 (3)} have been prepared, and their molecular and crystal structures have been determined. The X-ray diffraction study revealed that these complexes are the trans isomers in the crystals. The Co-P bond lengths are little affected by the number of 2-cyanoethyl substituents on the P atom, which is consistent with a small change of the sigma-donicity among these phosphines. The trans configuration of these complexes is maintained in solution, as revealed by 1H NMR spectroscopy. The 2-cyanoethylphosphines could not form stable cis-isomers of [Co(acac)(2){P(CH2CH2CN)(n)Ph3-n}(2)](+), like the corresponding methylphosphines (PMenPh3-n,). This fact probably results from a strong electron-withdrawing property of a terminal cyano group of phosphine substituent. In the UV-Vis absorption spectra of complexes 1-3, the LMCT transition band is observed in the range of 20500-24000 cm(-1), which is comparable to the analogous PMenPh3-n, complexes, but their intensity is characteristically weaker than that of the corresponding PMenPh3-n complexes. (C) 2013 Elsevier Ltd. All rights reserved.

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  • Molecular structure and spectroscopic properties of [Co( Me(2)dtc)(2) {(Ph2PO)(2)BF2}] (Me(2)dtc = N,N-dimethyldithiocarbamate)

    Kyohei Sakano, Syohei Yamaguchi, Takayoshi Suzuki, Yukinari Sunatsuki, Masaaki Kojima, Kazuo Kashiwabara

    INORGANICA CHIMICA ACTA   410 ( 1 )   122 - 125   2014.1

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    Oxidation of a blue ethanolic mixture containing Co(BF4)(2)center dot 6H(2)O and PClPh2 by tetramethylthiuram disulfide afforded a red- colored complex having a cis-[Co-III(Me(2)dtc)(2)(P)(2)] environment (Me(2)dtc = N, N-dimethyldithiocarbamate), although the yield was relatively low. Single- crystal X- ray crystallography revealed that the product was [Co(Me(2)dtc)(2){(Ph2PO)(2)BF2}] (1), where bis(diphenylphosphinito) difluoroborate was probably formed by hydrolysis of PClPh2 followed by reaction with BF4 in ethanol. The same complex was also prepared by hydrolysis of cis-[Co(Me(2)dtc)(2)(PHPh2)(2)]BF4 in a mixture of acetonitrile, methanol and water. The molecular structure and spectroscopic properties of complex 1 were compared with those of the corresponding Ph2POMe complex, cis-[Co(Me(2)dtc)(2)(Ph2POMe)(2)]BF4. (C) 2013 Elsevier B. V. All rights reserved.

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  • Efficient and eco-friendly syntheses of 1,5-benzothiazepines and 1,5-benzodiazepines catalyzed by [Hmim][NO<inf>3</inf>] under mild conditions

    Loghmani-Khouzani, H., Tamjidi, P., Mohammadpoor-Baltork, I., Yaeghoobi, M., Rahman, N.A., Khosropour, A.R., Moghadam, M., Tangestaninejad, S., Mirkhani, V., Habibi, M.H., Kashima, A., Suzuki, T.

    Journal of Heterocyclic Chemistry   51 ( 1 )   2014

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    DOI: 10.1002/jhet.1827

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  • Four-Electron Oxidative Dehydrogenation Induced by Proton-Coupled Electron Transfer in Ruthenium(III) Complex with 2-(1,4,5,6-Tetrahydropyrimidin-2-yl)phenolate

    Ryoji Mitsuhashi, Takayoshi Suzuki, Yukinari Sunatsuki

    INORGANIC CHEMISTRY   52 ( 17 )   10183 - 10190   2013.9

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    New rutheniurn(II or III) complexes with general formula [Ru(O-N)(bpy)(2)](n+) (O-N = unsymmetrical bidentate phenolate ligand; bpy = 2,2'-bipyridine) were synthesized, and their crystal structures and electrochemical properties were characterized. Ru-II complexes with, 2-(2-imidazolinyl)phenolate (Himn(-)) or 2-(1,4,5,6-tetrahydropyrimidin-2-yl)phenolate (Hthp(-)) could be deprotonated by addition of excess KO'Bu, although the deprotonated species were easily reprotonated by. exposure to air. Unlike these Run complexes, their Ru-III analogs showed interesting ligand oxidation reactions upon addition of bases. With Ru-III (Himn)(bpy)(2)](2+), two electron oxidation of Himn(-) and reduction of the Rum center resulted in conversion of the 2-irnidazolinyl group, to a 2-imidazolyl group. On the other hand, the corresponding Hthp- complex exhibited four electron oxidation of the ligand to form 2-(2-pyrirnidyl)phenolate (pym-). These aromatization reactions of imidazolinyl and 1,4,5,6-tetrahydropyrimidyl groups were also achieved by the electrochemically generated Rum complexes.'

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  • Hydrogen-bonding interactions, geometrical selectivity and spectroscopic properties of cobalt(III) complexes with unsymmetrical tridentate amine-amidato-phenolato type ligands

    Ryoji Mitsuhashi, Takayoshi Suzuki, Yukinari Sunatsuki, Masaaki Kojima

    Inorganica Chimica Acta   399   131 - 137   2013.4

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    Four cobalt(III) complexes with the formula of [Co(Ln)2] - bearing tridentate amine-amidato-phenolato-type ligands (Ln: n = 1-4) were synthesized. All of the complexes were characterized by 1H NMR spectroscopy and X-ray analysis. The geometrical selectivity was found to depend on the flexibility of the amine-amidato chelate in combination with the planar 2-oxybenzamido 6-membered chelate
    that is, the amine-amidato 5-membered chelate took the mer-type geometry, and the 6-membered chelate took the fac-type geometry. In most of the mer-type complexes, intermolecular double hydrogen bonds via amidato(O) and amino group were selectively formed between their enantiomeric pairs of mononuclear complexes. In the case of two chiral ligands {L22- = 2-amino-1-(2-oxybenzamido)propane
    L32- = trans-1-amino-2-(2-oxybenzamido)cyclohexane}, [Co(L3)2]- showed diastereoselectivity while [Co(L2)2]- did not. Furthermore, PPh4[Co(L1)2] (L12- = 2-amino-1-(2-oxybenzamido)-2-methylpropane) showed an apparent solvatochromic behavior in several solvents. Although the molecular structures of [Co(L2 or L3)2]- are quite similar to that of [Co(L1) 2]-, these complexes did not exhibit such a solvatochromic behavior. © 2013 Elsevier B.V. All rights reserved.

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  • Comparison of ancillary ligand effects between 2,2 '-bipyridine and 2-(2 '-pyridyl)phenyl in the linkage and bridging isomerism of 5-methyltetrazolato iridium(III) and/or rhodium(III) complexes

    Asuka Takayama, Takayoshi Suzuki, Miyu Ikeda, Yukinari Sunatsuki, Masaaki Kojima

    DALTON TRANSACTIONS   42 ( 40 )   14556 - 14567   2013

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    Several new iridium(III) and rhodium(III) complexes bearing 5-methyltetrazolate (MeCN4-) have been prepared, and their structures in the crystals and in solution have been determined by X-ray analysis and by NMR spectroscopy, respectively. In the crystals of the mononuclear complexes, kappa N-2-coordination of MeCN4- was observed when the ancillary ligand was 2,2'-bipyridine (bpy): [Cp*M(bpy)(MeCN4-kappa N-2)]PF6 (Cp* = eta(5)-C5Me5; M = Ir: 1 and Rh: 2), while the corresponding complexes with 2-(2'-pyridyl)phenyl (ppy(-)) were confirmed to have the kappa N-1-coordination of MeCN4-: [Cp*M(ppy)(MeCN4-kappa N-1)] (M = Ir: 3 and Rh: 4). In solution, the Ir-III complexes (1 and 3) were robust enough to maintain their molecular structures, but the Rh-III complexes (2 and 4) existed as an equilibrium mixture of the kappa N-1- and kappa N-2-isomers. In addition to the Ir-III-Ir-III and Rh-III-Rh-III homodinuclear complexes bridged by MeCN4- (5-8), the corresponding heterodinuclear Ir-III-Rh-III complexes (9-12) were prepared using the mononuclear Ir-III complexes (1 and 3) as precursors. The molecular structures of these dinuclear complexes were also characterised. Interestingly, both of the heterodinuclear complexes comprised of Cp*M(bpy)(2+) and Cp*M'(ppy)(+) fragments, [Cp*M(bpy)(mu-MeCN4)M'(ppy)Cp*](PF6)(2) (M = Ir, M' = Rh: 10 and M = Rh, M' = Ir: 11), exhibited selective crystallisation of a specific mu-kappa N-1(M'-ppy):kappa N-3(M-bpy) isomer. In solution, the dinuclear complexes with a Rh-N(MeCN4) bond and more than one positive charge (6 and 9-11) showed a dissociation equilibrium, while monocationic MeCN4-bridged complexes (7, 8 and 12) were inactive for dissociation. Furthermore, the heterodinuclear complexes of 9-12, as well as the Rh-III-Rh-III complex of 8, exhibited a bridging isomerisation, which would proceed via a eta(2):eta(2)-intermediate without dissociation of Cp*M(bpy or ppy) fragments.

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  • Preparation, Crystal Structures, and Behavior in Solution of Cobalt(III) Complexes Containing 2-Cyanoethylphosphines: trans-[Co(Me2dtc)(2){P(CH2CH2CN)(n)Ph3-n}]BF4 (n=1-3; Me(2)dtc(-): N,N-Dimethyldithiocarbamate)

    Keiko Kihara, Takayoshi Suzuki, Masakazu Kita, Yukinari Sunatsuki, Masaaki Kojima, Hideo D. Takagi

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   85 ( 10 )   1160 - 1166   2012.10

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    A series of cobalt(III) complexes containing 2-cyanoethylphosphines, [Co(Me(2)dtc)(2){P(CH2CH2CN)(n)Ph3-n}(2)]BF4 {Me(2)dtc(-): N,N-dimethyldithiocarbamate; n =1 (1), 2 (2), and 3 (3)} have been prepared, and their molecular structures in the crystals and in solution have been characterized. X-ray analysis revealed that all complexes isolated as single-crystals were the trans-isomers. The Co-P bond lengths for the 2-cyanoethylphosphines in complexes 1-3 are almost invariant to the number of 2-cyanoethyl substituent groups. Unlike related complexes with other monodentate P-donor ligands, complexes 1-3 in solution showed dissociation and isomerization equilibriums, which were achieved immediately after dissolving the crystals. These characteristic features of the complexes would result from the weak sigma-donor and pi-acceptor abilities of 2-cyanoethylphosphines. Furthermore, mixing of complex 1 and NaN3 in acetonitrile gave cis-[Co(Me(2)dtc)(2)(N-3){P(CH2CH2CN)Ph-2}] quantitatively, and refluxing the mixture resulted in the phosphine-tetrazolate complex, [Co(Me(2)dtc)(2)(Ph2PCH2CH2CN4-(KP)-P-2,N-1)] (4).

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  • Crystal structure and spectroscopic properties of trans-dichlorobis(1,3-propane-diamine)chromium(III) perchlorate

    J. -H. Choi, A. Takayama, T. Suzuki

    JOURNAL OF STRUCTURAL CHEMISTRY   53 ( 2 )   397 - 402   2012.3

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    The crystal structure of trans-[Cr(tn)(2)Cl-2]ClO4 (tn = 1,3-propanediamine) is determined by a single-crystal X-ray diffraction study at 185 K. The Cr atom is in a slightly distorted octahedral environment coordinated by four nitrogen atoms of two tn ligands and two chlorine atoms in trans position. The orientations of two six-membered rings in the complex cation are in an anti chair-chair conformation with respect to each other. The mean Cr-N(tn) and Cr-Cl bond lengths are 2.0862(2) and 2.3112(6) respectively. The ClO (4) (-) anions have a slightly distorted tetrahedral geometry with Cl-O lengths and O-Cl-O angles influenced by the hydrogen bonding. The crystal packing is stabilized by several hydrogen bonds. The infrared and electronic absorption spectral properties are also described along with the results of X-ray crystallography.

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  • Synthesis, Spectroscopic Studies, Crystal Structure and Electrochemical Properties of New Cobalt(III) Complex Derived from 2-Aminophenol and 4-(Dimethylamino) Cinnamaldehyde: Nano-Sized Complex Thin Film Formation via Surface Layer-by-Layer Chemical Deposition Method

    Mohammad Hossein Habibi, Elahe Shojaee, Yuki Yamane, Takayoshi Suzuki

    JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS   22 ( 1 )   190 - 195   2012.1

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    New Schiff base (HL) ligand is prepared via condensation of 2-aminophenol and 4-(dimethylamino) cinnamaldehyde. The cobalt complex with the formula of [Co(L)(2)(MePy)(2)]PF6 is prepared in good yield from the reaction of the ligand with cobalt(II) acetate. The compounds were characterized by the analytical and spectroscopic methods. The ligand (HL) behaves as a bidentate ligand and coordinates to the cobalt ions via the nitrogen and oxygen atoms with mononuclear structure. The ligand (HL) has been structurally characterized by X-ray crystallography. There is O-H center dot center dot center dot N-H bond linking the molecules together. FT-IR spectra show that HL is coordinated to the cobalt ion in a mono-negative bidentate manner with ON donor sites of the azomethene N and deprotonated phenolic-OH. There are two methylpyridine molecules apically coordinated to Co(III) ion in octahedral environment. Electrochemical properties were investigated as metal centres in the dimethylformamide solvents. The Co(III) complex exhibit both irreversible reductive (CoIII/CoII; Epc, -1.24 V) and oxidative (CoII/CoIII; Epa, +0.79 V, respectively) responses in cyclic voltammetry. Thin film of nano-sized [M(L)(2)(MePy)(2)]PF6 complex was formed by surface layer-by-layer chemical deposition method. The formation of uniform thin films of nano-crystalline metal complex is dependent on metal and ligand concentrations.

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  • Conglomerate crystallization, chiral recognition and spin-crossover in a host-guest complex consisting of Fe-III complexes (host) and [Cr(ox)(3)](3-) (guest)

    Yukinari Sunatsuki, Sho Miyahara, Yuu Sasaki, Takayoshi Suzuki, Masaaki Kojima, Naohide Matsumoto

    CRYSTENGCOMM   14 ( 20 )   6377 - 6380   2012

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    A host-guest complex, [Fe-III(H3L)][Fe-III(L)][Cr-III(ox)(3)]center dot 3H(2)O (1), where H3L and L3- serve as hexadentate ligands, was prepared. In 1, three properties are united: the homochiral assembly of chiral [Fe-III(H3L)](3+) and [Fe-III(L)] into a conglomerate structure, the chiral recognition of the host Fe-III assembly to the guest [Cr-III(ox)(3)](3-) and the spin-crossover of [Fe-III(H3L)](3+).

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  • Syntheses, spectral, electrochemical and thermal studies of mononuclear manganese(III) complexes with ligands derived from 1,2-propanediamine and 2-hydroxy-3 or 5-methoxybenzaldehyde: Self-assembled monolayer formation on nanostructure zinc oxide thin film

    Mohammad Hossein Habibi, Elham Askari, Mehdi Amirnasr, Ahmad Amiri, Yuki Yamane, Takayoshi Suzuki

    SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY   79 ( 3 )   666 - 671   2011.8

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    Mononuclear Mn(III) complexes have been prepared via the Mn(II) reaction of an equimolar of Schiff-bases derived from reaction of 2-hydroxy-3-methoxybenzaldehyde or 2-hydroxy-5-methoxybenzaldehyde with 1,2-diaminopropane. Axial ligands L include: pyridine (py) and H2O. The resulting complexes have been characterized by FT-IR and UV-vis spectroscopy. The crystal structures of the complexes were determined and indicate that in the solid state the complex adopts a slightly distorted octahedral environment of the imine N and hydroxo O with the two axial ligands. The electrochemical reduction of these complexes at a glassy carbon electrode in acetonitrile solution indicates that the first reduction process corresponding to Mn-III-Mn-II is electrochemically quasi-reversible. Thermal stability of these complexes was determined by TG and DTG. Layers of these complexes were formed on nanostructure zinc oxide thin film and a red shift was observed when zinc oxide thin film is modified by complex. (C) 2011 Elsevier B.V. All rights reserved.

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  • Reactivities of the N-Atom-inserted Ligands, NSC(NR2)S2- and SN=C(NR2)S2-, in Iridium(III) Complexes

    Keita Ariyoshi, Takayoshi Suzuki, James M. Mayer, Masaaki Kojima

    CHEMISTRY LETTERS   40 ( 8 )   831 - 833   2011.8

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    Reactions of [Cp*Ir{NSC(NR2)S}] (Cp* = eta(5)-C5Me5, R = Me or Et,) with alkyl halides (MeI or BnBr) in acetonitrile gave the N-alkylated products, [Cp*Ir{R'NSC(NR2)S}] (R' = Me or Bn). These complexes readily reacted with PPh3 to give adducts. In contrast, [Cp*Ir{SN=C(NR2)S}] formed their PPh3 adducts, which gave thermally stable S-alkylated products by reactions with alkyl halides.

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  • DFT study of molecular structure of 2-oxo-1,2,3,4-tetrahydropyrimidin-5-carboxamides and their corresponding oxidized forms 2-oxo-1,2-dihydropyrimidin-5-carboxamides

    Hamid Reza Memarian, Hassan Sabzyan, Mousa Soleymani, Mohammad Hossein Habibi, Takayoshi Suzuki

    JOURNAL OF MOLECULAR STRUCTURE   998 ( 1-3 )   91 - 98   2011.7

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    Density functional theory (DFT) at B3LYP/6-31++G** level has been applied to study structural, electronic and bonding characteristics of some 2-oxo-1,2,3,4-tetrahydropyrimidin-5-carboxamides (THPMs) and their oxidized forms 2-oxo-1,2-dihydropyrimidin-5-carboxamides (DHPMs). Results of this study show that for these THPMs, the six-member ring adopts a boat conformation with a pseudo-axial orientation of the C(4)-substituent. Experimental and theoretical (1)H NMR data obtained for THPMs and their corresponding oxidized forms (DHPMs) are correlated. Thermochemical analysis on THPMs and their corresponding oxidation products show that the oxidation reaction of THPMs to DHPMs is endothermic. (C) 2011 Elsevier B.V. All rights reserved.

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  • Geometric Selectivity, Hydrogen-Bonding Interaction, and Solvatochromism of Bis{N-(aminoalkyl)salicylamidato(2-)}cobaltate(III)

    Ryoji Mitsuhashi, Takayoshi Suzuki, Yukinari Sunatsuki, Masaaki Kojima

    CHEMISTRY LETTERS   40 ( 7 )   696 - 698   2011.7

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    Cobalt(HI) complexes with N-(aminoalkyl)salicylamide dianions, Ln(2-) (n = 1-4), have been prepared and their molecular and crystal structures have been determined. The geometric (mer- or fac-) selectivity of [Co(Ln)(2)](-) complexes was dependent on the number of the amine-amidato chelate ring member. Intermolecular homochiral hydrogen-bonds and solvatochromic behavior of the complexes were also observed.

    DOI: 10.1246/cl.2011.696

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  • Orange and Yellow Crystals of Copper(I) Complexes Bearing 8-(Diphenylphosphino)quinoline: A Pair of Distortion Isomers of an Intrinsic Tetrahedral Complex

    Takayoshi Suzuki, Hiroshi Yamaguchi, Akira Hashimoto, Koichi Nozaki, Mototsugu Doi, Naoya Inazumi, Noriaki Ikeda, Satoshi Kawata, Masaaki Kojima, Hideo D. Takagi

    INORGANIC CHEMISTRY   50 ( 9 )   3981 - 3987   2011.5

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    The tetrafluoroborate salt of bis{8-(diphenylphosphino)quinoline}copper(I), [Cu(Ph(2)Pqn)(2)]BF(4), afforded orange prismatic (2O) or yellow columnar (2Y) crystals, dependent on the solvent and concentration of the recrystallization solution used. X-ray analysis revealed that crystals of 2O and 2Y had the same composition and exhibited different crystal systems: 2O was triclinic, with space group P (1) over bar and Z = 2, and 2Y was monoclinic with space group P2(1)/c and Z = 4. In these crystals, the tetrahedral copper(I) complex exhibited a strong "rocking distortion" toward a trigonal pyramidal coordination geometry (by a slide translation of one of the unsymmetrical bidentate chelating ligands along the tetrahedral edge). In addition, both the 2O and 2Y complexes showed a "flattening distortion", meaning that the dihedral angle between the two chelate planes were off-perpendicular and oriented toward opposite directions, which resulted in a pair of distortion isomers: syn clinal (sc: 2O) and anti clinal (ac: 2Y). (31)P CP-MAS NMR spectroscopy indicated that 2O and 2Y could be distinguished. Both isomers exhibited inequivalent P atoms, but a larger difference in chemical shift was observed in 2Y. TD-DFT calculations reproduced the difference in spectra between the orange- and yellow-colored complexes, which originated from metal-to-ligand charge-transfer transitions.

    DOI: 10.1021/ic1024636

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  • A Polymorphic Platinum(II) Complex: Yellow, Red, and Green Polymorphs and X-ray Crystallography of [Pt(fdpb)Cl] [Hfdpb=1,3-Bis(5-trifluoromethyl-2-pyridyl)benzene]

    Yuta Nishiuchi, Asuka Takayama, Takayoshi Suzuki, Kazuteru Shinozaki

    EUROPEAN JOURNAL OF INORGANIC CHEMISTRY   2011 ( 11 )   1815 - 1823   2011.4

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    We investigated polymorphism in [Pt(fdpb) Cl] [Hfdpb = 1,3-bis(5-trifluoromethyl-2-pyridyl)benzene]. The following polymorphs of the complex were crystallized: yellow [Form Y; orthorhombic, Pca2(1), a = 23.4336(14) angstrom, b = 4.6377(2) angstrom, c = 15.7845(9) angstrom, Z = 4], red [Form R; monoclinic, C2/c, a = 21.3619(12) angstrom, b = 13.5629(7) angstrom, c = 13.6974(6) angstrom, beta = 122.301(2)degrees, Z = 8], and dark green [Form G; monoclinic, P2(1)/a, a = 6.7953(4) angstrom, b = 18.2519(12) angstrom, c = 13.5199(8) angstrom, beta = 96.039(2)degrees, Z = 4]. The yellow color of Form Y was due to the influence of stacking on the pi,pi* absorption of the Pt molecule; the red color of Form R originated from a MMLCT absorption due to Pt-Pt interactions in a closely stacked dimer; and the dark green of Form G was attributed to the absorption of a linear array of Pt-II complexes. The polymorphs emitted luminescence at around 550 (Form Y), 670 (Form R), and 750 nm (Form G). Mechanical grinding of the crystals changed the polymorphs from the crystalline to the amorphous phase; the emission spectra of ground samples of Forms Y and R, observed at 750 nm, were identical. When the amorphous solid was heated to around 500 K, the emission spectrum was blueshifted to 670 nm due to a phase transition from amorphous to crystalline. Heating also caused a crystal-crystal transformation; phase transitions from Form G to Form R and Form R to Form Y proceeded at 430-470 and 540-560 K, respectively.

    DOI: 10.1002/ejic.201001359

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  • A single tripodal ligand stabilizing three different oxidation states (II, III, and IV) of manganese

    Yukinari Sunatsuki, Yukana Kishima, Tamami Kobayashi, Tomoka Yamaguchi, Takayoshi Suzuki, Masaaki Kojima, J. Krzystek, Markku R. Sundberg

    CHEMICAL COMMUNICATIONS   47 ( 32 )   9149 - 9151   2011

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    A series of mononuclear Mn-II, Mn-III, and Mn-IV complexes was prepared using a single tripodal ligand (H3L). Addition of a cation (NH4+, K+, Na+) to [(MnL)-L-III] showed a pronounced effect on the redox potentials. Different variants of Jahn-Teller distortion, axial elongation and compression, were observed in the Mn-III complexes.

    DOI: 10.1039/c1cc12418h

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  • Syntheses and crystal structures of mononuclear and dinuclear (pentamethylcyclopentadienyl)iridium(III) complexes containing 2-mercaptobenzimidazole

    Mai Kotera, Takayoshi Suzuki

    INORGANICA CHIMICA ACTA   363 ( 13 )   3602 - 3605   2010.10

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    A reaction of [Cp*IrCl(2)](2) {Cp* = eta(5)-C(5)(CH(3))(5)}and 2-mercaptobenzimidazole (H(2)bimt) in methanol in a 1:2 molar ratio gave a yellow complex of [Cp*IrCl(2)(H(2)bimt)]center dot CH(3)OH (1). In compound 1 the H(2)bimt acts as a monodentately S-donating (kappa S) ligand. A similar reaction of [Cp*IrCl(2)](2) and H(2)bimt in the presence of NaOCH(3) (molar ratio of 1:2:2) gave an orange product (2) on addition of excess amount of NH(4)PF(6). Compound 2 was composed of an unsymmetrical dinuclear complex cation, [(Cp*IrCl)(2)(mu-Hbimt)(mu-H(2)bimt)](+), a PF(6) anion, and water molecules of crystallization. In the complex cation, H(2)bimt bridges two Ir(III) centers by S atom in the mu-kappa S:kappa S mode, while the monodeprotonated Hbimt ligand bridges via S and N atoms in the mu-kappa S:kappa N(1) mode. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.ica.2010.05.053

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  • Structures and spin states of mono- and dinuclear iron(II) complexes of imidazole-4-carbaldehyde azine and its derivatives

    Yukinari Sunatsuki, Ryohei Kawamoto, Kunihiro Fujita, Hisashi Maruyama, Takayoshi Suzuki, Hiroyuki Ishida, Masaaki Kojima, Seiichiro Iijima, Naohide Matsumoto

    COORDINATION CHEMISTRY REVIEWS   254 ( 15-16 )   1871 - 1881   2010.8

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    Mononuclear [Fe(H(2)L(R))(2)]X(2) (R = H, 2-Me, 5-Me, 2-Et-5-Me; X = ClO(4), BF(4)) and dinuclear [Fe(2)(H(2)L(R))(3)]X(4) complexes containing imidazole-4-carbaldehyde azine (H2LH) and its derivatives prepared by condensation of 4-formylimidazole, 2-methyl- or 5-methyl-4-formylimidazole, or 2-ethy1-4-methy15-formylimidazole, with hydrazine in a 2:1 mole ratio in methanol, were prepared and their magnetostructural relationships were studied. In the mononuclear complexes, H(2)L(R) acts as an unsymmetrical tridentate ligand with two imidazole nitrogen atoms and one azine nitrogen atom, while in the dinuclear complexes, H(2)L(R) acts as a dinucleating ligand employing four nitrogen atoms to form a triple helicate structure. At room temperature, [Fe(2)(H(2)L(H))(3)](ClO(4))(4) and [Fe(2)(H(2)L(2)-me)(3)](ClO(4))(4) were in the high-spin (HS) and low-spin (LS) states, respectively. The results are in accordance with the ligand field strength of H(2)L(2-Me) with electron-donating methyl groups being stronger than H(2)L(H), with the order of the ligand field strengths being H(2)L(2-me) &gt; H(2)L(H). However, in the mononuclear [Fe(H(2)L(H))(2)](ClO(4))(2) and [Fe(H(2)L(2-Me))(2)](ClO(4))(2) complexes, a different order of ligand field strengths, H(2)L(H) &gt; H(2)L(2-Me), was observed because [Fe(H(2)O)(2)](ClO(4))(2) was in the LS state while Fe(H(2)L(2-me))(2)](ClO(4))(2) was in the HS state at room temperature. X-ray structural studies revealed that the interligand steric repulsion between a methyl group of an H(2)L(2-Me) ligand and the other ligand in Fe(H(2)L(2-Me))(2)](ClO(4))(2) is responsible for the observed change in the spin state. The same is true for [Fe(H(2)L(2-Et-5-Me))2](ClO(4))(2), while [Fe(H(2)L(5-Me))2](ClO(4))(2) does not involve such a steric congestion and stays in the LS state over the temperature range 5-300K. Two kinds of crystals (polymorphs) were isolated for [Fe(2)(H(2)L(H))(3)](BF(4))(4) and [Fe(2)(H(2)L(2-Et-5-Me))(3)](ClO(4))(4), and they exhibited different magnetic behaviors. (C) 2009 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.ccr.2009.11.016

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  • Novel Counter Anion Effects of Added [Co(NH3)(6)]X-3 (X- = Cl-, Br-, I-, or ClO4-) on Surface Tension Reduction in Aqueous Solutions of Anionic Surfactants

    Sieng Sovanna, Takayoshi Suzuki, Masaaki Kojima, Satoshi Tachiyashiki, Masakazu Kita

    CHEMISTRY LETTERS   39 ( 3 )   306 - 307   2010.3

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    Surface tension of anionic surfactant solutions, sodium dodecyl sulfate (SDS) or sodium dodecylbenzenesulfonate (SBS) decreases remarkably in the presence of [Co(NH3)(6)]X-3 (2.50 mM) (X- = Cl-, Br-, I-, or ClO4-) at 298 K, depending on the kind of counter anion X. The magnitude of reduction is in the order ClO4- &gt; I- &gt; Br- &gt; Cl- for SDS solutions and ClO4- &gt; Cl- &gt; Br- &gt; I- for SBS solutions at 0.03 mM surfactant concentrations.

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  • N,N '-Bis(3-nitrobenzylidene)-2,2 '-[2-(3-nitrophenyl)imidazolidine-1,3-diyl]diethanamine

    Mohammad Hossein Habibi, Narges Abarghooei-Shirazi, Yuki Yamane, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   66 ( 3 )   O501 - U3985   2010.3

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    The title compound, C27H27N7O6, a Schiff base, was synthesized by the reaction of triethylenetetramine with 3-nitrobenzealdehyde. There are two independent molecules in the asymmetric unit. The central aromatic ring in one molecule makes dihedral angles of 23.99 (7) and 20.06 (6)degrees with the two terminal rings; for the second molecule, these angles are 26.14 (6) and 24.64 (6)degrees.

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  • Luminescence Change by the Solvent of Crystallization, Solvent Reorganization, and Vapochromism of Neutral Dicyanoruthenium(II) Complex in the Solid State

    Taichi Abe, Takayoshi Suzuki, Kazuteru Shinozaki

    INORGANIC CHEMISTRY   49 ( 4 )   1794 - 1800   2010.2

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    The "solvent effect" on the solid-state luminescence of a neutral complex, [Ru(dbb)(2)(CN)(2)] (dbb = 4,4'-di-tert-butyl-2,2'-bipyridine), was presented. The crystals of this complex showed a variety of luminescence color from orange to dark-red, depending on the acceptor number of the solvent included in the crystal as a solvent of crystallization. The luminescence change was very similar to the solvatochromism in solution, which was attributed to the local donor-acceptor interaction between the CN group and the solvent molecules. The dynamic shift observed in the transient emission spectrum of the crystalline powder was accounted for by the solvent molecule reorganization. X-ray crystallography of [Ru(dbb)(2)(CN)(2)]center dot 3(CH3)(2)CO showed the complex molecule having an approximate C-2 symmetry and very weak interactions between the acetone molecules and the CN groups. A three-dimensional network constructed by acetone molecules was observed in the hydrophobic space consisting of t-butyl groups in dbb ligands. A thin film of the complex showed vapochromic behavior such that the luminescence changed depending on the solvent of crystallization. This suggests a capability for organic molecule discrimination using the complex in the solid state.

    DOI: 10.1021/ic9021596

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  • Preparation, Crystal Structures, and Spectroscopic and Redox Properties of Nickel(II) Complexes Containing Phosphane-(Amine or Quinoline)-Type Hybrid Ligands and a Nickel(I) Complex Bearing 8-(Diphenylphosphanyl)quinoline

    Akira Hashimoto, Hiroshi Yamaguchi, Takayoshi Suzuki, Kazuo Kashiwabara, Masaaki Kojima, Hideo D. Takagi

    EUROPEAN JOURNAL OF INORGANIC CHEMISTRY   2010 ( 1 )   39 - 47   2010.1

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    Nickel(II) complexes containing P-N-type bidentate hybrid ligands of 2-aminoethylphosphanes (RR&apos;Pea; RR&apos; = Ph(2) or MePh) or 8-quinolylphosphanes (RR&apos;Pqn), namely [Ni(P-N)(2)]-(BF(4))(2) [P-N = Ph(2)Pea (1), MePhPea (2), Ph(2)Pqn (3), or MePhPqn (4)] have been prepared, and their structural, spectroscopic, and electrochemical properties determined. The crystal structure analysis indicates that the 2-aminoethyl-phosphane complexes (1 and 2) have a square-planar coordination geometry around the Ni(II) center with a cis(PP) configuration, whereas the 8-quinolylphosphane complexes (3 and 4) exhibit a severe tetrahedral distortion because of the steric repulsion between the ortho-H atoms in the mutually cis-positioned quinolyl rings. Complexes I and 2 maintain their diamagnetic square-planar four-coordinate structure on acetonitrile solution, whereas complexes 3 and 4 show paramagnetic behavior. Spectroscopic and electrochemical measurements suggest that the ligand-field strengths of these four P-N-type ligands increase in the order Ph(2)Pqn (3) &lt; MePhPqn (4) &lt; Ph(2)Pea (1) &lt; MePhPea (2). The Ph(2)Pqn complex 3 is readily reduced by Zn powder to afford the corresponding nickel(I) complex [Ni(Ph(2)Pqn)(2)]BF(4) (5). The crystal structure of complex 5 reveals that the Nil ion adopts a distorted tetrahedral coordination geometry with slightly longer (approximate to 0.05 angstrom) Ni-P and Ni-N bond lengths than those in the corresponding Ni(II) complex 3.

    DOI: 10.1002/ejic.200900767

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  • Homochiral column structure of rac- and Lambda-[M-III(tn)(3)]P3O9 (M = Co, Cr; tn=1,3-diaminopropane; P3O9 = cyclotriphosphate(3-)) produced by multiple hydrogen bonds

    Yukinari Sunatsuki, Sho Miyahara, Takayoshi Suzuki, Masaaki Kojima, Toshio Nakashima, Naohide Matsumoto, Frode Galsbol

    NEW JOURNAL OF CHEMISTRY   34 ( 12 )   2777 - 2784   2010

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    The crystal structures of rac- and Lambda-[M-III(tn)(3)]P3O9 center dot nH(2)O (M = Co, Cr; tn = 1,3-diaminopropane = trimethylenediamine; P3O9 = cyclotriphosphate(3-))were determined by single-crystal X-ray analyses. In rac-[Co(tn)(3)]P3O9 center dot 7.3H(2)O, the [Co(tn)(3)](3+) cations with the same absolute configuration (Delta or Lambda) and the P3O93- anions are alternately arrayed and connected by multiple NH center dot center dot center dot O hydrogen bonds to form a homochiral columnar structure. Adjacent homochiral columns with opposite chirality are connected by intercolumn hydrogen bonds to form a racemic pair of columns. The crystal structure of rac-[Cr(tn)(3)]P3O9 center dot 7.5H(2)O is similar to that of the Co complex; however, there exist two types of racemic pairs of columns. In the crystal of Lambda-[Co(tn)(3)]P3O9 center dot 2.5H(2)O, a pair of columns consisting of alternately stacked Lambda-[Co(tn)(3)](3+) cations and P3O93- anions are linked by hydrogen bonds. Neighboring column pairs are further linked by hydrogen bonds to form a three-dimensional (3-D) sheet structure. The crystal structure of Lambda-[Cr(tn)(3)]P3O9 center dot 2.5H(2)O is isomorphous with the Co complex. The circular dichroism (CD) spectra of aqueous solutions of Lambda-[M(tn)(3)]Br-3 (M = Co, Cr) change when P3O93- is added, and the changes were explained by ion pair formation through hydrogen bonds.

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  • Mononuclear Bis(tridentate)-Type and Dinuclear Triple Helicate Iron(II) Complexes Containing 2-Ethyl-5-methylimidazole-4-carbaldehyde Azine

    Yukinari Sunatsuki, Hisashi Maruyama, Kunihiro Fujita, Takayoshi Suzuki, Masaaki Kojima, Naohide Matsumoto

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   82 ( 12 )   1497 - 1505   2009.12

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    Mononuclear [Fe(H2L2-Et-5-Me)(2)](2+) and dinuclear [Fe-2(H2L2-Et-5-Me)(3)](4+) complexes, where H2L2-Et-5-Me denotes 2-ethyl-5-methylimidazole-4-carbaldehyde azine, were prepared and isolated as the perchlorate salts, and their structures and magnetic properties were studied. In file mononuclear complex, the ligand acts as ail unsymmetrical tridentate ligand with two imidazole nitrogen atoms and one azine nitrogen atom. The complex was in the HS state above 50 K. In the dinuclear complex, each ligand acts as a dinucleating ligand employing four nitrogen atoms to form a triple helicate structure. Two types of crystals, plates and blocks, were isolated for the dinuclear complex. The plate crystals exhibited a sharp spin transition, [LS-HS] &lt;-&gt; [HS-HS], with no [LS-LS] state being observed. The block crystals remained in the [HS-HS] state above 50 K.

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  • Bis[mu-2-(aminosulfanyl)pyridine(1-)]bis[(eta(5)-pentamethylcyclopentadienyl)iridium(III)] diiodide

    Yusuke Sekioka, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   65 ( 10 )   M1229 - +   2009.10

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    In the title dinuclear iridium(III) complex, [Ir-2(C10H15)(2)-(C5H5N2S)(2)]I-2, the iridium(III) atoms are bridged by 2-(aminosulfanyl) pyridine(1-) [(2-py)SNH] ligands in a mu-(2-py) SNH-kappa N-2(py),N(NH):kappa N(NH) mode. The dinuclear complex cation lies on a crystallographic inversion center, resulting in a planar Ir2N2 ring with an Ir-N(py) bond length of 2.085 (9) angstrom and bridging Ir-N(NH) bonds of 2.110 (9) and 2.113 (9) angstrom. The two (2-py) S units have mutually anti configurations with respect to the Ir2N2 ring

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  • Structures and Spin States of Bis(tridentate)-Type Mononuclear and Triple Helicate Dinuclear lron(II) Complexes of Imidazole-4-carbaldehyde azine

    Yukinari Sunatsuki, Ryohei Kawamoto, Kunihiro Fujita, Hisashi Maruyama, Takayoshi Suzuki, Hiroyuki Ishida, Masaaki Kojima, Seiichiro Iijima, Naohide Matsumoto

    INORGANIC CHEMISTRY   48 ( 18 )   8784 - 8795   2009.9

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    Mononuclear [Fe(H(2)L(R))(2)](2+) and dinuclear [Fe(H(2)L(R))(3)](4+) (R = H, 2-Me, 5-Me) complexes containing the new imidazole-4-carbaldehyde azine ligand (H(2)L(H)) and its derivatives (H(2)L(2-Me) and H(2)L(5-Me)) prepared from the condensation reaction of 4-formylimidazole or 2-methyl- or 5-methyl-4-formylimidazole with hydrazine (2:1) were prepared, and their magnetostructural relationships were studied. In the mononuclear complexes, H(2)L(R) acts as an unsymmetrical tridentate ligand with two imidazole nitrogen atoms and one azine nitrogen atom, while in the dinuclear complexes, H(2)L(R) acts as a dinucleating ligand employing four nitrogen atoms to form a triple helicate. At room temperature, [Fe(2)(H(2)L(H))(3)](CIO(4))(4) and [Fe(2)(H(2)L(2-Me))(3)](CIO(4))(4) were in the high-spin (HS) and low-spin (LS) states, respectively. The results are in accordance with the ligand field strength of H(2)L(2-Me) with electron-donating methyl groups being stronger than H(2)L(H), with the order of the ligand field strengths being H(2)L(2-M) (e)&gt; H(2)L(H), However, in the mononuclearjFe(H(2)L(H))(2)](CIO(4))(2) and [Fe(H(2)L(2-Me))(2)](CIO(4))(2) complexes, a different order of Iigand field strengths, H(2)L(H) &gt; H(2)L(2-Me), was observed because [Fe(H(2)L(H))(2)] (CIO(4))(2) was in the LS state while [Fe(H(2)L(2-Me))(2)](CIO(4))(2) was in the HS state at room temperature. X-ray structural studies revealed that the interligand steric repulsion between a methyl group of an H(2)L(2-Me) ligand and the other ligand in [Fe(H(2)L(2-Me))(2)](CIO(4))(2) is responsible for the observed change in the spin state. Two kinds of crystals, needles and blocks, were isolated for [Fe2(H(2)L(H))(3)](BF(4))(4), and both exhibited a sharp spin transition, [LS-HS] &lt;-&gt; [HS-HS], The spin transition of the block crystals is more abrupt with a hysteresis, T(c)up arrow = 190 K and T(c)down arrow = 183 K with Delta T= 7 K.

    DOI: 10.1021/ic900977m

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  • Bis{mu-4,4 '-dimethoxy-2,2 '-[propane-1,2-diylbis(nitrilomethylidyne)]diphenolato}bis({4,4 '-dimethoxy-2,2 '-[propane-1,2-diylbis(nitrilomethylidyne)]diphenol}manganese(III)) bis(hexafluoridophosphate)

    Mohammad Hossein Habibi, Elham Askari, Reza Mokhtari, Morteza Montazerozohori, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   65 ( 8 )   M1004 - U1656   2009.8

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    In the title complex, [Mn-2(C19H2ON2O4)(2)(C19H22N2O4)(2)](PF6)(2), the Mn-III ion is coordinated by two O [Mn-O = 1.855 (2) and 1.887 (2) angstrom] and two N [Mn-N = 1.982 (3) and 1.977 (3) angstrom] atoms from the tetradentate Schiff base ligand and a coordinated axial ligand [Mn-O = 2.129 (2) angstrom]. The centrosymmetric dimer contains two Jahn-Teller-distorted Mn-III ions, each in a nearly octahedral geometry, connected through two phenolate bridges from two ligands. There are two stereogenic centers. The methyl group and the H atom attached to the middle propane C atom are disordered over two positions with occupancy factors in the ratio 0.58:0.42. The crystal is therefore a mixture of two diasteroisomers, viz. RS/SR and RR/SS. In the axial ligand, the two benzene rings form a dihedral angle of 56.97 (5)degrees and the dihedral angle between the two MnNC3O chelate rings is 2.98 (12)degrees

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  • 2,2 &apos;-[(E,E)-1,1 &apos;-(2,2-Dimethylpropane-1,3-diyldinitrilo)diethylidyne]diphenol

    Morteza Montazerozohori, Mohammad Hossein Habibi, Ahmad Hojjati, Reza Mokhtari, Yuki Yamane, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   65 ( 7 )   01662 - U3191   2009.7

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    The title Schiff base, C(21)H(26)N(2)O(2), contains two intramolecular O-H center dot center dot center dot N hydrogen bonds between the hydroxyl groups and the nearest imine N atoms, each leading to a six-membered ring. Weak C-H center dot center dot center dot O hydrogen bonds result in a ladder network running along the a axis. In addition, intermolecular C-H center dot center dot center dot pi interactions serve to stabilize the extended structure.

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  • {4,4 &apos;-Dimethoxy-2,2 &apos;-[2,2-dimethylpropane-1,3-diylbis(nitrilomethylidyne)]diphenolato}nickel(II)

    Morteza Montazerozohori, Mohammad Hossein Habibi, Reza Mokhtari, Yuki Yamane, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   65 ( 7 )   M703 - U170   2009.7

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    In the title complex, [Ni(C(21)H(24)N(2)O(4))], the Ni(II) ion has a slightly distorted square-planar geometry, coordinated by the two N and two O atoms of a new tetradentate Schiff base ligand. The dihedral angle between the planes of the two NiNC(3)O chelate rings is 14.37 (12)degrees.

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  • Crystal structures of (azido)(pentamethylcyclopentadienyl)iridium(III) complexes containing various types of bidentate ligands

    Takayoshi Suzuki, Mai Kotera, Asuka Takayama, Masaaki Kojima

    POLYHEDRON   28 ( 11 )   2287 - 2293   2009.7

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    Several (azido)iridium(III) complexes having a pentamethylcyclopentadienyl (Cp*) group, [Cp*Ir(N(3))(2)(Ph(2)Ppy-kappa P)] (1: Ph(2)Ppy = 2- diphenylphosphinopyridine), (Cp*Ir(N(3))(Ph(2)Ppy-kappa P,kappa N)]CF(3)SO(3) (2), [Cp*Ir(N(3))(dmpm)]PF(6) (3: dmpm = bis(dimethylphosphino)methane), [Cp*Ir(N(3))(Ph(2)Pqn)]PF(6)center dot CH(3)OH (4 center dot CH(3)OH: Ph(2)Pqn = 8- diphenylphosphinoquinoline), and [Cp*Ir(N(3))(pybim)] (5: Hpybim = 2-(2- pyridyl)benzimidazole) have been prepared and their crystal structures have been analyzed by X-ray diffraction. In complex 1, the Ph(2)Ppy ligand is only coordinated via the P atom (-kappa P), while in 2 it acts as a bidentate ligand through the P and N atoms (-kappa P,kappa N) to form a four-membered chelate ring. Comparing the structural parameters of the chelate ring in 2 with those of a similar five-membered chelate ring formed by ph(2)Pqn in 4, it became apparent that the angular distortion in the Ph(2)Ppy-kappa P,kappa N ring was remarkable, although the Ir-P and Ir-N bonds in the Ph(2)Pqn-kappa P,kappa N ring were not elongated very much from the corresponding bonds in the Ph(2)Pqn-kappa P,kappa N ring. In the pybim complex 5, the five-membered chelate ring was coplanar with the pyridine and benzimidazolyl rings. With the related (azido)iridium(III) complexes analyzed previously, comparison of the structural parameters of the Ir-N(3) moiety in (Cp*Ir(III)(N(3))(L-L&apos;)(+/0) complexes reveals all anomalous feature of the 2,2&apos;-bipyridyl (bpy) complex, [Cp*Ir(N(3))(bpy)]PF(6). (C) 2009 Elsevier Ltd. All rights reserved.

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  • {N,N &apos;-Bis[(E)-3-phenylprop-2-en-1-ylidene]propane-1,3-diamine-kappa N-2,N &apos;]dichloridocobalt(II)

    Morteza Montazerozohori, Mohammad Hossein Habibi, Mehdi Amirnasr, Keita Ariyoshi, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   65 ( 6 )   M617 - U222   2009.6

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    The Co-II atom in the title monomeric Schiff base complex, [CoCl2(C21H22N2)], is bonded to two Cl atoms and to two N atoms of the Schiff base ligand N,N &apos;-bis[(E)-3-phenylprop-2-en-1-ylidene]propane-1,3-diamine in a distorted tetrahedral geometry. The molecule has an idealised mirror symmetry, but is not located on a crystallographic mirror plane.

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  • Surface tension reduction (STR) in aqueous solutions of anionic surfactants with cobalt(III) complexes

    Sieng Sovanna, Takayoshi Suzuki, Masaaki Kojima, Satoshi Tachiyashiki, Masakazu Kita

    JOURNAL OF COLLOID AND INTERFACE SCIENCE   332 ( 1 )   194 - 200   2009.4

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    It has been observed that, at 25.0 +/- 0.1 degrees C, [Co(NH(3))(6)](ClO(4))(3), [Co(en)(3)](ClO(4))(3), [Co(bpy)(3)](ClO(4))(3), and [Co(phen)(3)](ClO(4))(3) in the regions of 1.25-5.00 mM aqueous solutions cause a significant surface tension reduction (STR) of water by the surfactants, sodium dodecylsulfate (SIDS) and sodium dodecylbenzenesulfonate (SBS), suggesting the formation of the 1:1 and 1:2 association complexes, {[complex](3+)(S(-))}(2+) and {[complex](3+)(S(-))(2)}(+) where [complex](3+) =[Co(NH(3))(6)](3+), [Co(en)(3)](3+), [Co(bpy)(3)](3+), or [Co(phen)(3)](3+), S(-) = DS(-) or BS(-). The effect of [Co(en)(3)](3+) on STR in SDS-water system is the largest due to a strong hydrophilic interaction between amino protons of [Co(en)(3)](3+) and sulfate oxygen atoms of DS(-). The effects of [Co(en)(3)](3+), [Co(bpy)(3)](3+), and [Co(phen)(3)](3+) on STR in SBS-water system are significant and almost same, meaning that the hydrophilic interaction between [Co(en)(3)](3+) and the sulfonate group is comparable to the hydrophobic interaction between [Co(bpy)(3)](3+) or [Co(phen)(3)](3+) and the phenyl group of BS(-). The Co(III) complexes of 1.25-5.00 mM are precipitated as {[complex](3+)(S(-))(3)} at 0.0295-0.173 mM of S(-). The precipitates, {[Co(bpy)(3)](3+)(S(-))(3)} and {[Co(phen)(3)](3+)(S(-))(3)} can be dissolved at higher molar ratio of [S(-)]/[complex(3+)] than 3.5 for SDS and 4.0 for SBS. This observation suggests that the aggregated premicelle [Co(bpy or phen)(3)](2)(DS)(7)(-) or aggregated premicelle [Co(bpy or phen)(3)](BS)(4)(-) is formed. (C) 2008 Elsevier Inc. All rights reserved.

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  • Remarkable chiral and luminescent properties of novel Yb(III) and Eu(III) complexes containing BINAPO ligand

    Md. Abdus Subhan, Yasuchika Hasegawa, Takayoshi Suzuki, Sumio Kaizaki, Yanagida Shozo

    INORGANICA CHIMICA ACTA   362 ( 1 )   136 - 142   2009.1

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    Lanthanide complexes are of great importance for their prospective applications in wide range of science and technology. Chiral lanthanide complexes can constitute stereo-discriminating probes in biological media, owing to the luminescent properties of the rare-earth ions. Sensitized emission with narrow bandwidth, having fast radiation rate and high emission quantum efficiency are the main perspective for synthesizing the complexes. Attention has been given on remarkable chirality with high dissymmetry factors (g = Delta epsilon(ext)/epsilon(max)) of the complexes. For this purpose, beta-diketonato ligands with chiral BINAPO (1,1'-binapthyl phosphine oxide) ligand were chosen to achieve the goal. The complexes [Ln(TFN)(3)-(S-BINAPO)](TFN = 4,4,4- trifluoro-1(2-napthyl)-1,3-butanedione), [Ln(HFT)(3)(S-BINAPO)] (HFT = 4,4,5,5,6,6,6-heptafluoro-1-(2-thienyl)-1,3-hexanedione) and [Ln(HFA)(3)(S-BINAPO)](hfa = hexafluoroacetylacetonate) (where Ln = Yb, Eu) were synthesized. The complex, [Eu(TFN)(3)(S-BINAPO)] gives strong red emission at 615 nm with narrow emission band (&lt; 10 nm) when excited by 465 nm light with quantum efficiency 86%. The dissymmetry factors (g = Delta epsilon(ext)/epsilon(max)) corresponding to the F-7(1) -&gt; D-5(0) transition at 590 nm is 0.091 for [Eu(TFN)(3)(S-BINAPO)] and for [Yb(hfa)(3)(S-BINAPO)](hfa = hexafluoroacetylacetonate) corresponding to the F-2(7/2) -&gt; F-2(5/2) transitions is 0.12, are among the largest values for both Eu and Yb complexes to date, respectively. The Eu complexes, [Eu(HFT)(3)(S-BINAPO)] and [Eu(TFN)(3)(S-BINAPO)] are found to be spontaneously emissive, showing bright red emission, when placed in sunlight or even in the laboratory when light is switched on. (c) 2008 Elsevier B.V. All rights reserved.

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  • Synthesis, structure, and electrochemistry of trans-[Co(III){(BA)(2)pn)(L)(2)]ClO(4) complexes

    Soraia Meghdadi, Mehdi Amirnasr, Mohammad H. Habibi, Ahmad Amiri, Fatemeh Ahmadi, Keiko Kihara, Takayoshi Suzuki, Hamid Reza Bijanzadeh

    TRANSITION METAL CHEMISTRY   33 ( 7 )   879 - 886   2008.10

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    The structure, spectroscopic, and electrochemical properties of [Co{(BA)(2)pn}(L)(2)]ClO(4) complexes, where (BA)(2)pn = N,N &apos;-bis(benzoylacetone)-1,3-propylenediimine dianion and the two ancillary ligands (L) are pyridine, py (1), and 4-methylpyridine, 4-Mepy (2), have been investigated. These complexes have been characterized by elemental analyses, IR, UV-Vis and (1)H-NMR spectroscopy. The crystal structure of [Co{(BA)(2)pn}(py)(2)]ClO(4) (1) has been determined by X-ray diffraction. The coordination geometry around cobalt(III) is best described as a distorted octahedron. The electrochemical reduction of these complexes at a glassy carbon electrode in acetonitrile solution indicates that the first reduction process corresponding to Co(III)-Co(II) is electrochemically irreversible, which is accompanied by the dissociation of the axial N(py)-cobalt bonds. This process becomes quasi-reversible upon the addition of excess py ligands. The second reduction step of Co(II/I) shows reversible behavior and is not influenced by the nature of the axial ligands.

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  • Structural versatility of 5-methyltetrazolato complexes of (eta(5)-pentamethylcyclopentadienyl)iridium(III) incorporating 2,2 '-bipyridine, N,N-dimethyldithiocarbamate, or 2-pyridinethiolate ligands

    Mai Kotera, Yusuke Sekioka, Takayoshi Suzuki

    INORGANIC CHEMISTRY   47 ( 9 )   3498 - 3508   2008.5

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    Several new mono- and dinuclear eta(5)-pentamethylcyclopentadienyl (Cp*) iridium(III) complexes bearing 5-methyltetrazolate (MeCN4-) have been synthesized and their molecular and crystal structures have been determined. For complexes incorporating 2,2'-bipyridine (bpy) or 1,10-phenanthroline (phen), both mononuclear kappa N-2-coordinated and dinuclear mu-kappa N-1:kappa N-3-bridging MeCN4 Complexes were obtained: [Cp*Ir(bpy or phen)(MeCN4-kappa N-2)]PF6 (1 or 3) and [{Cp*Ir(bpy or phen)}(2)(mu-MeCN4-kappa N-1:kappa N-3)](PF6)(3) (2 or 4), respectively. It was confirmed by X-ray analysis that the dinuclear complex in 2 has a characteristic structure with a pyramidal pocket constructed from a mu-kappa N-1:kappa N-3-bridging MeCN4- and two bpy ligands. In the case of analogous complexes with N,N-dimethyldithiocarbamate (Me(2)dtc(-)), yellow platelet crystals of mononuclear kappa N-1-coordinated complex, [Cp*Ir(Me(2)dtc)(MeCN4-kappa N-1)]center dot HN4CMe (5 center dot HN4CMe), and yellow prismatic crystals of dinuclear mu-kappa N-1:kappa N-4-bridging one, [{Cp*Ir(Me(2)dtc)}(2)(mu-MeCN4-kappa N-1: kappa N-4)]PF6 (6), were deposited. The kappa N-1- and kappa N-1:kappa N-4-bonding modes of MeCN4- in these complexes presumably arise from the compactness of the Me(2)dtc(-) coligand. 6 is the first example in which tetrazolates act as a mu-kappa N-1: kappa N-4-bridging ligand. Furthermore, the molecular and crystal structures of dinuclear complexes having mu-kappa S-2,N:kappa S-bridging 2-pyridinethiolate (2-Spy(-)) or 8-quinolinethiolate (8-Sqn(-)) ligands have been determined: [(Cp*Ir)(2)(mu-2-Spy or 8-Sqn-kappa S-2,N:kappa S)(2)] (7 or 8). These thiolato-bridging complexes were stable toward the addition of 5-methyltetrazole (HN4CMe), owing to the characteristic intramolecular stacking interaction between the pyridine or the quinoline rings. The 2-Spy complex of 7, however, reacted with an excess amount of Na(N4CMe), resulting in cleavage of the Ir-N(py) bond and coordination of MeCN4- in the mu-kappa N-2:kappa N-3-bridging mode: [(Cp*Ir)(2)(mu-2-Spy-kappa S:kappa S)(2)(mu-MeCN4-kappa N-2:kappa N-3)]PF6 (9). This bridging mode of MeCN4- was also observed in the triply bridging MeCN4 complex: [(Cp*Ir)(2)(mu-MeCN4-kappa N-2:kappa N-3)(3)]PF6 (10). In these various MeCN4 complexes, the structural parameters of the MeCN4 moiety were not perturbed by the difference in the bonding modes.

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  • Structural comparison of (pentamethylcyclopentadienyl) iridium(III) azido complexes containing potentially N,S-bidentate N-heterocyclic thiolates: 2-or 8-quinolinethiolate and benzimidazole-2-thiolate

    Mai Kotera, Yusuke Sekioka, Takayoshi Suzuki

    INORGANICA CHIMICA ACTA   361 ( 5 )   1479 - 1484   2008.4

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    The crystal structures of mononuclear (azido)( pentamethylcyclopentadienyl) iridium(III) complexes bearing 2- or 8-quinolinethiolate (n-Sqn(-)), [Cp* Ir(N-3)( n-Sqn)] {n = 2 (1) or 8 ( 2); Cp* = eta(5)- C5Me5} have been determined by X-ray analysis. The 2-Sqn complex, 1, acquires severe steric strains in the four-membered kappa(2) N, S chelate ring, while the 8-Sqn isomer, 2, forms a strain-free five-membered planar kappa(2) N, S chelate ring. It has also been revealed that the corresponding benzimidazole-2-thiolate (Hbimt(-)) complex, which was obtained similarly to the above n-Sqn complexes from [Cp* Ir(N-3)(2)] (2) and Na(Hbimt), takes an unsymmetrical dinuclear structure bridged by two Hbimt(-) ligands with different bonding modes, [Cp* Ir(N-3){mu(S: N-1)-Hbimt}{mu(S:S)-Hbimt}Ir(N-3)Cp*] MeOH (3). (c) 2007 Elsevier B. V. All rights reserved.

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  • Crystal structure and chiroptical spectra of sodium tetrakis (+)-hfbc Pr(III) complex

    Dai Shirotani, Takayoshi Suzuki, Kazuaki Yamanari, Sumio Kaizaki

    JOURNAL OF ALLOYS AND COMPOUNDS   451 ( 1-2 )   325 - 328   2008.2

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    The X-ray crystal structure of tetrakis (+)-hfbc Pr(III) complex, Na[Pr((+)-hfbc)(4)]center dot CH3CN, was compared with that of the corresponding Na-La complex with a pseudo-achiral dodecahedron, and the solution CD spectra were also discussed in the 4f-4f transition in consideration of the exciton CD couplet showing Delta-SAPR-8 configuration in CHCl3. (c) 2007 Published by Elsevier B.V.

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  • [2,6-Bis(5-methyl-2-pyridyl)phenyl-kappa N-3,C-1,N ']chloridoplatinum(II)

    Taichi Abe, Kazuteru Shinozaki, Noriaki Ikeda, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS   63 ( 10 )   M456 - M458   2007.10

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    In the title compound, [ Pt( C18H15N2) Cl], the Pt-II centre adopts a distorted square- planar coordination geometry due to the pincer- type monoanionic N - C - N tridentate ligand. The planar complexes stack via pi - pi interactions to form twodimensional accumulated sheets. This packing pattern is in contrast to that in related pincer- type N - C - N complexes, which exhibit a one- dimensional columnar stacking.

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  • {N,N '-Bis[3-(2-nitrophenyl)prop-2-enylidene]ethylenediamine-kappa N-2,N '}iodido(triphenylphosphane-kappa P)copper(I)

    Mohammad Hossein Habibi, Arash Lalegani, Reza Mokhtari, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   63 ( 10 )   M2472 - U346   2007.10

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  • (Bromido)[N,N '-bis(2-nitrocinnamaldehyde)ethylenediamine](triphenylphosphine)copper(I)

    Mohammad Hossein Habibi, Arash Lalegani, Reza Mokhtari, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   63 ( 10 )   M2479 - U421   2007.10

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  • Azido{N,N '-bis[3-(2-nitrophenyl)prop-2-enylidene] ethylenediamine}(triphenylphosphine)copper(I) chloroform solvate

    Mohammad Hossein Habibi, Arash Lalegani, Reza Mokhtari, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   63 ( 10 )   M2580 - U1316   2007.10

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  • Magnetic interactions in a series of paramagnetic Ln(III) complexes with a chelated imino nitroxide radical

    Toshiaki Tsukuda, Takayoshi Suzuki, Sumio Kalzaki

    POLYHEDRON   26 ( 13 )   3175 - 3181   2007.8

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    The magnetic interactions in a new series of isostructural imino nitroxide radical lanthanide(III) complexes, [Ln(hfac)(3)(IM2py)] (Ln = Gd-Yb: IM2py = 2-(2'-pyridyl)-4,5-dihydro-4,4,5,5-tetramethyl-1H-imidazoline-l-oxy; hfac = 1, 1, 1, 5,5,5-hexafluoro-2,4-pentanedione), are examined by considering the intrinsic paramagnetic contribution of the Ln(III) ion from the corresponding [Ln(hfaC)3(pybzim)] with a diamagnetic pybzim(2-(2-pyridyl)benzimidazole) ligand; the Ln(III)-IM2py interaction being antiferromagnetic for the 4f(7) to 413 Ln(III) complexes and negligibly small for the other complexes. This series is the first example reverse to the previous cases for the series of Ln-Cu or Ln-aminoxyl(NIT) radical (4,5-dihydro-4,4,5,5-tetramethyl-IH-imidazoline-3-oxide-l-oxy) complexes, other than only a few examples of semiquinone Ln complexes. This reverse nature of the magnetic interaction, as compared with the NIT complexes, validates the empirical approach by O. Kahn et al. [Inorg. Chem. 38 (1999) 3692; J. Am. Chem. Soc. 122 (2000) 3413] in the spin-coupled systems for a series of Ln(III) complexes. (c) 2007 Elsevier Ltd. All rights reserved.

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  • Dibromido(eta(5)-pentamethylcyclopenta-dienyl)(5-phenyldibenzophosphole-kappa P)-iridium(III) dichloromethane solvate

    Mai Kotera, Takayoshi Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS   63 ( 7 )   M1818 - U463   2007.7

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    The title compound, [IrBr2(eta(5)-C10H15)(C18H13P)]center dot CH2Cl2, is the first example of an iridium(III) phosphole complex to be characterized by X-ray crystallographic analysis. The Ir-P bond length is 2.2828 (15) angstrom, which is shorter by 0.04 angstrom than that of the analogous PPh3 complex. This is indicative of the steric compactness of 5-phenyldibenzophosphole compared with PPh3. The dibenzophosphole portion of the ligand is nearly planar, and the planes of the dibenzophosphole units of neighbouring molecules are stacked on top of each other to form a dimer in the crystal structure. The closest C center dot center dot center dot C distances between the planes are similar to 3.9 angstrom.

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  • Synthesis and magneto-optical properties of a series of bis(beta-diketonato) Co(II) complexes with imino nitroxide radical chelate

    Terukazu Ishida, Kelichi Adachi, Satoshi Kawata, Takayoshi Suzuki, Akira Fuyuhiro, Sumio Kaizaki

    POLYHEDRON   26 ( 9-11 )   2013 - 2020   2007.6

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    A series of bis(4,4,4-trifluoro-1-R-1,3-butanedinato) Co(II) complexes with imino nitroxide radical(IM2py), [Co(RtfC)(2)(IM(2)py)] (R = trifluoromethyl, phenyl, naphthyl, thienyl), was prepared and characterized by the X-ray analysis which demonstrated the stereo-specific formation of the trans(CF3)-isomer with the trans disposition of the CF3 groups. The significant substituents effect on the UV-Vis spectra and magnetic properties were discussed in consideration of the inversion of the d pi(t(2g)) orbital levels leading to the orbital orthogonality or overlap with the SOMO pi* of IM2py in terms of the AOM parametrizations or spin-paring energy. (c) 2006 Elsevier Ltd. All rights reserved.

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  • Preparation and characterization of mixed-ligand cobalt(III) complexes containing (3-aminopropyl) dimethylphosphine (pdmp). Conformation of the six-membered pdmp chelate ring

    Takayoshi Suzuki, Katsuhiro Fujiiwara, Hideo D. Takagi, Kazuo Kashiwabara

    DALTON TRANSACTIONS   2007 ( 3 )   308 - 319   2007

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    Several new cobalt(III) complexes containing (3-aminopropyl) dimethylphosphine (pdmp) have been prepared, and their molecular structures have been determined. A dichloro complex of trans(Cl,Cl)-cis(P,P)-[CoCl2(pdmp)(2)]PF6 (1) was prepared from trans-[CoCl2(py)(4)]Cl center dot 6H(2)O and pdmp. X-Ray crystallography confirmed the (C-2)-chair(2) conformation of two six-membered pdmp chelate rings in 1, while the analogous 1,3-bis(dimethylphosphino) propane (dmpp) complex trans-[CoCl2(dmpp)(2)]ClO4 (3) exhibited the (D-2d)-twist(2) conformation. Substitution reactions of 1 for ethane-1,2-diamine (en), pentane-2,4-dionate (acac), and N,N-dimethyldithiocarbamate (dtc) gave the mixed-ligand tris(chelate)-type complexes of [Co(en)(2)(pdmp)]Cl-2(PF6) (5), [Co(acac)(pdmp)(2)](PF6)(2) (7), and [Co(dtc)(3-n)(pdmp)(n)](PF6)(n) [n = 1 (9) or 2 (10)], respectively. The conformer of the complex cation in 5 was assigned as lel center dot ob center dot chair by X-ray analysis. In the case of the acac complex 7, both trans(P,N) (7a) and trans(N,N) (7b) isomers were isolated, and the complex cations were characterized as syn-chair(2) and anti-chair(2) conformers, respectively, with respect to the six-membered pdmp chelate rings. These conformers coincide with the most stable ones anticipated by the DFT optimum geometry calculations. In the crystal structure of trans(P,N)-[Co(dtc)(pdmp)(2)](BPh4)(2) (10') one of the pdmp chelate rings adopted a skew-boat (twist) conformation, which reduced the intramolecular steric ring-ring interaction effectively. The DFT optimized geometries for several isomers and/or conformers of [CoCl2(pdmp)(2)](+) were compared.

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  • 鉄(VI)の八面体型錯体!

    鈴木孝義

    化学   62 ( 1 )   61 - 62   2007

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  • Sulfur-bonded 2-methylthiopyridine (2-MeSpy) complex of iridium(III). Crystal structure of [Cp*IrI2-(2-MeSpy-kappa S)] (Cp* = eta(5)-C5Me5)

    Yusuke Sekioka, Takayoshi Suzuki

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   79 ( 12 )   1897 - 1899   2006.12

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    A reaction of [Cp*lr(2-Spy)(N-3)] (Cp* = pentarnethylcyclopentadienyl; 2-Spy = 2-pyridinethiolate) with two equivalents of methyl iodide afforded the diiodo complex bearing 2-MeSpy, [Cp*lrl(2)(2-MeSpy)] (3). From X-ray crystallography and IR spectroscopy, the S atom of 2-MeSpy is coordinated to the metal ion in the solid state. In CD2Cl2, complex 3 exhibited a dissociation equilibrium of 2-MeSpy similar to the corresponding thioanisole complex of [Cp*lrl(2)(MeSPh)].

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  • cis-Bis[(3-aminopropyl)dimethyl-phosphine-kappa N-2,P]palladium(II) dichloride methanol solvate

    Takayoshi Suzuki, Atsushi Hasegawa, Hiroshi Yamaguchi, Kazuo Kashiwabara, Hideo D. Takagi

    ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS   62   M461 - M463   2006.10

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    In the title compound, cis-[Pd(C5H14NP)(2)]Cl-2.CH4O, the coordination geometry around the Pd-II center is distorted square planar, with a cis-P2N2 configuration of the two chelating (3-amino-prop-yl)dimethyl-phosphine (pdmp) ligands. The six-membered pdmp chelate rings adopt chair conformations, and pairing of the chairs designates the complex cation as a (C-s)-chair(2) conformer. The distances between the Pd-II center and the Cl- anions are greater than 4.5 angstrom, indicating no obvious inter-action.

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  • (5,16-Dimethyl-2,6,13,17-tetraazatricyclo-[14,4,0(1,18),0(7,12)]docosane-kappa N-4) dinitrato-copper(II) trihydrate

    Jong-Ha Choi, Takayoshi Suzuki, Sumio Kaizaki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   62   M2383 - M2385   2006.9

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    In the title compound, [Cu(NO3)(2)(C20H40N4)] center dot 3H(2)O, the Cu atom lies on a crystallographic inversion centre and has a distorted octahedral geometry, with four N atoms of the macrocyclic ligand in the equatorial positions and two O atoms of the axial nitrate ligands. The long axial Cu-O bond of 2.746 (2) angstrom may result from the Jahn-Teller effect. The macrocyclic ligand adopts the most stable trans-III configuration with the two six-membered rings in chair form and two five-membered rings in a gauche form.

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  • Novel configurational structures of sodium tetrakis(3-heptafluorobutylryl-(+)-camphorato) Ln(III) complexes with a trapped Na+ by Na+center dot center dot center dot FC interactions in the solid state and in solution

    Dai Shirotani, Takayoshi Suzuki, Sumio Kaizaki

    INORGANIC CHEMISTRY   45 ( 16 )   6111 - 6113   2006.8

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    For newly prepared sodium tetrakis( 3-heptafluorobutylryl-( +)-camphorato) Ln( III) complexes, the X-ray crystal analysis revealed an unprecedented pseudo-achiral dodecahedron ( DD-8 ( D-2d)), whereas in CHCl3 solution, the exciton CD and F-19 NMR spectra showed a novel chiral Delta-SAPR-8 ( C-4) configuration which is stereospecifically formed by a trapped Na+ ion with Na+center dot center dot center dot FC ( fluorocarbon) interactions.

    DOI: 10.1021/ic0606633

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  • trans-Bis(O-ethylxanthato)bis(triphenylphosphine)ruthenium(III) hexafluorophosphate monohydrate

    Y Ohuchi, K Noda, T Suzuki, K Kashiwabara, HD Takagi

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   62   M1077 - M1078   2006.5

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    In the monoclinic crystal structure of the title compound, trans-[ Ru( C3H5OS2)(2)( C18H15P)(2)] PF6 center dot H2O, the structure of the Ru-III complex cation is very similar to that in the orthorhombic crystal of the nonhydrated complex [ Noda, Ohuchi, Hashimoto, Fujiki, Itoh, Iwatsuki, Noda, Suzuki, Kashiwabara & Takagi ( 2006), Inorg. Chem. 45, 1349 - 1355]. In the present crystal structure, the P-Ru-P bond axes of the complex cations are aligned parallel to the [ 101] direction.

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  • Monodentate, didentate chelating, and bridging 1,8-naphthyridine complexes of pentamethylcyclopentadienyliridium(III): Syntheses and structures in the solid states and in solution

    T Suzuki

    INORGANICA CHIMICA ACTA   359 ( 8 )   2431 - 2438   2006.5

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    A series of new iridium(III) complexes containing pentamethylcyclopentadienyl (Cp* = eta(5)-C5Me5) and 1,8-naphthyridine (napy) have been prepared. X-ray crystallography revealed that napy acted as a monodentate, a didentate chelating, and a bridging ligand in complexes of [Cp*IrCl2(napy)] (1), [Cp*IrCl(napy)]PF6 (2), and [(Cp*IrC])(2)(H)(napy)]PF6 (4), respectively. The crystal structure of [Cp*Ir(napy)(2)]-(PF6)(2) (3) has also been determined; the dicationic complex bore both monodentate and chelating napy ligands. Dinuclear Cp*Ir-III complex bridged by napy was only isolable if two Ir-III centers were supported by a hydride (H-) bridge. In complexes 2 and 3, the four-membered chelate rings formed by napy exhibited a large steric strain; in the rings the N-Ir-N bond angles were only 60.5(2)-61.0(4)degrees and the Ir-N-C angles were 94.7(8)-96.7(8)degrees. The bridging coordination of napy in complex 4 also afforded a large strain, i.e., the Ir-III centers were displaced by 0.84(3) angstrom from the napy plane, due to the steric interaction between two Cp*IrCl moieties. The monodentate napy complex I in CDCl3 or CD2Cl2 at ambient temperature showed a rapid coordination-site exchange reaction, which gave two N sites of napy equivalent; at temperatures below -40 degrees C, the H-1 NMR spectra corresponded to the molecular structure of [Cp*IrCl2(napy-KN)]. The analogous diazido complex of [Cp*Ir(N-3)(2)(napy)] (5) has also been prepared, and the crystal structure has been determined. In contrast to the dichloro complex 1, the diazido complex 5 exhibited a dissociation equilibrium of coordinated napy in solution. (c) 2006 Elsevier B.V. All rights reserved.

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  • Syntheses, structural determinations of [Ru(ROCS2)(2)(PPh3)(2)](+/0) pairs, and kinetic analyses of thermal reactions involving transient trans-[Ru(PrOCS2)(2)(PPh3)(2)] species (ROCS2- = ethyl- or isopropylldithiocarbonate and PPh3 = triphenylphosphine)

    K Noda, Y Ohuchi, A Hashimoto, M Fujiki, S Itoh, S Iwatsuki, T Noda, T Suzuki, K Kashiwabara, HD Takagi

    INORGANIC CHEMISTRY   45 ( 3 )   1349 - 1355   2006.2

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    Controlled-potential electrochemical oxidation of cis-[Ru(ROCS2)(2)(PPh3)(2)] (R = Et, Pr-i) yielded corresponding Ru(III) complexes, and the crystal structures of cis-[Ru(ROCS2)(2)(PPh3)(2)] and trans-[Ru(ROCS2)(2)(PPh3)(2)](PF6) were determined. Both pairs of complexes exhibited almost identical coordination structures. The Ru-P distances in trans-[Ru-III(ROCS2)(2)(PPh3)(2)](PF6) [2.436(3)-2.443(3) angstrom] were significantly longer than those in cis-[Ru-II(ROCS2)(2)(PPh3)(2)] [2.306(1)-2.315(2) angstrom]: the smaller ionic radius of Ru(III) than that of Ru(II) stabilizes the trans conformation for the Ru(III) complex due to the steric requirement of bulky phosphine ligands while mutual trans influence by the phosphine ligands induces significant elongation of the Ru-III-P bonds. Cyclic voltammograms of the cis-[Ru(ROCS2)(2)(PPh3)(2)] and trans-[Ru(ROCS2)(2)(PPh3)(2)](+) Complexes in dichloromethane solution exhibited typical dual redox signals corresponding to the cis-[Ru(ROCS2)(2)(PPh3)(2)](+/0) (ca. +0.15 and +0.10 V vs ferrocenium/ferrocene couple for R = Et and Pr-i, respectively) and to trans-[Ru(ROCS2)(2)(PPh3)(2)](+/0) (-0.05 and -0.15 V vs ferrocenium/ferrocene for R = Et and Pr-i, respectively) couples. Analyses on the basis of the Nicholson and Shain's method revealed that the thermal disappearance rate of transient trans-[Ru(ROCS2)(2)(PPh3)(2)] was dependent on the concentration of PPh3 in the bulk: the rate constant for the intramolecular isomerization reaction of trans-[Ru((PrOCS2)-Pr-i)(2)(PPh3)(2)] was determined as 0.338 +/- 0.004 s(-1) at 298.3 K (Delta H* = 41.8 +/- 1.5 kJ mol(-1) and Delta S* = -114 +/- J mol(-1) K-1), while the dissociation rate constant of coordinated PPh3 from the trans-[Ru((PrOCS2)-Pr-i)(2)(PPh3)(2)] species was estimated as 0.113 +/- 0.008 s(-1) at 298.3 K (Delta H* = 97.6 +/- 0.8 kJ mol(-1) and Delta S* = 64 +/- 3 J mol(-1) K-1), by monitoring the EC reaction (electrode reaction followed by chemical processes) at different concentrations of PPh3 in the bulk. It was found that the trans to cis isomerization reaction takes place via the partial dissociation of (PrOCS2-)-Pr-i from Ru(II), contrary to the previous claim that it takes place by the twist mechanism.

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  • Synthesis, structure and magnetic properties of pyrazolate-bridged dinuclear complexes [{M(NCS)(4-Phpy)}(2)(mu-bpypz)(2)](M=Co2+ and Fe2+)

    K Yoneda, K Nakano, J Fujioka, K Yamada, T Suzuki, A Fuyuhiro, S Kawata, S Kaizaki

    POLYHEDRON   24 ( 16-17 )   2437 - 2442   2005.11

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    The synthesis and magnetic characterization of pyrazolato-bridged dinuclear complexes [{M(NCS)(4-Phpy)}(2)(mu-bpypz)(2)] (Hbpypz=3,5-bis(2-pyridyl)-pyrazole; 4-Phpy=4-phenylpyridine; M=CO2+ (1) and Fe2+ (2)) are described together with the X-ray crystal analysis of the cobalt complex. The structure of 1 shows that the desired coordination has been achieved with the cobalt atoms being coordinated to two bpypz to form the dimer. The X-ray diffraction patterns show 1 and 2 to be isomorphous at room temperature. 2 displays it single spin-crossover transition between the [HS-HS] and [LS-LS] states with T-c = 150 K. (c) 2005 Elsevier Ltd. All rights reserved.

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  • Structure and reactivity of a pyridine-1-imido-2-thiolato complex of iridium(III), Cp*Ir(1-N-2-Spy), generated by photolysis of the (azido)(pyridine-2-thiolato) complex, Cp*Ir(2-Spy)(N-3)

    Y Sekioka, S Kaizaki, JM Mayer, T Suzuki

    INORGANIC CHEMISTRY   44 ( 23 )   8173 - 8175   2005.11

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    Photolysis of the (azido)(pyrdine-2-thiolato)iridium(III) complex Cp*lr(2-Spy)(N-3) (1) gave a pyridine-1-imido-2-thiolato complex, Cp*lr(1-N-2-Spy) (2), in which one of the nitrogen atoms of the azide ligand has been inserted into the lr-N(py) bond (Cp* = eta(5)-C5Me5). Complex 2 reacted quantitatively with methyl iodide to give the N-methylated product, [Cp*lr(1-NMe-2-Spy)]l (3). X-ray crystallography revealed that both 2 and 3 have similar two-legged piano stool structures with planar 1-N-2-Spy(2-) or 1-NMe-2(-)Spyligands, which form iridacyclopentadienyl-like rings by moderate S(p pi)/N(p pi) to lr(d pi) pi donation.

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  • Preparation, crystal structures and spectroscopic properties of novel [(MCl3-n)-Cl-III (P)3(+n)]n(+) (M = Co, Rh; n=0, 1, 2 or 3) series of complexes containing tripodal tridentate phosphine, 1,1,1-tris(dimethylphosphinomethyl)ethane

    T Suzuki, T Tsukuda, M Kiki, S Kaizaki, K Isobe, HD Takagi, K Kashiwabara

    INORGANICA CHIMICA ACTA   358 ( 8 )   2501 - 2512   2005.5

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    Cobalt(III) and rhodium(III) complexes of the series of [(MCl3)-Cl-III - (P)(3) + n](n+) (M = Co or Rh; n = 0, 1, 2 or 3) have been prepared with the use of 1,1,1-tris(dimethylphosphinomethyl)ethane (tdmme) and mono- or didentate phosphines. The single-crystal X-ray analyses of both series of complexes revealed that the M-P and M-Cl bond lengths were dependent primarily on the strong trans influence of the phosphines, and secondarily on the steric congestion around the metal center resulting from the coordination of several phosphine groups. In fact, the M-P(tdmme) bonds became longer in the order Of [MCl3(tdmme)] &lt; [MCl2(tdmme)(PMe3)](+) &lt; [MCI(tdmme)(dmpe)](2+) (dmpe = 1,2-bis(dimethylphosphino)ethane) &lt; [M(tdmme)(2)](3+) for both Co-III and Rh-III series of complexes, while the M-CI bond lengths were shortened in this order (except for [M(tdmme)(2)](3+)). Such a steric congestion around the metal center can also account for the structural and spectroscopic characteristics of the series of complexes, [MCI(tdmme)(dmpm, dmpe or dmpp)](2+) (dmpm = bis(dimethylphosphino)methane, dmpp = 1,3-bis(dimethylphosphino)propane). The X-ray analysis for [CoCl(tdmme)(dmpm or dmpe)](BF4)(2) showed that all Co-P bonds in the dmpm complex were shorter by 0.03-0.04 angstrom than those in the dmpe complex. Furthermore, the first d-d transition energy of the Co-III complexes and the (1)J(Rh-P(tdmme)) coupling constants observed for the Rh-III complexes indicated an unusual order in the coordination bond strengths of the didentate diphosphines, i.e., dmpm &gt; dmpe &gt; dmpp. (c) 2005 Elsevier B.V. All rights reserved.

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  • Synthesis, structure and magnetic properties of lanthanide(III) complexes with new imidazole-substituted imino nitroxide radical

    T Tsukuda, T Suzuki, S Kaizaki

    INORGANICA CHIMICA ACTA   358 ( 4 )   1253 - 1257   2005.3

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    Synthesis, characterization and magnetic properties of new lanthanide-radical complexes, [Ln(III)(hfac)(3)(IM2imH)] (Ln = Gd, Tb; IM2imH=2-(2-pyridyl)-4,5-dihydro-4,4,5,5-tetramethyl-1H-imidazolyl-1-oxy), are described. The molecular structure of the [Tb(hfaC)(3)(IM2imH)] has been determined by the X-ray diffraction. The magnetic susceptibility data for [Gd(hfaC)(3)(IM2imH)] show that the Gd-IM2imH magnetic interaction is antiferromagnetic with an exchange coupling constant J = -2.59 cm(-1) in contrast to the ferromagnetic interaction in most of Gd(III) complexes containing paramagnetic center, which will be examined in connection with planarity of the IM2imH chelate. (c) 2004 Elsevier B.V. All rights reserved.

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  • Azido(2,2 '-bipyridine)(eta(5)-pentamethylcyclopentadienyl)iridium(III) hexafluorophosphate

    T Suzuki

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE   61   M488 - M490   2005.3

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    In the title compound, [Ir(C10H15)(N-3)(C10H8N2)]PF6, the linear azide ligand adopts an end-on terminal coordination mode with a relatively long Ir-N bond of 2.230 (6) Angstrom. The azide is asymmetric in an unusual way: the azide N-N bond adjacent to the azide Ir-N bond [1.025 (12) Angstrom] is significantly shorter than the terminal azide N-N bond [1.282 (15) Angstrom], while the azide Ir-N-N bond angle is 116.4 (6)degrees.

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  • Syntheses, structural analyses and redox kinetics of four-coordinate [CuL2](2+) and five-coordinate [CuL2(solvent)](2+) complexes (L=6,6 '-dimethyl-2,2 '-bipyridine or 2,9-dimethyl-1,10-phenanthroline): completely gated reduction reaction of [Cu(dmp)(2)](2+) in nitromethane

    S Itoh, N Kishikawa, T Suzuki, HD Takagi

    DALTON TRANSACTIONS   ( 6 )   1066 - 1078   2005

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    [Cu(2,9-dimethyl-1,10-phenanthroline)2](2+) and [Cu(6,6'-dimethyl-2,2'-bipyridine)(2)](2+/+) complexes with no coordinated solvent molecule were synthesized and the crystal structures were analyzed: the coordination geometry around the Cu(I) center was in the D-2d symmetry while a D-2 structure was observed for the four-coordinate Cu(II) complexes. Coordination of a water or an acetonitrile molecule was found in the trigonal plane of the five-coordinate Cu(II) complex in the Tbp (trigonal bipyramidal) structure. Spectrophotometric analyses revealed that the D-2 structure of the Cu(II) complex was retained in nitromethane, although a five-coordinate Tbp species (green in color), was readily formed upon dissolution of the solid (reddish brown) in acetonitrile. The electron self-exchange reaction between D-2d-Cu(I) and D-2-Cu(II), observed by the NMR method, was very rapid with k(ex) = (1.1 +/- 0.2) x 10(5) kg mol(-1) s(-1) at 25degreesC(DeltaH* = 15.6 +/- 1.3 kJ mol(-1) and DeltaS* = 96 +/- 4 J mol(-1) K-1), which was more than 10 times larger than that reported for the self-exchange reaction between D-2d-Cu(I) and Tbp-Cu(II) in acetonitrile. The cross reduction reactions of D-2-Cu(II) by ferrocene and decamethylferrocene in nitromethane exhibited a completely gated behavior, while the oxidation reaction of D-2d-Cu(I) by [Ni(1,4,7-triazacyclononane)(2)](3+) in nitromethane estimated an identically large self-exchange rate constant to that directly obtained by the NMR method. The electron self-exchange rate constant estimated from the oxidation cross reaction in 50% v/v acetonitrile nitromethane mixture was 10 times smaller than that observed in pure nitromethane. On the basis of the Principle of the Least Motion (PLM) and the Symmetry Rules, it was concluded that gated behaviors observed for the reduction reactions of the five-coordinate Cu(II) polypyridine complexes are related to the high-energy C-2v --&gt; D-2d conformational change around Cu(II), and that the electron self-exchange reactions of the Cu(II)/(I) couples are always adiabatic through the C-2v structures for both Cu(II) and Cu(I) since the conformational changes between D-2d, D-2 and C-2v structures for Cu(I) as well as the conformational change between Tbp and C-2v structures for Cu(II) are symmetry-allowed. The completely gated behavior observed for the reduction reactions of D-2-Cu(II) species in nitromethane was attributed to the very slow conformational change from the ground-state D-2 to the entatic D-2d structure that is symmetry-forbidden for d(9) metal complexes: the very slow back reaction, the forbidden conformational change from entatic to the ground-state D-2 structure, ensures that the rate of the reduction reaction is independent of the concentration of the reducing reagent.

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  • Anomalous diamagnetic behaviour of the H-1 NMR spectra of a coordinated imino nitroxide radical in diamagnetic and paramagnetic lanthanide(III) complexes

    Tsukuda, T., Ogita, M., Suzuki, T., Kaizaki, S.

    European Journal of Inorganic Chemistry   ( 22 )   2004

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    DOI: 10.1002/ejic.200400259

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  • Crystal structure and spectroscopic properties of oxalato (1,4,8,11-tetraazacyclotetradecane)chromium(III) perchlorate

    Choi, J. H., Oh, I. G., Suzuki, T., Kaizaki, S.

    Journal of Molecular Structure   694 ( 1-3 )   2004

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    DOI: 10.1016/j.molstruc.2004.01.034

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  • Syntheses and first structural analyses of Cu(I)-PS complexes with bidentate 1,1-diphenyl-1-phospha-4-thiapentane (mtdpp) and quadridentate 5,9-diphenyl-5,9-diphospha-2,12-dithiatridecane (2,3,2-SPPS): successful synthetic route for monomeric Cu(mtdpp)2 BF4 and dimeric Cu-2(2,3,2-SPPS)(2) (BF4)(2)

    Noda, K., Sasaki, T., Iwatsuki, S., Kashiwabara, K., Suzuki, T., Takagi, H. D.

    Inorganica Chimica Acta   357 ( 2 )   2004

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    DOI: 10.1016/j.ica.2003.08.008

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  • Synthesis and characterization of Co(NO2)(2)(acac)(IMH2py) with one-electron-reduced imino nitroxide radical associated with unusual displacement of acetylacetonate in the starting complex trans-Na Co(NO2)(2)(acac)(2)

    Ishida, T., Suzuki, T., Kaizaki, S.

    Inorganica Chimica Acta   357 ( 11 )   2004

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    DOI: 10.1016/j.ica.2004.03.031

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  • Synthesis, magnetic properties and MCD spectra of a four coordinate copper(II) complex with two chelated phenolate-substituted imino nitroxides

    Kanda, H., Narumi, Y., Hosokoshi, Y., Suzuki, T., Kawata, S., Kindo, K., Inoue, K., Kaizaki, S.

    Inorganica Chimica Acta   357 ( 11 )   2004

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    DOI: 10.1016/j.ica.2004.03.017

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  • Cobalt(III) complexes of monodentate N(9)-bound adeninate (ade(-)), Co(ade-kappa N-9)Cl(en)(2) (+) (en = 1,2-diaminoethane): Syntheses, crystal structures, and protonation behaviors of the geometrical isomers

    Suzuki, T., Hirai, Y., Monjushiro, H., Kaizaki, S.

    Inorganic Chemistry   43 ( 20 )   2004

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    DOI: 10.1021/ic035336z

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  • Crystal and molecular structures of bis 8-(diphenylphosphino)-quinoline palladium(II) complexes: Pd(Ph(2)Pqn)(2)XY (XY = Cl-2, Br-2 or ClBF4)

    Suzuki, T.

    Bulletin of the Chemical Society of Japan   77 ( 10 )   2004

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    DOI: 10.1246/bcsj.77.1869

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  • A novel linkage isomeric pair of mixed ligand Ni(II) complexes with IM2py-kappa N-2,O and IM2py-kappa N-2,N modes in Ni(acac)(tmen)-(IM2py) (+); synthesis and X-ray structure

    Tsukahara, Y., Kamatani, T., Suzuki, T., Kaizaki, S.

    Dalton Transactions   ( 7 )   2003

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    DOI: 10.1039/b301530k

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  • Dipotassium di-mu-hydroxo-bis (nitrilotriacetato-kappa N-4,O,O ',O '')chromium(III) hexahydrate

    Choi, J. H., Suzuki, T., Kaizaki, S.

    Acta Crystallographica Section E-Structure Reports Online   59 ( 9 )   2003

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    DOI: 10.1107/s160053680301883x

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  • Heterobimetallic (acac)(2)Co(ox)Ln(HBpz(3))(2) complexes: synthesis, characterization and spectroscopic properties

    Subhan, M. A., Sanada, T., Suzuki, T., Kaizaki, S.

    Inorganica Chimica Acta   353   2003

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    DOI: 10.1016/s0020-1693(03)00328-1

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  • Nitrogen atom insertion into Ir-S and C-S bonds initiated by photolysis of iridium(III)-azido-dithiocarbamato complexes

    Suzuki, T., DiPasquale, A. G., Mayer, J. M.

    Journal of the American Chemical Society   125 ( 35 )   2003

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    DOI: 10.1021/ja0305779

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  • Ruthenium(II) complexes containing 8-(dimethylphosphino)quinoline (Me(2)Pqn): Preparation, crystal structures, and electrochemical and spectroscopic properties of Ru(bpy or phen)(3-n)(Me(2)Pqn)(n) (PF6)(2) (bpy=2,2 '-bipyridine; phen=1,10-phenanthroline; n=1, 2, or 3)

    Suzuki, T., Kuchiyama, T., Kishi, S., Kaizaki, S., Takagi, H. D., Kato, M.

    Inorganic Chemistry   42 ( 3 )   2003

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  • Synthesis, X-ray structures and NIR chiroptical properties of a series of dinuclear lanthanide(III) complexes Ln(2){mu-(S- or RS-pba)}(4)(HBpz(3))(2) ; novel configurational chirality due to non-bonding Ln center dot center dot center dot O interactions

    Subhan, M. A., Suzuki, T., Fuyuhiro, A., Kaizaki, S.

    Dalton Transactions   3 ( 19 )   2003

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  • Simultaneous observation of low temperature 4f-4f and 3d-3d emission spectra in a series of Cr(III)(ox)Ln(III) assembly

    Subhan, M. A., Nakata, H., Suzuki, T., Choi, J. H., Kaizaki, S.

    Journal of Luminescence   101 ( 4 )   2003

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    DOI: 10.1016/s0022-2313(02)00573-2

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  • Syntheses, crystal structures and isomerization kinetics of a series of Co(dtc)(2){P(OMe)(3)-Ph-n(n)}(2) (+) (n=0-2) complexes (dtc(-) = N,N-dimethyldithiocarbamate): role of sigma-donicity, pi-acidity, and cone angle of the P-ligands in the trans influence and trans effect

    Iwatsuki, S., Kashiwamura, S., Kashiwabara, K., Suzuki, T., Takagi, H. D.

    Dalton Transactions   3 ( 11 )   2003

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  • Syntheses, structures, magnetic and spectroscopic properties of bis(pentane-2,4-dionato)chromium(III) complexes incorporating 3-or 4-pyridyi-substituted nitronyl and imino nitroxides

    Iino, A., Suzuki, T., Kaizaki, S.

    Dalton Transactions   3 ( 24 )   2003

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  • Solution NIR CD and MCD in 4f-4f transitions of a series of chiral 3d-4f dinuclear complexes: X-ray structures of (Lambda-Delta)- (acac)(2)Cr-III(mu-ox)Ln(III)(HBpz(3))(2) (Ln = Sm, Ho and Er)

    Subhan, M. A., Suzuki, T., Kaizaki, S.

    Journal of the Chemical Society-Dalton Transactions   ( 7 )   2002

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    DOI: 10.1039/b108770c

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  • Structural and spectroscopic comparisons of the square-planar four-coordinate o-phenylenebis(biuretato) cobaltate(III) complex and the five-coordinate mono- and six-coordinate dicyano adducts

    Yagi, T., Hanai, H., Komorita, T., Suzuki, T., Kaizaki, S.

    Journal of the Chemical Society-Dalton Transactions   ( 6 )   2002

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    DOI: 10.1039/b106001p

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  • Synthesis and properties of lanthanide(III) complexes containing pyridine-substituted imino nitroxide radical

    Tsukuda, T., Suzuki, T., Kaizaki, S.

    Molecular Crystals and Liquid Crystals   379   2002

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    DOI: 10.1080/10587250290090417

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  • Synthesis, magnetic properties, and electronic spectra of bis(beta-diketonato)chromium(III) and nickel(II) complexes with a chelated imino nitroxide radical: X-ray structures of Cr(acaMe)(2)(IM2py) PF6 and Ni(acac)(2)(IM2py)

    Tsukahara, Y., Kamatani, T., Iino, A., Suzuki, T., Kaizaki, S.

    Inorganic Chemistry   41 ( 17 )   2002

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    DOI: 10.1021/ic011282m

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  • Ethylenediammonium bis{bis N-(2-aminoethyl)glycinato-kappa N-3,N ',O chromium(III)} tetrachloride dihydrate at 293 and 100 K

    Choi, J. H., Suzuki, T., Subhan, M. A., Kaizaki, S., Park, Y. C.

    Acta Crystallographica Section C-Crystal Structure Communications   58 ( 7 )   2002

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    DOI: 10.1107/s0108270102009885

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  • Laser emission in 4f-4f transitions of some Nd(III) complexes

    Subhan, M. A., Suzuki, T., Kaizaki, S.

    Molecular Crystals and Liquid Crystals   379   2002

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    DOI: 10.1080/10587250290090787

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  • Preparation, crystal structures and isomerization kinetics of cis- and trans- Co(dtc)(2)(PHPh2)(2) (+): thermodynamically and kinetically stable cobalt(III)-P bonds through interplay of sigma-donicity, pi- acidity, and steric bulkiness

    Iwatsuki, S., Suzuki, T., Hasegawa, A., Funahashi, S., Kashiwabara, K., Takagi, H. D.

    Journal of the Chemical Society-Dalton Transactions   ( 18 )   2002

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    DOI: 10.1039/b203792k

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  • Bis trans-dibromo(2,2-dimethyl-propane-1,3-diamine-kappa N-2,N ')chromium(III) dibromide hydrogen perchlorate hexahydrate

    Choi, J. H., Suzuki, T., Kaizaki, S.

    Acta Crystallographica Section C-Crystal Structure Communications   58 ( 11 )   2002

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    DOI: 10.1107/s0108270102018231

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  • Bis(mu-N,N-dimethyldithiocarbamato-kappa S-3,S ': S ')bis (dimethoxyphenylphosphane-kappa P)(N,N-dimethyldithiocarbamato-kappa S-2,S ')cobalt(III) bis(hexafluorophosphate)

    Suzuki, T., Takagi, H. D., Kashiwabara, K.

    Acta Crystallographica Section C-Crystal Structure Communications   58 ( 2 )   2002

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    DOI: 10.1107/s0108270101018406

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  • Synthesis, spectroscopic and magnetic properties of lanthanide(III) complexes with a chelated imino nitroxide radical

    Tsukuda, T., Suzuki, T., Kaizaki, S.

    Journal of the Chemical Society-Dalton Transactions   ( 8 )   2002

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    DOI: 10.1039/b106401k

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  • Triple hydrogen bond directed crystal engineering of metal assembled complexes: The effect of a novel organic-inorganic module on supramolecular structure

    Sugiyama, Y., Adachi, K., Kabir, M. K., Kitagawa, S., Suzuki, T., Kaizaki, S., Kawata, S.

    Molecular Crystals and Liquid Crystals   379   2002

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    DOI: 10.1080/10587250290090822

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  • Preparation, crystal structures and spectroscopic properties of chloro(pentane-2,4-dionato) {1,1,1-tris(dimethylphosphinomethyl)ethane}chromium(III), -cobalt(III) and -rhodium(III) hexafluorophosphate: comparison of the M-P, M-Cl and M-O (M = Cr, Co and Rh) bond lengths among the three M-III complexes

    Suzuki, T., Imamura, T., Kaizaki, S., Kashiwabara, K.

    Polyhedron   21 ( 8 )   2002

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    DOI: 10.1016/s0277-5387(02)00859-8

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  • Preparation, crystal structures, electrochemical and spectroscopic properties of bis(2(')2 '-bipyridine)ruthenium(II) complexes containing 8-(diphenylphosphino)quinoline or 2-(diphenylphosphino)pyridine

    Suzuki, T., Kuchiyama, T., Kishi, S., Kaizaki, S., Kato, M.

    Bulletin of the Chemical Society of Japan   75 ( 11 )   2002

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    DOI: 10.1246/bcsj.75.2433

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  • Syntheses, structures, and spectroscopic properties of cobalt(III) complexes containing 3- or 4-pyridyl-substituted nitronyl and imino nitroxide ligands

    Ogita, M., Yamamoto, Y., Suzuki, T., Kaizaki, S.

    European Journal of Inorganic Chemistry   ( 4 )   2002

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    DOI: 10.1002/1099-0682(200203)2002:4<886::AID-EJIC886>3.0.CO;2-Z

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  • Synthesis, magnetic properties, and electronic spectra of mixed ligand bis(beta-diketonato)chromium(III) complexes with a chelated nitronyl nitroxide radical: X-ray structure of Cr(dpm)(2)(NIT2py) PF6

    Tsukahara, Y., Iino, A., Yoshida, T., Suzuki, T., Kaizaki, S.

    Journal of the Chemical Society-Dalton Transactions   ( 2 )   2002

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    DOI: 10.1039/b104092h

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  • Syntheses, Structures, Magnetic, and Spectroscopic Properties of Cobalt(II), Nickel(II) and Zinc(II) Complexes Containing 2-(6-Methyl)Pyridyl-Substituted Nitronyl and Imino Nitroxide Reviewed

    Youhei, Yamamoto, Takayoshi, Suzuki, Sumio, Kaizaki

    J. Chem. Soc. Dalton Trans.   ( 19 )   2943-2950   2001.1

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    DOI: 10.1039/b103647p

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  • Syntheses, structures and spectroscopic properties of mixed-ligand chromium(III) complexes containing 1,2-bis(dimethylphosphino)-ethane, 1,3-bis (dimethylphosphino)propane or 1,1,1-tris (dimethylphosphinomethyl)ethane

    Suzuki, T., Kashiwabara, K., Usami, T., Imamura, T., Kiki, M., Fujita, J., Kaizaki, S.

    Bulletin of the Chemical Society of Japan   74 ( 6 )   2001

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    DOI: 10.1246/bcsj.74.1055

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  • Stereospecific assembly of chiral Lambda-Cr(III)-Delta-Ln(III)-oxalato-bridged dinuclear 3d-4f complexes (Ln = Yb or Dy) and near infrared circular dichroism in the 4f -> 4f transitions

    Subhan, M. A., Suzuki, T., Kaizaki, S.

    Journal of the Chemical Society-Dalton Transactions   ( 4 )   2001

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    DOI: 10.1039/b007369p

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  • Crystal structures, magnetic and spectroscopic properties of manganese(II), cobalt(II), nickel(II) and zinc(II) dichloro complexes bearing two 2-pyridyl-substituted imino nitroxides

    Yamamoto, Y., Suzuki, T., Kaizaki, S.

    Journal of the Chemical Society-Dalton Transactions   ( 10 )   2001

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    DOI: 10.1039/b010243l

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  • New low-spin Co(II) complexes with novel tripodal 1,1,1-tris(dimethylphosphinomethyl)ethane ligand: electron transfer kinetics and spectroscopic characterization of Co(II)P-6 and Co(II)P3S3 ions in aqueous solution

    Iwatsuki, S., Obeyama, K., Koshino, N., Funahashi, S., Kashiwabara, K., Suzuki, T., Takagi, H. D.

    Canadian Journal of Chemistry-Revue Canadienne De Chimie   79 ( 9 )   2001

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    DOI: 10.1139/cjc-79-9-1344

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  • A geometrical isomeric pair of novel cobalt(III) complexes containing diphenylphosphine: Cis- and trans-[Co(dtc)<inf>2</inf>(PHPh<inf>2</inf>)<inf>2</inf>]BF<inf>4</inf>(dtc = N,N-dimethyldithiocarbamate)

    Suzuki, T., Iwatsuki, S., Takagi, H.D., Kashiwabara, K.

    Chemistry Letters   ( 10 )   2001

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    DOI: 10.1246/cl.2001.1068

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  • Preparation, Crystal Structures and spectroscopic properties of a series of cobalt(III) phosphine complexes: trans- and cis- Co(dtc)(2)(PMe3-nPhn)(2) (+) (dtc = N,N-dimethyldithiocarbamate; n=0, 1, 2 or 3)

    Suzuki, T., Kashiwamura, S., Kashiwabara, K.

    Bulletin of the Chemical Society of Japan   74 ( 12 )   2001

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    DOI: 10.1246/bcsj.74.2349

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  • A nitronyl nitroxide complex of nickel(II) with nitrate as a ligand

    Yoshida, T., Suzuki, T., Kaizaki, S.

    Acta Crystallographica Section C-Crystal Structure Communications   57 ( 11 )   2001

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    DOI: 10.1107/s0108270101013725

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  • Crystal structures of cobalt(II), nickel(II) and zinc(II) dichloro complexes bearing 2-pyridyl-substituted nitronyl nitroxide (NIT2py)

    Yamamoto, Y., Yoshida, T., Suzuki, T., Kaizaki, S.

    Inorganica Chimica Acta   325 ( 1-2 )   2001

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    DOI: 10.1016/s0020-1693(01)00636-3

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  • trans-(methanol)(methyldiphenyl-phosphine)bis(pentane-2,4-dionato)cobalt (III) hexafluorophosphate hydrate

    Suzuki, T.

    Acta Crystallographica Section C-Crystal Structure Communications   56 ( 4 )   2000

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    DOI: 10.1107/s0108270100002894

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  • Oxidative additions of cyclo-octasulfur and cyclo-octaselenium to the cobalt(II) complex of 1,3-bis(dimethylphosphino)propane (dmpp): Crystal structures and spectroscopic properties of [Co(s<inf>2</inf>O)(dmpp)<inf>2</inf>]PF<inf>6</inf>and [Co(Se<inf>2</inf>)(dmpp)<inf>2</inf>]BF<inf>4</inf>

    Suzuki, T., Tsuji, N., Kashiwabara, K., Tatsumi, K.

    Inorganic Chemistry   39 ( 17 )   2000

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    DOI: 10.1021/ic000289l

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  • Structural and spectroscopic comparisons in two series of cobalt(III)-monodentate phosphine complexes: trans- Co(acac)(2)(PMe3-nPhn)(H2O) PF6 and trans- Co(acac)(2)(PMe3-nPhn)(2) PF6 (acac = pentane-2,4-dionate; n=0, 1, 2 and 3)

    Suzuki, T., Kaizaki, S., Kashiwabara, K.

    Inorganica Chimica Acta   298 ( 2 )   2000

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    DOI: 10.1016/s0020-1693(99)00399-0

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  • trans-(4-Amino-2,2,6,6-tetramethyl-piperidine-N-4)bis(pentane-2,4-dionat o-O,O ')(triphenylphosphine-P)cobalt(III) hexafluorophosphate dichloromethane solvate

    Suzuki, T., Ogita, M., Kaizaki, S.

    Acta Crystallographica Section C-Crystal Structure Communications   56   2000

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    DOI: 10.1107/s010827010000113x

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  • Cobalt(II) phosphine complexes stable in aqueous solution: spectroscopic and kinetic evidence for low-spin Co(II)P-6 and Co(II)P3S3 with tripodal 1,1,1-tris(dimethylphosphinomethyl) ethane

    Iwatsuki, S., Kato, H., Obeyama, K., Funahashi, S., Koshino, N., Kashiwabara, K., Suzuki, T., Takagi, H. D.

    Inorganic Chemistry Communications   3 ( 10 )   2000

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    DOI: 10.1016/s1387-7003(00)00134-9

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  • Synthesis, magnetic properties, and electronic spectra of octahedral mixed-ligand (beta-diketonato)nickel(II) complexes with a chelated nitronyl nitroxide radical

    Yoshida, T., Suzuki, T., Kanamori, K., Kaizaki, S.

    Inorganic Chemistry   38 ( 6 )   1999

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    DOI: 10.1021/ic981283n

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  • Tricarbonyl 1,1,1-tris(dimethylphosphinomethyl)ethane chromium(0), -molybdenum(0) and -tungsten(0) complexes

    Suzuki, T., Imamura, T., Kaizaki, S.

    Acta Crystallographica Section C-Crystal Structure Communications   55 ( 2 )   1999

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    DOI: 10.1107/s0108270198012414

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  • Heterotrinuclear complexes containing d- and f-block elements: synthesis and structural characterisation of novel lanthanide(III)-nickel(II)-lanthanide(III) compounds bridged by oxamidate

    Sanada, T., Suzuki, T., Kaizaki, S.

    Journal of the Chemical Society-Dalton Transactions   ( 6 )   1998

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    DOI: 10.1039/a706834d

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  • Isolation and characterization of (RhCP*)(2){eta(1):eta(4):eta(2)-mu-CHC(Ph)CHC(Ph)CHCH2} (+) (CP* = eta(5)-C5Me5). Reinvestigation of the carbon-carbon bond formation between mu-CH2 group and alkynes in (RhCp*)(2)(mu-CH2)(2)(CH3CN)(2) (2+)

    Kaneko, Y., Suzuki, T., Isobe, K., Maitlis, P. M.

    Journal of Organometallic Chemistry   554 ( 2 )   1998

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    DOI: 10.1016/s0022-328x(97)00756-0

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  • Reactions of terminal and bridging thiol di-mu-methylene dirhodium complexes with alkynes to afford the corresponding ethenethiolate complexes. Remarkable C-C bond formation between two mu-CH2 and alkynes on the bridging ethenethiolate complexes

    Kaneko, Y., Suzuki, N., Nishiyama, A., Suzuki, T., Isobe, K.

    Organometallics   17 ( 22 )   1998

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    DOI: 10.1021/om980299i

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  • Syntheses and crystal structures of geometrical isomeric pairs: trans- and cis-(PPh4) Co(acac)(2)(CN)(2) and trans- and cis- Co(acac)(2)(PMe3 or PEt3)(2) PF6 (acac = pentane-2,4-dionate)

    Suzuki, T., Kashiwabara, K., Kita, M., Fujita, J., Kaizaki, S.

    Inorganica Chimica Acta   281 ( 1 )   1998

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    DOI: 10.1016/s0020-1693(98)00146-7

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  • Synthesis and structural characterization of cobalt(III) complexes of hybrid donor-type didentate or tetradentate ligands bearing dimethylphosphino and thioether groups

    Kashiwabara, K., Taguchi, N., Takagi, H. D., Nakajima, K., Suzuki, T.

    Polyhedron   17 ( 11-12 )   1998

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    DOI: 10.1016/s0277-5387(97)00526-3

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  • Cis-butadiene framework formation from a unique coupling of two mu-CH2 ligands with activated alkyne on (RhCp*)(2)(mu-CH2)(2){mu-SC(COOMe)=CH(COOMe)} (+) (Cp* = eta(5)-C5Me5) derived from the corresponding mu-SH complex: Effect of the substituted ethenethiolate ligand on the coupling

    Kaneko, Y., Suzuki, T., Isobe, K.

    Organometallics   17 ( 6 )   1998

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    DOI: 10.1021/om971038w

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  • Heterodinuclear complexes containing d- and f-block elements: Synthesis, structural characterization, and metal-metal interactions of novel chromium(III)-lanthanide(III) compounds bridged by oxalate

    Sanada, T., Suzuki, T., Yoshida, T., Kaizaki, S.

    Inorganic Chemistry   37 ( 18 )   1998

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    DOI: 10.1021/ic971568k

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  • Oxidative additions of dichloromethane and cyclo-octasulfur to rhodium(I) complexes containing (2-aminoethyl)-dimethylphosphine or -diphenylphosphine

    Kashiwabara, K., Morikawa, A., Suzuki, T., Isobe, K., Tatsumi, K.

    Journal of the Chemical Society-Dalton Transactions   ( 6 )   1997

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    DOI: 10.1039/a606730a

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  • Synthesis and characterization of pentamethylcyclopentadienylrhodium(III) and -iridium(III) complexes with 1,2-benzenedithiolate: (Cp*Rh)(2)(mu(S)-1,2-C6H4S2-S,S ')(2) , (Cp*Rh)(2)(mu(S)-1,2-C6H4S2-S,S ')(mu(S)-1,2-C6H4S(SO2)-S,S ') and (Cp*Ir)(1,2-C6H4S2-S,S ') (Cp*=eta(5)-C-5(CH3)(5)) - Professor Peter M. Maitlis on the occasion of his 65th birthday and in recognition of his pioneer contributions to this field

    Xi, R. M., Abe, M., Suzuki, T., Nishioka, T., Isobe, K.

    Journal of Organometallic Chemistry   549 ( 1-2 )   117 - 125   1997

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    A reaction of the triple cubane-type organometallic polyoxomolybdate cluster, [(Cp * Rh)4Mo4O16] · 2H2O (1 · 2H2O), with 1,2-benzenedithiol gives a 1,2-benzenedithiolate-bridged dinuclear complex, [(Cp * Rh)2(μ(S)-1,2-C6H4S2-S,S′)2] (2), and another dinuclear complex, [(Cp * Rh)2(μ(S)-1,2-C6H4S2-S,S′)(μ(S)-1,2-C6H4S(SO2)-S,S′)] (3), both of which are characterized by the single-crystal X-ray diffraction method. The former complex, 2, is also obtained from a reaction of [(Cp * RhCl)2(μ-Cl)2] with 1,2-benzenedithiol in the presence of NaOCH3, and the latter, 3, from oxygenation of 2 with t-BuOOH. The 1H NMR study in CD2Cl2 indicates that complex 2 changes gradually to a coordinatively unsaturated mononuclear complex, [Cp * Rh(1,2-C6H4S2-S,S′)] (4). An analogous mononuclear iridium(III) complex, [Cp * Ir(1,2-C6H4S2-S,S′)] (5), is also prepared and characterized by X-ray structural analysis. © 1997 Elsevier Science S.A.

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  • Ruthenium(II) complex containing a new hybrid bidentate phosphine-thioether ligand: (p-cymene)RuCl-(Me(2)PCH(2)CH(2)SMe) BPh(4) .0.5CH(2)Cl(2)

    Suzuki, T., Taguchi, N., Kazuo, K.

    Acta Crystallographica Section C-Crystal Structure Communications   52 ( 12 )   1996

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    DOI: 10.1107/s010827019601030x

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  • Structures, Bonding, and Reactivity of M-S-M' (M and M' = Rh, W, and Cu) Groups in Higher-Nuclearity Heterometallic Sulfide Clusters

    Ogo, S., Suzuki, T., Ozawa, Y., Isobe, K.

    Inorganic Chemistry   35 ( 21 )   1996

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  • Syntheses and crystal structures of bis(dimethyldithiocarbamato)-(4,6-diphenyl-4,6-diphosphanonane-1,9-diamm onium)cobalt(III) and chloro(4,9-diphenyl-4,9-diphosphadodecane-1,12-diamine)nickel(II) complexes

    Kashiwabara, K., Watanabe, M., Kita, M., Suzuki, T.

    Bulletin of the Chemical Society of Japan   69 ( 7 )   1996

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    DOI: 10.1246/bcsj.69.1947

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  • Preparation and characterization of Ni(II), Pd(II), and Pt(II) complexes containing (2-aminoethyl)dimethylphosphine or the related didentate phosphine ligands

    Takayoshi Suzuki, Akira Morikawa, Kazuo Kashiwabara

    Bull. Chem. Soc. Jpn.   69 ( 9 )   2539 - 2548   1996

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    DOI: 10.1246/bcsj.69.2539

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  • Conversion of rectangular tetrasulfide ligand in tetrarhodium complex, {(RhCp*)(2)(mu-CH2)(2)}(2)(mu(4)-S-4) (2+) (Cp*=eta(5)-C(5)Me(5)), into disulfide ligands in dirhodium complex, (RhCp*)(2)(mu-CH2)(2)(mu-S-2) by chemical reduction

    Nishioka, T., Nakamura, S., Kaneko, Y., Suzuki, T., Kinoshita, I., Kiyooka, S., Isobe, K.

    Chemistry Letters   ( 10 )   1996

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    DOI: 10.1246/cl.1996.911

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  • Preparation and characterization of rhodium(III) complexes containing 1,1,1-tris(dimethylphosphinomethyl)ethane (tdmme). Structures of RhX(3)(tdmme) (X=Cl Br or I), Rh(NH3)(3)(tdmme) (3+) and {Rh(tdmme)}(2)(mu-X)(3) (3+) (X=Cl or OH) in the solid state and in solution

    Suzuki, T., Isobe, K., Kashiwabara, K., Fujita, J., Kaizaki, S.

    Journal of the Chemical Society-Dalton Transactions   ( 19 )   1996

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    DOI: 10.1039/dt9960003779

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  • Preparation and characterization of mononuclear Pd(II) and dinuclear Pd(I) complexes containing a new phosphine-imine-type didentate ligand, 8-(dimethylphosphino)quinone

    Takayoshi Suzuki, Kazuo Kashiwabara, Junnosuke Fujita

    Bull. Chem. Soc. Jpn.   68 ( 6 )   1619 - 1626   1995

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    DOI: 10.1246/bcsj.68.1619

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  • A NOVEL SYNTHESIS OF OPTICALLY-ACTIVE C-2-SYMMETRICAL PYRIDINE-DERIVATIVES - EFFICIENT REACTION OF CHIRAL TRIFLATES WITH 2-PICOLYLLITHIUM REAGENTS

    Kotsuki, H., Nakagawa, Y., Moriya, N., Tateishi, H., Ochi, M., Suzuki, T., Isobe, K.

    Tetrahedron-Asymmetry   6 ( 5 )   1995

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    DOI: 10.1016/0957-4166(95)00142-c

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  • A UNIQUE 3-STEP CYCLIC REACTION SEQUENCE OF HETEROTRIMETALLIC SULFIDE CLUSTERS - STRUCTURES AND PROPERTIES OF (CP-ASTERISK-RHP(OET)(3)(MU-WS4)(CUCL)CU)(2)(MU-CL)(2) (CP-ASTERISK=ETA(5)-C(5)ME(5)) WITH A BRANCHED STRUCTURE AND (CP-ASTERISK-RHP(OET)(3)(MU-WOS3)(CUCL)CU)(2)(MU-CL)(2) WITH A LINKED INCOMPLETE CUBANE-TYPE STRUCTURE

    Ogo, S., Suzuki, T., Isobe, K.

    Inorganic Chemistry   34 ( 6 )   1995

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    DOI: 10.1021/ic00110a003

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  • DRASTIC STRUCTURAL-CHANGE IN SILVER(I) COMPLEXES WITH ALTERATION OF THE OPTICAL-ACTIVITY OF A PYRIDINE DERIVATIVE LIGAND - HELICAL ARRAYS WITH EXTENDED STRUCTURE AND AN OPTICALLY INACTIVE DINUCLEAR COMPLEX

    Suzuki, T., Kotsuki, H., Isobe, K., Moriya, N., Nakagawa, Y., Ochi, M.

    Inorganic Chemistry   34 ( 3 )   1995

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    DOI: 10.1021/ic00107a002

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  • SYNTHESIS, CRYSTAL-STRUCTURES AND SPECTROSCOPIC PROPERTIES OF CIS- RHCL(2)L(2) (+) L=1,3-BIS(DIMETHYLPHOSPHINO)PROPANE AND TRANS- RHCL(2)L(2) (+) L=1,3-BIS(DIMETHYLPHOSPHINO)PROPANE OR 1,2-BIS(DIMETHYLPHOSPHINO)ETHANE (DMPE) - REINVESTIGATION OF THE DMPE COMPLEXES

    Suzuki, T., Isobe, K., Kashiwabara, K.

    Journal of the Chemical Society-Dalton Transactions   ( 22 )   1995

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/dt9950003609

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  • Synthesis of a linear-type pentanuclear (RhIII-WVI-CuI-WVI-RhIII) sulfide cluster predicted by fast atom bombardment mass spectrometry

    Ogo, S., Suzuki, T., Nomura, S., Asakura, K., Isobe, K.

    Journal of Cluster Science   6 ( 3 )   1995

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/BF01165471

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  • SYNTHESIS AND CRYSTAL-STRUCTURE OF (IRCP-ASTERISK)2(MU-OH)3 2(CR2O7)CENTER-DOT-8H2O (CP-ASTERISK=ETA-5-C5ME5) - A NOVEL 2-DIMENSIONAL HYDROGEN-BONDING NETWORK

    Park, J. T., Nishioka, T., Suzuki, T., Isobe, K.

    Bulletin of the Chemical Society of Japan   67 ( 7 )   1994

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    DOI: 10.1246/bcsj.67.1968

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  • PREPARATION AND CHARACTERIZATION OF IRIDIUM(III) COMPLEXES CONTAINING (2-AMINOETHYL)DIMETHYLPHOSPHINE (EDMP) OR (2-AMINOETHYL)DIPHENYLPHOSPHINE (EDPP) - STRUCTURES OF FAC- IR(EDMP)3 CL3-CENTER-DOT-5H2O AND TRANS(CL,CL),CIS(P,P)- IRCL2(EDPP)2 BF4 AND COMPARISONS OF THEIR PROPERTIES WITH THOSE OF THE COBALT(III) AND RHODIUM(III) ANALOGS

    Suzuki, T., Rude, M., Simonsen, K. P., Morooka, M., Tanaka, H., Ohba, S., Galsbol, F., Fujita, J.

    Bulletin of the Chemical Society of Japan   67 ( 4 )   1994

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1246/bcsj.67.1013

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  • MOLECULAR-STRUCTURES OF HT- MM'CL2(MU-ME2PPY)2 (MM'=PD2, PDPT, AND PT2 - ME2PPY=2-(DIMETHYLPHOSPHINO)PYRIDINE) AND HT- PD2CL2(MU-PH2PPY)2 (PH2PPY=2-(DIPHENYLPHOSPHINO)PYRIDINE)

    Suzuki, T., Iitaka, N., Kurachi, S., Kita, M., Kashiwabara, K., Ohba, S., Fujita, J.

    Bulletin of the Chemical Society of Japan   65 ( 7 )   1992

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    DOI: 10.1246/bcsj.65.1817

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  • PREPARATION AND CHARACTERIZATION OF PALLADIUM(I) AND PLATINUM(I) DINUCLEAR COMPLEXES BRIDGED BY 2-(DIMETHYLPHOSPHINO)PYRIDINE

    Suzuki, T., Fujita, J.

    Bulletin of the Chemical Society of Japan   65 ( 4 )   1992

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1246/bcsj.65.1016

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  • A NEW PALLADIUM(I) DINUCLEAR COMPLEX-FORMING A COPLANAR STRUCTURE FOR 2 COORDINATION PLANES

    Suzuki, T., Fujita, J.

    Chemistry Letters   ( 6 )   1992

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1246/cl.1992.1067

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  • SYNTHESIS AND CHARACTERIZATION OF PALLADIUM(II) AND PLATINUM(II) COMPLEXES CONTAINING MONODENTATE PHOSPHORUS DONATING OR CHELATING 2-(DIMETHYLPHOSPHINO)PYRIDINE (PME2PY)

    Suzuki, T., Kita, M., Kashiwabara, K., Fujita, J.

    Bulletin of the Chemical Society of Japan   63 ( 12 )   1990

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1246/bcsj.63.3434

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Presentations

  • MII-LnIII-MII型三核錯体の絶対自然分晶におけるLnIIIイオンの効果と種結晶によるキラル制御

    高原一真,堀野優城,砂月幸成,鈴木孝義

    2020年 日本化学会中国四国支部大会 

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    Event date: 2020.11.28 - 2020.11.29

    Language:Japanese  

    Venue:オンライン  

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  • アミド-イミン型多座配位子を有するマンガン(III)多核錯体の合成

    山本健太,小川理渚、砂月幸成,鈴木孝義

    2020年 日本化学会中国四国支部大会 

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    Event date: 2020.11.28 - 2020.11.29

    Language:Japanese  

    Venue:オンライン  

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  • トリス(イミダゾール-イミン)型単核鉄(II)錯体のスキャン速度に依存したスピンクロスオーバー挙動の調査

    武谷直人,鈴木孝義、砂月幸成

    2020年 日本化学会中国四国支部大会 

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    Event date: 2020.11.28 - 2020.11.29

    Language:Japanese  

    Venue:オンライン  

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  • クロモニル基を有するピコリノイルヒドラゾン誘導体を含むLnIII錯体の酸・塩基および熱応答型発光特性

    亀井朝日,磯部 寛,稲毛正彦,鈴木孝義

    錯体化学会第70回討論会 

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    Event date: 2020.9.28 - 2020.9.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

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  • Absolute Spontaneous Resolution of MII-LnIII-MII Type Trinuclear Complexes from Achiral Tripodal Schiff Base Ligand

    Kazuma Takahara, Yuki Horino, Yukinari Sunatsuki, Takayoshi Suzuki

    日本化学会第100春季年会 

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    Event date: 2020.3.22 - 2020.3.25

    Language:English   Presentation type:Poster presentation  

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  • Mononuclear Cobalt(II or III) Hydrazonate Complexes: Synthesis, Characterization, Spectroscopic, Electrochemical and Magnetic Properties

    Acheampong, Daniel K.B, Takayoshi Suzuki, Yukinari Sunatsuki

    日本化学会第100春季年会 

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    Event date: 2020.3.22 - 2020.3.25

    Language:English   Presentation type:Poster presentation  

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  • クロモニル基を有するヒドラゾン誘導体を用いた EuIII錯体の合成とその発光特性

    亀井 朝日・砂月 幸成・稲毛正彦・鈴木 孝義

    日本化学会第100春季年会 

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    Event date: 2020.3.22 - 2020.3.25

    Language:English   Presentation type:Poster presentation  

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  • Mononuclear and Dinuclear Transition-Metal Complexes Containing Hydrazonates: Synthesis, Structures, and Spectroscopic and Electrochemical Properties

    D. Acheampong, K. Kirihara, T. Suzuki, and Y. Sunatsuki

    2019年 日本化学会中国四国支部大会 

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    Event date: 2019.11.16 - 2019.11.17

    Language:English   Presentation type:Oral presentation (general)  

    Venue:徳島  

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  • MII-LnIII-MII型三核錯体における完全自然分晶の発現条件の検討

    高原一真,堀野優城,砂月幸成,鈴木孝義

    2019年 日本化学会中国四国支部大会 

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    Event date: 2019.11.16 - 2019.11.17

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:徳島  

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  • クロモニル基を有するヒドラゾン誘導体を含む発光性EuIII錯体の合成とPdII, PtII錯体の合成

    亀井朝日,砂月幸成,稲毛正彦,鈴木孝義

    2019年 日本化学会中国四国支部大会 

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    Event date: 2019.11.16 - 2019.11.17

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:徳島  

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  • クロモニル基を有するヒドラゾン誘導体を含む遷移金属およびランタノイド錯体の合成と発光特性の検討

    亀井朝日,砂月幸成,稲毛正彦,鈴木孝義

    錯体化学会第69回討論会 

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    Event date: 2019.9.21 - 2019.9.23

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋  

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  • Synthesis and Characterization of Mononuclear Cobalt(III) and Iron(III) Complexes Containing Tridentate Hydrazonato Ligands

    D. Acheampong, K. Kirihara, T. Suzuki, and Y. Sunatsuki

    錯体化学会第69回討論会 

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    Event date: 2019.9.21 - 2019.9.23

    Language:English   Presentation type:Poster presentation  

    Venue:名古屋  

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  • Slow Mangetic Relaxation in Tetracoordinated Cobalt(II) Complexes with One-Dimensional Hydrogen-Bonded Networks

    R. Mitsuhashi, H. Hosoya T. Suzuki, Y. Sunatsuki, H. Sakiyama, and M. Mikuriya

    錯体化学会第69回討論会 

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    Event date: 2019.9.21 - 2019.9.23

    Language:English   Presentation type:Oral presentation (general)  

    Venue:名古屋  

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  • イミダゾール基を含むビス二座シッフ塩基配位子を用いた多核鉄(II)錯体の構造と性質

    田中翼,砂月幸成,鈴木孝義

    錯体化学会第69回討論会 

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    Event date: 2019.9.21 - 2019.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:名古屋  

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  • MII-LnIII-MII型三核錯体の結晶化挙動に影響する種々の結晶化条件の検証

    高原一真,堀野優城,砂月幸成,鈴木孝義

    錯体化学会第69回討論会 

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    Event date: 2019.9.21 - 2019.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:名古屋  

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  • 核酸塩基を用いたロジウム(III)およびイリジウム(III)錯体の構造および水素結合相互作用

    東恩納光甫,池田美有,砂月幸成,鈴木孝義

    2018年 日本化学会中国四国支部大会 

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    Event date: 2018.11.17 - 2018.11.18

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:松山  

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  • 8?ジフェニルホスフィノキノリン誘導体を含む新規ロジウムおよびコバルト錯体

    有元絵理佳,森壮俊, 中村豪,砂月幸成,鈴木孝義,高木秀夫

    2018年 日本化学会中国四国支部大会 

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    Event date: 2018.11.17 - 2018.11.18

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:松山  

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  • Structural characterization and racemization of transition-metal complexes bearing a Schiff base ligand derived from L-histidine methyl ester International conference

    R. Ogawa, T. Suzuki, and Y. Sunatsuki

    43rd International Conference on Coordination Chemistry 

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    Event date: 2018.7.30 - 2018.8.4

    Language:English   Presentation type:Poster presentation  

    Venue:Sendai, Japan  

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  • Hydrogen-bonding Supramolecular Assembly of S6-Symmetric Cobalt(II) Complex with Tris-bidentate Metalloligand International conference

    R. Mitsuhashi, K. Pedersen, T. Ueda, T. Suzuki, J. Bendix and M. Mikuriya

    43rd International Conference on Coordination Chemistry 

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    Event date: 2018.7.30 - 2018.8.4

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Sendai, Japan  

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  • Syntheses, crystal structures and spectroscopic studies of hydrazonato-bridged NdIII-NdIII and EuIII-EuIII dithiocarbamato dinuclear complexes International conference

    A. Yakubu, T. Suzuki, and M. Kita

    43rd International Conference on Coordination Chemistry 

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    Event date: 2018.7.30 - 2018.8.4

    Language:English   Presentation type:Poster presentation  

    Venue:Sendai, Japan  

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  • Structures and properties of group 10 metal complexes bearing 2-methyl- or 2-phenyl-8-diphenylphoshinoquinoline International conference

    M. Mori, K. Ariyoshi, Y. Sunatsuki, and T. Suzuki

    43rd International Conference on Coordination Chemistry 

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    Event date: 2018.7.30 - 2018.8.4

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Sendai, Japan  

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  • Hydrogen bonding assembling structures and spin-crossover behavior of polymorphs of iron(II) complexes with imidazole containing bidentate Schiff base ligands International conference

    Y. Sunatsuki, T. Suzuki, N. Matsumoto

    43rd International Conference on Coordination Chemistry 

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    Event date: 2018.7.30 - 2018.8.4

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Sendai, Japan  

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  • ヒドラゾン部位を含む配位子を用いた白金族金属単核および二核錯体の構造と性質

    三好航平,鈴木孝義,砂月幸成,中島清彦

    錯体化学会第68回討論会 

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    Event date: 2018.7.28 - 2018.7.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:仙台  

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  • Synthesis and Properties of transition-metal cluster complexes bearing a chiral Schiff base ligand derived from (S)-2-hydroxy-4-aminobutyrate

    奥永明音,小川理渚,磯部寛,砂月幸成,鈴木孝義

    錯体化学会第68回討論会 

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    Event date: 2018.7.28 - 2018.7.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:仙台  

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  • Structures and Magnetic Properties of Tris(oxalato)metallate(III) Encapsulated into Two-Dimensional Hydrogen-Bonded Network Constructed by Cobalt(III) Complex

    S. Sato, S. Miyahara, T. Suzuki, and Y. Sunatsuki

    錯体化学会第68回討論会 

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    Event date: 2018.7.28 - 2018.7.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:仙台  

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  • Rhodium (I) and (III) complexes bearing 8-(diphenylphsphino)quinoline and its 2-methyl or 2-phenyl derivatives

    有元絵理佳, 鈴木孝義, 中村豪, 森壮俊, 砂月幸成, 磯部寛

    錯体化学会第68回討論会 

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    Event date: 2018.7.28 - 2018.7.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:仙台  

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  • 核酸塩基アニオンが配位したロジウム(III)およびイリジウム(III)錯体の合成及びその水素結合様式

    東恩納光甫,池田美有,砂月幸成,鈴木孝義

    錯体化学会第68回討論会 

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    Event date: 2018.7.28 - 2018.7.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:仙台  

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  • アミド-イミン型およびアミド-ジ(カルボキシラト)型配位子を用いた金属錯体の合成

    守昌統,鈴木孝義,砂月幸成

    錯体化学会第68回討論会 

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    Event date: 2018.7.28 - 2018.7.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:仙台  

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  • Hydrogen-Bonded Supramolecular Structures and Magnetic Properties of Co(II) Complex with Tris-Chelate Complex as Metalloligand

    R. Mitsuhashi, T. Ueda, T. Suzuki, and M. Mikuriya

    日本化学会第98春季年会 

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    Event date: 2018.3.20 - 2018.3.23

    Language:English   Presentation type:Oral presentation (general)  

    Venue:船橋  

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  • Density Functional Study on Chemical Equilibria in the S3 State of the Oxygen-Evolving Complex of Photosystem II International conference

    H. Isobe, M. Shoji, T. Suzuki, J.-R. Shen, K. Yamaguchi

    5th International Workshop on Solar Energy for Sustainability 

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    Event date: 2018.3.20 - 2018.3.22

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Nanyang Technological University, Singapore  

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  • Thyminato-Bridged Cyclic Tetranuclear Rhodium(III) Complexes Incorporating a Sodium, Calcium or Lanthanoid Ion as a Template International conference

    H. Hosoda, M. Sakate, A. Kashima, H. Ota, Y. Sunatsuki, and T. Suzuki

    The 1st International Symposium on Coordination Ionic Compounds  2017 

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    Event date: 2017.12.15

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Toyonaka, Osaka  

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  • Investigation of Complete Spontaneous Resolution of Trinuclear Complexes

    Y. Horino, K. Wada, M. Matsushima, V. Jubault, Y. Sunatsuki, and T. Suzuki

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:札幌  

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  • Syntheses, Crystal Structures and Spectroscopic Studies of Lanthanoid(III) Dithiocarbamato Complexes

    A. Yakubu, T. Suzuki, and M. Kita

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:English   Presentation type:Oral presentation (general)  

    Venue:札幌  

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  • Synthesis and properties of multinuclear iron(II) complexes with bis-bidentate Schiff base ligands containing imidazole groups

    T. Tanaka, Y. Sunatsuki, and T. Suzuki

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌  

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  • ジフェニルホスフィノ基とヒドラゾン部位も持つ配位子を用いた白金族金属単核および二核錯体の合成

    三好航平,鈴木孝義,砂月幸成,中島清彦

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌  

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  • チミナト(2-)イオンを架橋配位子とするロジウム(III)環状四核錯体の構造と超分子化

    細田はるか,坂手美佳, 磯部寛,太田弘道, 鈴木孝義,砂月幸成

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:札幌  

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  • アミド—イミン型四座配位子を用いた多核マンガンクラスターの合成

    守昌統,小川理渚,鈴木孝義,砂月幸成

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌  

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  • Synthesis and crystal structures of (pentamethylcyclopentadienyl)rhodium(III) complexes bearing a cytosinato ion

    東恩納光甫, 池田美有, 鈴木孝義, 砂月幸成

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌  

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  • Structures and racemization of transition metal complexes with Schiff-base ligands derived from L-histidine methyl ester or L-histidine

    R. Ogawa, T. Suzuki, and Y. Sunatsuki

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌  

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  • Synthesis and Properties of S6-symmetric Cobalt(II) Complex Supported by Intermolecular Hydrogen-bonding Interaction

    R. Mitsuhashi, T. Ueda, T. Suzuki, and M. Mikuriya

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:English   Presentation type:Oral presentation (general)  

    Venue:札幌  

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  • Synthesis and crystal structures of transition-metal cluster complexes bearing a chiral Schiff base ligand derived from (S)-4-amino-2-hydroxybutyric acid

    奥永明音,小西勇介, 井上真里奈,鈴木孝義,砂月幸成

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌  

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  • Synthesis, crystal structures and spectroscopic properties of transition-metal complexes containing 8-(diphenylphosphino)quinoline and its 2-methyl or 2-phenyl derivatives

    有元絵理佳,森壮俊, 中村豪,鈴木孝義,砂月幸成

    錯体化学会第67回討論会  2017  錯体化学会

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    Event date: 2017.9.16 - 2017.9.18

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌  

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  • Thyminato-Bridged Cyclic Tetranuclear Rhodium(III) Complexes Incorporating a Sodium, Calcium or Lanthanoid Ion as a Template Metal Core International conference

    H. Hosoda, M. Sakate, A. Kashima, H. Ota, Y. Sunatsuki, and T. Suzuki

    4th EuCheMS Inorganic Chemistry Conference  2017 

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    Event date: 2017.7.2 - 2017.7.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Copenhagen, Denmark  

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  • Syntheses, crystal structures and spectroscopic studies of lanthanide(III) dithiocarbamate complexes

    A. Yakubu, M. Kita, and T. Suzuki

    日本化学会第97春季年会  2017 

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    Event date: 2017.3.16 - 2017.3.19

    Language:English   Presentation type:Oral presentation (general)  

    Venue:横浜  

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  • Hydrogen-Bonded Supramolecular Structures and Isomerisms in Tris-Chelate Co(III) Complexes with Unsymmetrical Bidentate Ligands

    R. Mitsuhashi, T. Suzuki, S. Hosoya, and M. Mikuriya

    日本化学会第97春季年会  2017 

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    Event date: 2017.3.16 - 2017.3.19

    Language:English   Presentation type:Oral presentation (general)  

    Venue:横浜  

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  • Preparation and Magnetic Properties of Mononuclear Four-coordinate Co(II) Complexes with Intermolecular Hydrogen-bonding Interactions International conference

    S. Hosoya, R. Mitsuhashi, T. Suzuki, Y. Sunatsuki, H. Sakiyama, and M. Mikuriya

    XXth International Winter School on Coordination Chemistry  2016 

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    Event date: 2016.12.5 - 2016.12.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Karpacz, Poland  

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  • Structures, Properties, and Racemization Reaction of Transition Metal Complexes with a Schiff Base Derived from L-Histidine Methyl Ester and Salicylaldehyde International conference

    R. Ogawa, T. Suzuki, and Y. Sunatsuki

    XXth International Winter School on Coordination Chemistry  2016 

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    Event date: 2016.12.5 - 2016.12.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Karpacz, Poland  

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  • Tris-chelate Cobalt Complexes with Unsymmetrical Phenolate-type Ligands International conference

    R. Mitsuhashi, T. Suzuki, S. Hosoya, and M. Mikuriya

    XXth International Winter School on Coordination Chemistry  2016 

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    Event date: 2016.12.5 - 2016.12.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Karpacz, Poland  

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  • Racemization Reaction of Transition Metal Complexes with Schiff Base Ligand Derived from L-Histidine Methyl Ester International conference

    Rina Ogawa, T. Suzuki, Y. Sunatsuki, and M. Hirotsu

    The 23rd International SPACC Symposium  2016 

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    Event date: 2016.11.21 - 2016.11.23

    Language:English   Presentation type:Poster presentation  

    Venue:岡山  

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  • Group 10 Metal Complexes Bearing 2-Methyl- or 2-Phenyl-8-diphenylphosphinoquinoline International conference

    Takayoshi Suzuki

    The 23rd International SPACC Symposium  2016 

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    Event date: 2016.11.21 - 2016.11.23

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:岡山  

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  • Oxidation Reactions and Magnetic Properties of Co(II) Complexes with Strand-Type Hexadentate Ligands Having Thioether-Amidato-Pyridyl Donor Set International conference

    Y. Sunatsuki, Y. Yamane, T. Tada, T. Suzuki, and M. Kojima

    The 23rd International SPACC Symposium  2016 

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    Event date: 2016.11.21 - 2016.11.23

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:岡山  

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  • Structures and Magnetic Properties of Four-coordinate Cobalt(II) Complexes with N?O? type Bidentate Ligands International conference

    S. Hosoya, R. Mitsuhashi, T. Suzuki, Y. Sunatsuki, H. Sakiyama, and M. Mikuriya

    The 23rd International SPACC Symposium 

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    Event date: 2016.11.21 - 2016.11.23

    Language:English   Presentation type:Poster presentation  

    Venue:岡山  

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  • R-2-(5-メチルイミダゾリン-2-イル)フェノレート配位子を用いたコバルト錯体の合成と性質

    植田貴明,三橋了爾,鈴木孝義,御厨正博

    2016年日本化学会中国四国支部大会  2016 

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    Event date: 2016.11.5 - 2016.11.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:高松  

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  • 非対称二座配位子を用いた四配位コバルト(II)錯体の構造と磁気的性質

    細谷聡,三橋了爾,鈴木孝義,砂月幸成,崎山博史,御厨正博

    2016年日本化学会中国四国支部大会  2016 

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    Event date: 2016.11.5 - 2016.11.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:高松  

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  • イミダゾール基を含むビス(二座配位)型シッフ塩基を用いた二核鉄(II)錯体の合成

    田中翼,砂月幸成,鈴木孝義

    2016年日本化学会中国四国支部大会  2016 

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    Event date: 2016.11.5 - 2016.11.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:高松  

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  • 金属イオンをテンプレートとしたチミナト(2?)架橋ロジウム(III)環状四核錯体の合成

    細田はるか,坂手美佳, 太田弘道, 鈴木孝義,砂月幸成

    2016年日本化学会中国四国支部大会 

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    Event date: 2016.11.5 - 2016.11.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:高松  

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  • Studies on the Sluggish Electron Transfer Reactions Involving Cu(II)/(I)-[12]aneS4 Complexes in Acetonitrile

    K. Sakadani, A. Yamada, T. Suzuki, K. Ishihara, M. Inamo, and H. D. Takagi

    錯体化学会第66回討論会  2016  錯体化学会

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    Event date: 2016.9.10 - 2016.9.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:福岡  

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  • Synthesis and Properties of Nickel, Palladium and Platinum Complexes Containing 2-Substituted 8-(Diphenylphosphino)quinolines

    M. Mori, T. Suzuki, and Y. Sunatsuki

    錯体化学会第66回討論会  2016  錯体化学会

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    Event date: 2016.9.10 - 2016.9.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:福岡  

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  • Complete Spontaneous Resolution of Zn-Tb-Zn Type Trinuclear Complexes with Tripodal Ligands

    Y. Horino, M. Matsushima, K. Wada, M. Isozaki Y. Yunatsuki, and T. Suzuki

    錯体化学会第66回討論会  2016  錯体化学会

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    Event date: 2016.9.10 - 2016.9.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:福岡  

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  • イミダゾール基を含むビス(二座配位)型シッフ塩基を用いた二核鉄(II)錯体の合成と性質

    田中翼,砂月幸成,鈴木孝義

    錯体化学会第66回討論会  2016  錯体化学会

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    Event date: 2016.9.10 - 2016.9.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:福岡  

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  • カルシウムイオンと有機アニオンを用いたロジウム(III)-チミナト(2‐)環状四核ユニットの連結

    細田はるか,坂手美佳, 太田弘道, 鈴木孝義,砂月幸成

    錯体化学会第66回討論会  2016  錯体化学会

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    Event date: 2016.9.10 - 2016.9.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:福岡  

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  • 水素結合ドナーとアクセプターを有する非対称二座配位子を用いた四配位コバルト(II)錯体の合成と性質

    細谷聡,三橋了爾,鈴木孝義,砂月幸成,崎山博史,御厨正博

    錯体化学会第66回討論会  2016  錯体化学会

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    Event date: 2016.9.10 - 2016.9.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:福岡  

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  • Structures and properties of transition metal complexes with Schiff-base ligands derived from L-histidine or L-histidine methyl ester

    R. Ogawa, T. Suzuki, Y. Sunatsuki, and M. Hirotsu

    錯体化学会第66回討論会  2016  錯体化学会

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    Event date: 2016.9.10 - 2016.9.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:福岡  

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  • Isomerism and Construction of Supramolecular Structure Induced by Intermolecular Hydrogen Bond in Cobalt(III) Tris-chelate Complex with Unsymmetrical Bidentate Ligand

    R. Mitsuhashi, T. Suzuki, S. Hosoya, and M. Mikuriya

    錯体化学会第66回討論会  2016  錯体化学会

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    Event date: 2016.9.10 - 2016.9.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:福岡  

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  • Geometrical Isomerization and Redox Behavior of Ruthenium Complexes with Unsymmetrical Bidentate Ligand International conference

    R. Mitsuhashi, T. Suzuki, and M. Mikuriya

    42nd International Conference on Coordination Chemistry  2016 

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    Event date: 2016.7.4 - 2016.7.8

    Language:English   Presentation type:Poster presentation  

    Venue:Brest, France  

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  • Thyminato-bridged cyclic tetranuclear rhodium(III) complexes containing a calcium ion as a template metal core International conference

    T. Suzuki, H. Hosoda, M. Sakate, A. Kashima, H. Ota, and Y. Sunatsuki

    42nd International Conference on Coordination Chemistry  2016 

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    Event date: 2016.7.4 - 2016.7.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Brest, France  

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  • Synthesis, structures, magnetic properties and oxidation reactions of Co(II) complexes with strand-type hexadentate ligands having thioether-amidato-pyridyl donor set International conference

    Y. Sunatsuki, Y. Yamane, T. Tada, T. Suzuki, and M. Kojima

    42nd International Conference on Coordination Chemistry  2016 

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    Event date: 2016.7.4 - 2016.7.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Brest, France  

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  • Synthesis, structures, and properties of mononuclear transition-metal complexes with Schiff base ligands derived from L-histidine International conference

    R. Ogawa, T. Suzuki, and Y. Sunatsuki

    42nd International Conference on Coordination Chemistry  2016 

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    Event date: 2016.7.4 - 2016.7.8

    Language:English   Presentation type:Poster presentation  

    Venue:Brest, France  

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  • Complete Spontaneous Resolution: Peculiar Crystallization Phenomena of Chiral Metal Complexes International conference

    Takayoshi Suzuki

    Conférence LCC  2016  University of Toulouse III

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    Event date: 2016.7.4

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Toulouse, France  

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  • Geometrical Isomers and Redox Properties of Ruthenium(II/III) Complexes with 3-Hydroxypicolinamide Ligand

    R. Mitsuhashi, T. Suzuki, and M. Mikuriya

    日本化学会第96春季年会  2016 

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    Event date: 2016.3.25 - 2016.3.28

    Language:English   Presentation type:Oral presentation (general)  

    Venue:京田辺  

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  • リチウムまたはカルシウムイオンが結合した不完全キュバン型マンガンクラスターの構築

    小西勇介,井上真里奈,鈴木孝義,砂月幸成

    日本化学会第96春季年会  2016 

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    Event date: 2016.3.25 - 2016.3.28

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    Venue:京田辺  

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  • 三脚状配位子を含むZn-Tb-Zn三核錯体における完全自然分晶の検証

    堀野優城,和田公輝,松島美咲,磯崎麻奈美,鈴木孝義,砂月幸成

    日本化学会第96春季年会  2016 

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    Event date: 2016.3.25 - 2016.3.28

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    Venue:京田辺  

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  • Synthesis and properties of multinuclear iron(II) complexes bridged by bis-bidentate type Schiff base ligands containing imidazole groups

    T. Tanaka, Y. Sunatsuki, and T. Suzuki

    日本化学会第96春季年会  2016 

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    Event date: 2016.3.25 - 2016.3.28

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    Venue:京田辺  

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  • Synthesis and Properties of Nickel, Palladium and Platinum Complexes Containing 2-Methyl-8-(diphenylphosphino)quinoline

    M. Mori, K. Ariyoshi, T. Suzuki, and Y. Sunatsuki

    日本化学会第96春季年会  2016 

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    Event date: 2016.3.25 - 2016.3.28

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    Venue:京田辺  

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  • 非配位N-H基を有する新規鉄錯体の合成と分子間水素結合による超分子構造

    三橋了爾,細谷聡,鈴木孝義,御厨正博

    日本化学会第96春季年会  2016 

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    Event date: 2016.3.25 - 2016.3.28

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    Venue:京田辺  

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  • Multinuclear iron(II) complexes bridged by tetradentate bis(Schiff base)-type ligands International conference

    T. Tanaka, Y. Sunatsuki, and T. Suzuki

    2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)  2015 

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    Event date: 2015.12.15 - 2015.12.20

    Language:English   Presentation type:Poster presentation  

    Venue:Honolulu, HI, U.S.A.  

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  • Synthesis, crystal structure and magnetic properties of the face-shared triply bridged linear trinuclear complexes International conference

    Y. Sunatsuki, T. Kobayashi, T. Fujino, M. Iwayama, M. Kojima, T. Suzuki, N. Matsumoto and N. Re

    2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)  2015 

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    Event date: 2015.12.15 - 2015.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Geometrical Isomerization and Redox Behavior of Ruthenium Complexes with Unsymmetrical Bidentate Ligand International conference

    R. Mitsuhashi, T. Suzuki, and M. Mikuriya

    2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)  2015 

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    Event date: 2015.12.15 - 2015.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Chromotropism of hydrido-bridged dinuclear rhodium(III) complexes containing a tripodal tridentate phosphine ligands International conference

    M. Kashihara, T. Suzuki, and Y. Sunatsuki

    2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)  2015 

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    Event date: 2015.12.15 - 2015.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Synthesis and structures of platinum(II) complexes containing 8-(dimethyl or diphenylphosphino)quinoline International conference

    M. Mori, T. Suzuki, and Y. Sunatsuki

    2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)  2015 

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    Event date: 2015.12.15 - 2015.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Palladium(II) mononuclear and palladium(II)/ruthenium(II) heterodinuclear complexes bearing a quinoline-2-carbaldehyde (pyridine-2-carbonyl)hydrazone International conference

    A. Mori, Y. Nakatani, T. Suzuki, Y. Sunatsuki, and K. Nakajima

    2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)  2015 

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    Event date: 2015.12.15 - 2015.12.20

    Language:English   Presentation type:Poster presentation  

    Venue:Honolulu, HI, U.S.A.  

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  • Synthesis, structures, and properties of mono-, di-, and tetranuclear manganese complexes with unsymmetrical tridentate ligands derived from N-(aminoalkyl)salicylamide International conference

    R. Ogawa, R. Mitsuhashi, T. Suzuki, Y. Sunatsuki, R. Ishikawa, and S. Kawata

    2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)  2015 

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    Event date: 2015.12.15 - 2015.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Magnetic behaviors and oxidation reactions of cobalt(II) complexes with strand-type hexadentate ligands containing thioether and amidate donor groups International conference

    Magnetic behaviors and oxidation reactions of cobalt(II) complexes with strand-type hexadentate ligands containing thioether and amidate donor groups

    2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)  2015 

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    Event date: 2015.12.15 - 2015.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Thyminate(2?)-bridged cyclic tetranuclear rhodium(III) complexes formed by a template of a sodium, calcium or lanthanoid ion International conference

    T. Suzuki, A. Kashima, M. Sakate, H. Ota, A. Fuyuhiro, and Y. Sunatsuki

    2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015) 

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    Event date: 2015.12.15 - 2015.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • 8位にホスフィノ基を有するキノリン誘導体を含む新規パラジウム(II)、白金(II)錯体の合成と性質

    森壮俊,有吉慧太,鈴木孝義,砂月幸成

    2015年日本化学会中国四国支部大会  2015 

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    Event date: 2015.11.14 - 2015.11.15

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    Venue:岡山  

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  • L-ヒスチジンメチルエステルから誘導したシッフ塩基を含む遷移金属錯体の構造と酸化還元

    小川理渚,鈴木孝義,砂月幸成

    2015年日本化学会中国四国支部大会  2015 

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    Event date: 2015.11.14 - 2015.11.15

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    Venue:岡山  

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  • Structures and Redox Properties of Ruthenium(II/III) Complexes with 3-Hydroxypicolinamide Ligand

    R. Mitsuhashi, T. Suzuki, and M. Mikuriya

    2015年日本化学会中国四国支部大会  2015 

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    Event date: 2015.11.14 - 2015.11.15

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    Venue:岡山  

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  • Development of teaching materials on optical activity and magnetic optical activity

    Y. Abdallah, T. Suzuki, and M. Kita

    2015年日本化学会中国四国支部大会  2015 

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    Event date: 2015.11.14 - 2015.11.15

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    Venue:岡山  

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  • 三脚状三座ホスフィン配位子を含むヒドリド架橋二核ロジウム(III)錯体のクロモトロピズム

    樫原慎,鈴木孝義,砂月幸成

    2015年日本化学会中国四国支部大会  2015 

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    Event date: 2015.11.14 - 2015.11.15

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    Venue:岡山  

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  • チオエーテルとアミダトおよびピリジル供与基を含む直鎖型六座配位子を用いたコバルト(II)錯体のスピンクロスオーバーと酸化反応

    多田敏基,山根優希,砂月幸成,鈴木孝義,小島正明

    2015年日本化学会中国四国支部大会  2015 

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    Event date: 2015.11.14 - 2015.11.15

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    Venue:岡山  

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  • 2-キノリル置換基を含むピリジル-2-カルボニルヒドラゾンを用いたパラジウム(II)/ルテニウム(II)錯体の合成と性質

    中谷友一,森麻美,鈴木孝義,砂月幸成,中島清彦

    2015年日本化学会中国四国支部大会  2015 

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    Event date: 2015.11.14 - 2015.11.15

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    Venue:岡山  

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  • イミダゾール基を含むbis-bidentate型シッフ塩基配位子を用いた多核鉄(II)錯体の合成と性質

    田中翼,砂月幸成,鈴木孝義

    2015年日本化学会中国四国支部大会  2015 

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    Event date: 2015.11.14 - 2015.11.15

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    Venue:岡山  

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  • カルシウムイオンをテンプレートとしたチミナト(2?)架橋ロジウム(?)環状四核錯体の構造

    細田はるか,坂手美佳,加島彩菜,太田弘道,鈴木孝義,砂月幸成

    2015年日本化学会中国四国支部大会 

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    Event date: 2015.11.14 - 2015.11.15

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    Venue:岡山  

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  • 非配位N?H結合を有する新規鉄(III)錯体の合成と水素結合相互作用

    細谷聡,三橋了爾,鈴木孝義,御厨正博

    2015年日本化学会中国四国支部大会 

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    Event date: 2015.11.14 - 2015.11.15

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    Venue:岡山  

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  • 三脚状三座ホスフィン配位子を含むヒドリド架橋二核ロジウム(III)錯体の光応答性

    樫原慎,鈴木孝義,砂月幸成, 篠崎一英, 高安敏

    錯体化学会第65回討論会  2015  錯体化学会

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    Event date: 2015.9.21 - 2015.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:奈良  

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  • チオエーテルとアミダトおよびピリジル供与基を含む直鎖状六座配位子を用いたコバルト(II/III) 錯体の合成と性質

    多田敏基,山根優希,砂月幸成,鈴木孝義,小島正明

    錯体化学会第65回討論会  2015  錯体化学会

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    Event date: 2015.9.21 - 2015.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:奈良  

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  • ヒドラゾン骨格を有する非対称三座配位子を用いたルテニウム(II)錯体の合成と性質

    中谷友一,森麻美,秋山紗恵子,鈴木孝義,砂月幸成

    錯体化学会第65回討論会  2015  錯体化学会

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    Event date: 2015.9.21 - 2015.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:奈良  

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  • イミダゾール基を含むbis-bidentate型シッフ塩基を用いた多核鉄(II)錯体の合成

    田中翼,砂月幸成,鈴木孝義

    錯体化学会第65回討論会  2015  錯体化学会

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    Event date: 2015.9.21 - 2015.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:奈良  

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  • 8位にホスフィノ基を有するキノリン誘導体を含む新規白金錯体の合成と性質

    森壮俊,鈴木孝義,砂月幸成

    錯体化学会第65回討論会  2015  錯体化学会

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    Event date: 2015.9.21 - 2015.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:奈良  

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  • Spontaneous Resolution of Transition-Metal Complexes Containing a Tripodal Hexadentate Schiff-Base Ligand Derived from 1,1,1-Tris(2-aminomethyl)ethane and 4-Formylimidazole

    M. Matsushima, K. Wada, T. Suzuki, and Y. Sunatsuki

    錯体化学会第65回討論会  2015  錯体化学会

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    Event date: 2015.9.21 - 2015.9.23

    Language:English   Presentation type:Oral presentation (general)  

    Venue:奈良  

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  • L-ヒスチジンから誘導したシッフ塩基を含む遷移金属錯体の合成と性質

    小川理渚,鈴木孝義,砂月幸成,廣津昌和

    錯体化学会第65回討論会  2015  錯体化学会

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    Event date: 2015.9.21 - 2015.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:奈良  

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  • Flipping of Coordinated Triazine Moiety in Cu(II)?L2 and Small Electronic Factor, κel, for Direct Outer-Sphere Cross Reactions (L = 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine)

    T. Mabe, A. Yamada, Y. Wasada, M. Inamo, K. Ishihara, T. Suzuki, and H. D. Takagi

    錯体化学会第65回討論会  錯体化学会

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    Event date: 2015.9.21 - 2015.9.23

    Language:English   Presentation type:Oral presentation (general)  

    Venue:奈良  

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  • 1H-イミダゾール-4-カルバルデヒド-2-ピリジルヒドラゾン誘導体を含むルテニウム(II)錯体の合成と構造および性質

    中谷友一,鈴木孝義,砂月幸成,森麻美,秋山紗恵子

    日本化学会第95春季年会  2015 

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    Event date: 2015.3.26 - 2015.3.29

    Language:Japanese   Presentation type:Poster presentation  

    Venue:船橋  

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  • チオエーテルおよびアミダト供与基を含む直鎖状六座配位子を用いたコバルト(II/III) 錯体の磁気的性質と酸化反応

    多田敏基,山根優希,砂月幸成,鈴木孝義,小島正明

    日本化学会第95春季年会  2015 

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    Event date: 2015.3.26 - 2015.3.29

    Language:Japanese   Presentation type:Poster presentation  

    Venue:船橋  

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  • L-ヒスチジンから誘導したシッフ塩基を含む金属錯体の合成と性質

    小川理渚,鈴木孝義,砂月幸成

    日本化学会第95春季年会  2015 

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    Event date: 2015.3.26 - 2015.3.29

    Language:Japanese   Presentation type:Poster presentation  

    Venue:船橋  

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  • L-ヒスチジンとサリチルアルデヒドから誘導したシッフ塩基を含む金属錯体の合成と性質

    小川理渚,鈴木孝義,砂月幸成

    2014年日本化学会中国四国支部大会  2014 

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    Event date: 2014.11.8 - 2014.11.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山口  

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  • 1,1,1-トリスアミノメチルエタンから誘導される三脚型シッフ塩基配位子を用いた異種金属三核錯体の合成と性質

    岩山美佳子, 藤野妙恵, 小林玉実, 鈴木孝義, 砂月幸成, 小島正明

    2014年日本化学会中国四国支部大会  2014 

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    Event date: 2014.11.8 - 2014.11.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山口  

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  • チミナト(2?)を架橋配位子に用いたロジウム(III)環状四核錯体の構造と性質

    坂手美佳,加島彩菜,鈴木孝義,砂月幸成,太田弘道,冬広明

    2014年日本化学会中国四国支部大会 

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    Event date: 2014.11.8 - 2014.11.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山口  

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  • Hydrogen-Bonding Interaction between Transition-Metal Complexes Containing Nucleobase Anions

    T. Suzuki, M. Ikeda, A. Takayama, Y. Sunatsuki

    「新規分子磁性化合物の探索」2014年シンポジウム  2014  関西学院大学錯体分子素子研究センター

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    Event date: 2014.10.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:三田  

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  • (Pentamethylcyclopentadienyl)rhodium(III) Complexes Containing Nucleobase Anions: Thyminate-bridged Cyclic Tetramers and Base-pairing Complex Dimers

    T. Suzuki

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:English   Presentation type:Oral presentation (general)  

    Venue:東京  

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  • Ir錯体の固体発光に及ぼす光照射の影響の研究

    高安敏,鈴木孝義,篠崎一英

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京  

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  • ホスフィンで置換されたルテニウム(II)ポリピリジル錯体の合成と反応性

    中村豪,岡村将也,吉田将己,柴田あかね,鈴木孝義,高木秀夫,近藤美欧,Peter C. Ford,正岡重行

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京  

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  • リンを配位原子とする高機能有機配位子の配位した低スピンMn(I), Mn(II)錯体の合成・構造とその反応挙動に関する研究

    間部拓哉,山口浩史,鈴木孝義,高木秀夫

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Poster presentation  

    Venue:東京  

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  • ヒドラゾン骨格を有するRu錯体のプロトン付加解離と酸化還元挙動

    森麻美,砂月幸成,中島清彦,鈴木孝義

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Poster presentation  

    Venue:東京  

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  • キラルな多座シッフ塩基配位子を用いたMnクラスターの構築

    井上真里奈,鈴木孝義,砂月幸成,冬広明,Re Nazzareno

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京  

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  • 三脚型六座配位子を用いた面共有三核錯体の合成と性質

    岩山美佳子,藤野妙恵,小林玉実,鈴木孝義,砂月幸成,小島正明

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Poster presentation  

    Venue:東京  

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  • イミダゾール基を含む三脚型シッフ塩基配位子の鉄錯体を構築素子とする異種金属多核錯体の構造と性質

    松島美咲,鈴木孝義,砂月幸成

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Poster presentation  

    Venue:東京  

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  • 非対称アミン-アミド-フェノール型三座配位子を用いたマンガン錯体の合成と構造

    小川理渚,三橋了爾,鈴木孝義,砂月幸成,石川立太,川田知

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Poster presentation  

    Venue:東京  

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  • クロモトロピズムを示すヒドリド架橋二核ロジウム(III)錯体における共存配位子の効果

    樫原慎,鈴木孝義,砂月幸成, 篠崎一英, 高安敏

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Poster presentation  

    Venue:東京  

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  • チオエーテルおよびアミダト供与基を含む直鎖型六座配位子を用いたコバルト(II)錯体のスピンクロスオーバー

    多田敏基,山根優希,鈴木孝義,砂月幸成,小島正明

    錯体化学会第64回討論会  2014  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Poster presentation  

    Venue:東京  

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  • Thyminate(2?)を架橋配位子に用いたCp*Rh環状四核錯体の構造と性質

    坂手美佳,加島彩菜,鈴木孝義,砂月幸成,太田弘道,冬広明

    錯体化学会第64回討論会  錯体化学会

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    Event date: 2014.9.18 - 2014.9.21

    Language:Japanese   Presentation type:Poster presentation  

    Venue:東京  

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  • Simultaneous Oxidation and Deprotonation of Substituted Hydrazone Ruthenium(II) Complex International conference

    A. Mori, K. Nakajima, Y. Sunatsuki, and T. Suzuki

    Workshop and knowledge transfer on advanced spectroscopy and theoretical modeling of bioinorganic systems  2014  University of Copenhagen

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    Event date: 2014.6.17 - 2014.6.19

    Language:English   Presentation type:Poster presentation  

    Venue:Denmark  

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  • Multi-electron Oxidative Dehydrogenation in Ruthenium(III) Complexes International conference

    R. Mitsuhashi, T. Suzuki, Y. Sunatsuki

    Workshop and knowledge transfer on advanced spectroscopy and theoretical modeling of bioinorganic systems  2014  University of Copenhagen

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    Event date: 2014.6.17 - 2014.6.19

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Denmark  

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  • Peculiar Examples of Crystallization of Chiral Metal Complexes: Kryptoracemate and Complete Spontaneous Resolution International conference

    Takayaoshi Suzuki

    Workshop and knowledge transfer on advanced spectroscopy and theoretical modeling of bioinorganic systems  2014  University of Copenhagen

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    Event date: 2014.6.17 - 2014.6.19

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Denmark  

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  • Attempts in Preparing Transition-Metal Complexes with L-histidine Derivatives toward Manganese Oxido Cluster International conference

    R. Ogawa, Y. Sunatsuki, T. Suzuki

    Workshop and knowledge transfer on advanced spectroscopy and theoretical modeling of bioinorganic systems  2014  University of Copenhagen

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    Event date: 2014.6.17 - 2014.6.19

    Language:English   Presentation type:Poster presentation  

    Venue:Denmark  

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  • ヒドラゾン化合物を配位子とするRu(II)錯体におけるプロトン解離に伴う酸化挙動

    森麻美,中島清彦,砂月幸成,鈴木孝義

    日本化学会第94春季年会  2014 

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    Event date: 2014.3.27 - 2014.3.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:名古屋  

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  • Mn^2+^イオンで架橋した二重不完全キュバン型構造をもつ(Mn^III^~3~)~2~Mn^II~クラスターの構築

    井上真里奈,鈴木孝義,砂月幸成,冬広明,Re Nazzareno

    日本化学会第94春季年会  2014 

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    Event date: 2014.3.27 - 2014.3.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋  

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  • 三脚状三座ホスフィン配位子を含むヒドリド架橋二核ロジウム(III)錯体のクロモトロピズム

    樫原慎,鈴木孝義,砂月幸成, 篠崎一英, 高安敏

    日本化学会第94春季年会  2014 

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    Event date: 2014.3.27 - 2014.3.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:名古屋  

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  • チオエーテルおよびアミダト供与基を含む直鎖型六座配位子を用いたコバルト(II/III)錯体の合成と性質

    多田敏基,山根優希,鈴木孝義,砂月幸成,小島正明

    日本化学会第94春季年会  2014 

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    Event date: 2014.3.27 - 2014.3.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:名古屋  

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  • Peculiar Examples of Crystallization of Chiral Metal complexes: Kryptoracemate and Complete Spontaneous Resolution

    T. Suzuki

    International Kick-Off Symposium for ISMCBC  2013  熊本大学 ISMCBCコア

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    Event date: 2013.12.2

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:熊本  

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  • ヒドロキシル基またはカルボキシル基を持つ単座ホスフィン配位子を含むコバルト(III)錯体の合成と性質

    山口翔平,砂月幸成,鈴木孝義

    2013年日本化学会中国四国支部大会  2013 

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    Event date: 2013.11.16 - 2013.11.17

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東広島  

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  • 三脚型Schiff塩基配位子を用いた単核バナジル錯体とその多核化の検討

    足立光太郎,砂月幸成,鈴木孝義

    2013年日本化学会中国四国支部大会  2013 

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    Event date: 2013.11.16 - 2013.11.17

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東広島  

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  • Thyminato(1−)-κN1またはadeninato-κN9を配位子とするRh(III)およびIr(III)錯体の合成とその水素結合相互作用

    池田美有,高山明日香,砂月幸成,鈴木孝義

    錯体化学会第63回討論会  2013 

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    Event date: 2013.11.2 - 2013.11.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:沖縄  

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  • 2-位を修飾した 8-キノリルホスファンを含む遷移金属錯体の合成と性質

    有吉慧太,砂月幸成,鈴木孝義

    錯体化学会第63回討論会  2013 

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    Event date: 2013.11.2 - 2013.11.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:沖縄  

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  • (S)-4-アミノ-2-ヒドロキシ酪酸から誘導した Schiff 塩基配位子を用いた三核 Mn クラス ターの構築

    井上真里奈,鈴木孝義,砂月幸成,冬広明

    錯体化学会第63回討論会  2013 

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    Event date: 2013.11.2 - 2013.11.4

    Language:Japanese   Presentation type:Poster presentation  

    Venue:沖縄  

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  • 4−ホルミルイミダゾールから誘導される三脚型六座シッフ塩基配位子を含む単核 錯体の対イオン効果による特異な結晶化挙動

    松島美咲,和田公輝,鈴木孝義,砂月幸成

    錯体化学会第63回討論会  2013 

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    Event date: 2013.11.2 - 2013.11.4

    Language:Japanese   Presentation type:Poster presentation  

    Venue:沖縄  

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  • 三脚型 Schiff 塩基配位子を用いたバナジル錯体の合成と性質

    足立光太郎,鈴木孝義,砂月幸成

    錯体化学会第63回討論会  2013 

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    Event date: 2013.11.2 - 2013.11.4

    Language:Japanese   Presentation type:Poster presentation  

    Venue:沖縄  

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  • 特異な置換基を有する単座リン供与配位子を含むコバルト(III)錯体の合成と性質

    山口翔平,砂月幸成,鈴木孝義

    錯体化学会第63回討論会  2013 

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    Event date: 2013.11.2 - 2013.11.4

    Language:Japanese   Presentation type:Poster presentation  

    Venue:沖縄  

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  • 面共有型架橋構造を有するFeII-MII-FeII型三核錯体の合成と性質

    岩山美佳子,藤野妙恵,小林玉実,鈴木孝義,砂月幸成,小島正明

    錯体化学会第63回討論会  2013 

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    Event date: 2013.11.2 - 2013.11.4

    Language:Japanese   Presentation type:Poster presentation  

    Venue:沖縄  

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  • 非極性溶媒中におけるIr(ppy)3の分子間相互作用と会合に関する研究

    高安敏,佐藤享平,鈴木孝義,篠崎一英

    錯体化学会第63回討論会  2013 

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    Event date: 2013.11.2 - 2013.11.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:沖縄  

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  • Four-electron Oxidative Dehydrogenation Induced by Proton-coupled Electron transfer in Ruthenium(III) Complex with 2-(1,4,5,6-Tetrahydropyrimidin-2-yl)phenolate

    R. Mitsuhashi, T. Suzuki, Y. Sunatsuki

    錯体化学会第63回討論会  2013 

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    Event date: 2013.11.2 - 2013.11.4

    Language:English   Presentation type:Oral presentation (general)  

    Venue:沖縄  

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  • ヒドラゾン化合物を架橋配位子に用いた Ru−3d 金属二核錯体の合成と性質

    森麻美,中島清彦,砂月幸成,鈴木孝義

    錯体化学会第63回討論会  2013 

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    Event date: 2013.11.2 - 2013.11.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:沖縄  

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  • Cp*Rh環状四核錯体に取り込まれた陽イオンによるthyminate(2?)の架橋構造変換

    坂手美佳,加島彩菜,砂月幸成,鈴木孝義,冬広明

    錯体化学会第63回討論会 

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    Event date: 2013.11.2 - 2013.11.4

    Language:Japanese   Presentation type:Poster presentation  

    Venue:沖縄  

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  • Redox Behavior of Ruthenium(II/III) Complex with 2-(1,4,5,6-Tetrahydropyrimidyl)phenolate Ligand

    R. Mitsuhashi, T. Suzuki, Y. Sunatsuki

    「新規分子磁性化合物の探索」2013年シンポジウム  2013  関西学院大学錯体分子素子研究センター

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    Event date: 2013.10.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:三田  

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  • Cyclic Tetranuclear Rhodium(III) Complexes Bridged by Thyminate(2?) and Incorporating an Alkali, Alkali Earth or Lanthanide Ion

    T. Suzuki, A. Kashima, M. Sakate, Y. Sunatsuki, A. Fuyuhiro

    「新規分子磁性化合物の探索」2013年シンポジウム  関西学院大学錯体分子素子研究センター

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    Event date: 2013.10.12

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    Venue:三田  

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  • 2-(1,4,5,6-テトラヒドロピリミジル)-2-フェノレート配位子を用いたルテニウム錯体の塩基応答性酸化還元挙動

    三橋了爾,鈴木孝義,砂月幸成

    日本化学会第93春季年会  2013 

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    Event date: 2013.3.22 - 2013.3.25

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:草津  

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  • トリス(ヒドロキシメチル)ホスフィンを含むコバルト(III)錯体の合成と性質

    山口翔平,砂月幸成,鈴木孝義

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山  

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  • SOCの発現を目指したヒドラゾン部位を含む非対称配位子を用いたコバルト(II)錯体の構築

    秋山紗恵子,小島正明,砂月幸成,中島清彦,鈴木孝義

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山  

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  • ヒドラゾン化合物を架橋配位子とした異種二核金属錯体の合成とその電子状態

    森麻美,中島清彦,砂月幸成,鈴木孝義

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山  

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  • テトラヒドロピリミジル基またはイミダゾリニル基を有するフェノレート配位子を用いたRu(II/III)錯体の酸化還元挙動

    三橋了爾,鈴木孝義,砂月幸成

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山  

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  • 8−ジフェニルホスフィノキノリンの配位したマンガン(I)および鉄(II)錯体の合成と構造

    間部拓哉,鈴木孝義,稲毛正彦,石原浩二,高木秀夫

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山  

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  • N,N’−ビス(4−イミダゾリルメチレン)トリアミン型五座配位子を用いたNi(II)錯体の合成と性質

    足立光太郎,鈴木孝義,砂月幸成

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山  

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  • 三脚型シッフ塩基配位子を含むMII−LnIII−MII三核錯体の完全自然分晶

    和田公輝,鈴木孝義,砂月幸成,小島正明

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山  

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  • P−N型二座配位子を含むRu(II)錯体の合成と酸化還元反応

    中村豪,鈴木孝義,高木秀夫,岡村将也,吉田将己,近藤美欧,正岡重行

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山  

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  • 核酸塩基を配位子とする新規金属錯体の合成とその水素結合相互作用

    池田美有,高山明日香,砂月幸成,鈴木孝義

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山  

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  • 2−位に嵩高い置換基を持つ8−ホスファニルキノリンを含む遷移金属錯体の合成と性質

    有吉慧太,鈴木孝義

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山  

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  • Effects of metal complexes on inclusion of surfactants and α, β, γ-cyclodextrins

    Keo Vanthoeun, Takayoshi Suzuki, Haruka Yamazaki, Hiroyuki Ishida, Masakazu Kita

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:English   Presentation type:Poster presentation  

    Venue:富山  

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  • Redox potentials of Fe(II)−NO complexes with optically active dithiocarbamates

    Abukari Moses Abdullai, Takayoshi Suzuki, Yoshimi Sueishi, Masakazu Kita

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:English   Presentation type:Poster presentation  

    Venue:富山  

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  • テトラゾラト誘導体を架橋配位子として用いたパラジウム(II)を含む異種金属二核錯体の立体構造制御

    金山晶彦,竹原佑太郎,木原恵子,砂月幸成,鈴木孝義

    2012年日本化学会西日本大会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山  

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  • イミダゾール−4−カルボアルデヒドアジン類を配位子とする単核及び多核錯体の合成と性質

    内藤大士,鈴木孝義,砂月幸成,小島正明

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山  

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  • 結晶構造変化に伴う白金(II)錯体の発光色制御

    藤田清実,鈴木孝義,篠崎一英

    錯体化学会第62回討論会  2012 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山  

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  • Thyminate(2?)を構成ユニットとするCp*Rh(III)四核錯体

    加島彩菜,砂月幸成,鈴木孝義,冬広明

    錯体化学会第62回討論会 

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    Event date: 2012.9.21 - 2012.9.23

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山  

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  • 遷移金属とランタノイドを含む三核錯体における完全自然分晶

    磯崎麻奈美,和田公輝,山口友佳,砂月幸成,鈴木孝義,小島正明

    日本化学会第92春季年会  2012 

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    Event date: 2012.3.25 - 2012.3.28

    Language:Japanese   Presentation type:Poster presentation  

    Venue:横浜  

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  • ホスフィン−テトラゾラト型配位子を含む遷移金属錯体配位子を用いた異種金属二核錯体の合成と性質

    竹原佑太郎,鈴木孝義,砂月幸成

    日本化学会第92春季年会  2012 

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    Event date: 2012.3.25 - 2012.3.28

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:横浜  

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  • 非対称三座アミン−アミダト型配位子を用いたコバルト(III)錯体の幾何異性と分光化学的性質

    三橋了爾,鈴木孝義,砂月幸成,小島正明

    日本化学会第92春季年会  2012 

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    Event date: 2012.3.25 - 2012.3.28

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:横浜  

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  • 三脚型六座配位子のCo(II)錯体を錯体配位子として用いた三核錯体の合成と性質

    藤野妙恵,小林玉実,鈴木孝義,砂月幸成,小島正明

    日本化学会第92春季年会  2012 

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    Event date: 2012.3.25 - 2012.3.28

    Language:Japanese   Presentation type:Poster presentation  

    Venue:横浜  

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  • アデニナト(1-)およびチミナト(1-)が配位したロジウム(III)錯体の合成と構造および水素結合相互作用

    池田美有,高山明日香,加島彩菜,鈴木孝義,砂月幸成,小島正明

    日本化学会第92春季年会  2012 

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    Event date: 2012.3.25 - 2012.3.28

    Language:Japanese   Presentation type:Poster presentation  

    Venue:横浜  

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  • ビス−イミダゾリルイミン配位子を含む鉄(II)錯体の結晶構造と磁気的性質

    内藤大士,砂月幸成,川本亮平,藤田邦洋,丸山久志,鈴木孝義,小島正明

    2011年日本化学会西日本大会  2011 

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    Event date: 2011.11.12 - 2011.11.13

    Language:Japanese   Presentation type:Poster presentation  

    Venue:徳島  

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  • 三脚型三座ホスフィン配位子を有する七配位d4金属錯体の合成と構造および性質

    菊間淳志,鈴木孝義,砂月幸成

    2011年日本化学会西日本大会  2011 

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    Event date: 2011.11.12 - 2011.11.13

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:徳島  

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  • 非対称三座アミン−アミダト配位子を用いたコバルト(III)錯体の幾何選択性と水素結合相互作用

    三橋了爾,鈴木孝義,砂月幸成,小島正明

    2011年日本化学会西日本大会  2011 

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    Event date: 2011.11.12 - 2011.11.13

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:徳島  

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  • アミダトおよびチオエーテル供与基を持つ直鎖型六座配位子のコバルト(II)および(III)錯体の性質

    砂月幸成,山根優希,鈴木孝義,小島正明

    2011年日本化学会西日本大会  2011 

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    Event date: 2011.11.12 - 2011.11.13

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:徳島  

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  • Gate現象を発現する銅錯体の非水溶液中における酸化還元挙動に関する速度論的研究

    山田篤利,間部拓哉,鈴木孝義,高木秀夫

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

    Language:Japanese   Presentation type:Poster presentation  

    Venue:岡山  

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  • イミダゾール基を含むシッフ塩基配位子を用いた新規単核および多核錯体の合成と性質

    永瀬貴教,鈴木孝義,砂月幸成,小島正明

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • テトラゾラト基を含むシッフ塩基型多座配位子を有する金属錯体の合成

    金山晶彦,砂月幸成,鈴木孝義

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • Properties of iminodiacetate dithiocarbamates Co(III), Ni(II), and Cu(II) complexes with 6-, 4-, and 4-Charges, respectively

    Keo Vanthoeun, Toh Bun Ho, Masakazu Kita, Takayoshi Suzuki

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • 遷移金属(II)イオンとランタニド(III)イオンを含む三核錯体の完全自然分晶

    和田公輝,鈴木孝義,砂月幸成,小島正明

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • 8-(ジフェニルホスファニル)キノリンを含むロジウム(III)及びルテニウム(II)錯体の合成と性質

    中村豪,青木理恵,加藤昌子,高木秀夫,砂月幸成,鈴木孝義

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • イミダゾール基と2-ピリジルヒドラゾン部位を持つ非対称三座配位子を含むコバルト(II)錯体の合成と性質

    秋山紗恵子,小島正明,砂月幸成,中島清彦,鈴木孝義

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:岡山  

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  • ホスフィン−テトラゾラト型配位子が架橋した異種金属二核錯体の合成と性質

    竹原佑太郎,木原恵子,鈴木孝義,砂月幸成,喜多雅一

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • Unusual Redox Properties of Ruthenium(II/III) Complexes with Bidentate 1,4,5,6-Tetrahydropyrimidyl-2-phenol Ligand

    Ryoji Mitsuhashi, Takayoshi Suzuki, Yukinari Sunatsuki, Masaaki Kojima

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • Trends in redox potentials of PdX2(P-P) complexes: (X=Cl−, Br−, I−); P-P=bis(diphenylphosphino)alkanes

    Abukari Moses, Masakazu Kita, Takayoshi Suzuki, and Yoshimi Sueishi

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • Ru錯体結晶の発光寿命に対する結晶溶媒同位体効果の研究

    天明和浩,鈴木孝義,篠崎一英

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • イミダゾラト架橋による14核かご型錯体の合成と性質

    横井梓,砂月幸成,鈴木孝義,冬広明,小島正明

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • 特異な構造および電子状態の安定化を可能にする三脚型三座ホスフィン配位子を有するd4金属錯体の合成と性質

    菊間淳志,鈴木孝義,砂月幸成

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • N,N-(2,2’-dipicolyl)dithiocarbamateを含むコバルト(III)錯体の合成

    山崎華佳,喜多雅一,鈴木孝義

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • 核酸塩基thymineを構成ユニットとするCp*RhIII四核錯体の合成と構造

    加島彩菜,砂月幸成,鈴木孝義,冬広明

    錯体化学会第61回討論会  2011 

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    Event date: 2011.9.17 - 2011.9.19

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    Venue:岡山  

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  • イミダゾール基を有する配位子による新規かご形錯体の合成と性質

    横井梓,砂月幸成,鈴木孝義,冬広明,小島正明

    日本化学会第91春季年会  2011 

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    Event date: 2011.3.26 - 2011.3.29

    Language:Japanese   Presentation type:Poster presentation  

    Venue:横浜  

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  • 8-(ジフェニルホスファニル)キノリンを含む遷移金属錯体の特異な立体構造の安定化

    中村豪,鈴木孝義,砂月幸成,高木秀夫

    日本化学会第91春季年会  2011 

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    Event date: 2011.3.26 - 2011.3.29

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:横浜  

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  • Synthesis of 14-nuclear coordination cage compounds using imidazole-derived ligands International conference

    A. Yokoi, N. Harada, Y. Sunatsuki, T. Suzuki, and M. Kojima

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010)  2010 

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    Event date: 2010.12.15 - 2010.12.20

    Language:English   Presentation type:Poster presentation  

    Venue:Honolulu, HI, U.S.A.  

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  • Cobalt complexes with a linear chain type hexadentate ligand containing amidate and thioether groups International conference

    Y. Yamane, Y. Sunatsuki, T. Suzuki, and M. Kojima

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010)  2010 

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    Event date: 2010.12.15 - 2010.12.20

    Language:English   Presentation type:Poster presentation  

    Venue:Honolulu, HI, U.S.A.  

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  • Geometrical isomers of cobalt(III) complexes with unsymmetrical tridentate (hydroxybenzamido)alkylamines International conference

    R. Mitsuhashi, Y. Sunatsuki, T. Suzuki, and M. Kojima

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010)  2010 

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    Event date: 2010.12.15 - 2010.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Synthesis and reaction of ruthenium(II) azido complexes bearing 2-pyridinethiolate International conference

    G. Nakamura, T. Suzuki, Y. Sunatsuki, and M. Kojima

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010)  2010 

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    Event date: 2010.12.15 - 2010.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Reactivity between metal complexes bearing imidazole group and tetraphenylborate ion International conference

    T. Nagase, Y. Sunatsuki, T. Suzuki, and M. Kojima

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010)  2010 

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    Event date: 2010.12.15 - 2010.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Orange and yellow crystals copper(II) complexes bearing 8-diphenylphosphinoquinoline: A pair of disortion isomers of intrinsically tetrahedral complex International conference

    T. Suzuki, H. Yamaguchi, A. Hashimoto, K. Nozaki, N. Ikeda, S. Kawata, M. Kojima, and H. D. Takagi

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010)  2010 

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    Event date: 2010.12.15 - 2010.12.20

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Honolulu, HI, U.S.A.  

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  • Structures and magnetic property of seven-coordinate molybdenum(II) complexes containing 1,1,1-tris(dimethylphosphinomethyl)ethane International conference

    A. Kikuma, T. Suzuki, Y. Sunatsuki, and M. Kojima

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010)  2010 

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    Event date: 2010.12.15 - 2010.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Crystal structures and isomerization reactions of dinuclear Ir(III)?Rh(III) complexes bridged by 5-methyltetrazolate International conference

    A. Takayama, T. Suzuki, Y. Sunatsuki, and M. Kojima

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010) 

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    Event date: 2010.12.15 - 2010.12.20

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    Venue:Honolulu, HI, U.S.A.  

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  • Syntheses and properties of mononuclear manganese(II), -(III), and ?(IV) complexes with a tripodal ligand International conference

    Y. Sunatsuki, Y. Kishima, T. Kobayashi, T. Yamaguchi, T. Suzuki, and M. Kojima

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010) 

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    Event date: 2010.12.15 - 2010.12.20

    Language:English   Presentation type:Poster presentation  

    Venue:Honolulu, HI, U.S.A.  

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  • Reactivities of iridium(III) NSC(NR2)S2? complexes generated by photolysis of azido-dithiocarbamato complexes International conference

    K. Ariyoshi, T. Suzuki, and M. Kojima

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010) 

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    Event date: 2010.12.15 - 2010.12.20

    Language:English   Presentation type:Poster presentation  

    Venue:Honolulu, HI, U.S.A.  

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  • Geometrical isomers of cobalt(III) complexes with unsymmetrical tridentate n-(alkylamino)salicylamidate ligands International conference

    R. Mitsuhashi, T. Suzuki, Y. Sunatsuki, and M. Kojima

    XVIIth International Winter School on Coordination Chemistry  2010 

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    Event date: 2010.12.6 - 2010.12.10

    Language:English   Presentation type:Poster presentation  

    Venue:Karpacz, Poland  

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  • 8-(ジフェニルホスフィノ)キノリンを含む遷移金属錯体の特異な構造

    鈴木孝義

    2010年日本化学会西日本大会  2010 

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    Event date: 2010.11.6 - 2010.11.7

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:熊本  

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  • イミダゾラト架橋による新規かご型錯体の合成

    横井梓,砂月幸成,鈴木孝義,冬広明,小島正明

    2010年日本化学会西日本大会  2010 

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    Event date: 2010.11.6 - 2010.11.7

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:熊本  

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  • 特異な構造および電子状態の安定化を可能にする三脚状三座ホスフィン配位子を有するMo, W錯体の合成と性質

    菊間淳志,鈴木孝義,砂月幸成

    第60回錯体化学討論会  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:大阪  

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  • Stabilization of three different oxidation states of manganese by using a sole tripodal hexadentate Schiff base ligand International conference

    Y. Sunatsuki, Y. Kishima, T. Suzuki, M. Kojima, J. Krzystek, and M. R. Sundberg

    60th Anniversary Conference on Coordination Chemistry in OSAKA  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:大阪  

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  • Novel Structural Modification of 8-(Diphenylphosphino)quinoline Complexes International conference

    T. Suzuki and H. D. Takagi

    60th Anniversary Conference on Coordination Chemistry in OSAKA  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:大阪  

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  • Geometrical Isomers of Cobalt Complexes with Unsymmetrical Tridentate (Hydroxybenzamido)alkylamines International conference

    R. Mitsuhashi, T. Suzuki, Y. Sunatsuki, and M. Kojima

    60th Anniversary Conference on Coordination Chemistry in OSAKA  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:English   Presentation type:Poster presentation  

    Venue:大阪  

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  • イミダゾール基を含む非対称な四座シッフ塩基配位子を用いた遷移金属錯体の合成、構造および反応

    永瀬貴教,鈴木孝義,砂月幸成,小島正明

    第60回錯体化学討論会  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:大阪  

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  • 8-(ジフェニルホスフィノ)キノリンおよびその類縁配位子を含む遷移金属錯体の合成と立体構造

    中村豪,鈴木孝義,砂月幸成,高木秀夫

    第60回錯体化学討論会  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:大阪  

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  • イミダゾール基を含む配位子による新規かご型錯体の合成

    横井梓,砂月幸成,鈴木孝義,冬広明,小島正明

    第60回錯体化学討論会  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:大阪  

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  • ビスイミダゾリルイミン配位子を含む鉄(II)錯体の構造とスピンクロスオーバー挙動

    内藤大士,砂月幸成,川本亮平,藤田邦洋,丸山久志,鈴木孝義,小島正明

    第60回錯体化学討論会  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:大阪  

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  • テトラゾラト誘導体を架橋配位子に用いた異種金属二核錯体の合成と性質

    竹原佑太郎,木原恵子,鈴木孝義,砂月幸成,小島正明

    第60回錯体化学討論会  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:Japanese   Presentation type:Poster presentation  

    Venue:大阪  

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  • アミダト供与基を含む直鎖型六座配位子のコバルト錯体に関する反応性と電子状態

    山根優希,砂月幸成,鈴木孝義,小島正明

    第60回錯体化学討論会  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪  

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  • 三座配位子を有するPt(II)錯体へのトリフルオロメチル基の導入と発光特性

    西内勇太,篠崎一英,鈴木孝義

    第60回錯体化学討論会  2010 

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    Event date: 2010.9.27 - 2010.9.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪  

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  • 5-メチルテトラゾラト架橋Ir?Rh二核錯体の結晶および溶存構造に与える共存配位子の影響

    高山明日香,鈴木孝義,砂月幸成,小島正明

    第60回錯体化学討論会 

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    Event date: 2010.9.27 - 2010.9.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪  

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  • Reactivities of Iridium(III) NSC(NR2)S2? Complexes Generated by Photolysis of Azido-dithiocarbamato Complexes

    有吉慧太,鈴木孝義

    第57回有機金属化学討論会 

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    Event date: 2010.9.16 - 2010.9.18

    Language:Japanese   Presentation type:Poster presentation  

    Venue:八王子  

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  • Cobalt Complexes with a Strand Type Hexadentate Ligand Containing Thioether-amidate-pyridyl Donor Set International conference

    Y. Yamane, Y. Sunatsuki, T. Suzuki, and M. Kojima

    2nd Okayama University – Copenhagen University collaboration symposium  2010 

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    Event date: 2010.6.1 - 2010.6.2

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Copenhagen, Denmark  

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  • Geometrical Isomers of Cobalt(III) Complexes with Unsymmetrical Tridentate (Hydroxybenzamido)alkylamines International conference

    R. Mitsuhashi, Y. Sunatsuki, T. Suzuki, and M. Kojima

    2nd Okayama University – Copenhagen University collaboration symposium  2010 

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    Event date: 2010.6.1 - 2010.6.2

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Copenhagen, Denmark  

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  • Unusual Molecular Structures of 8-Diphenylphosphinoquinoline Complexes. Two Novel Examples of Palladium(II) and Copper(I) with Crystal Color Changes International conference

    T. Suzuki

    2nd Okayama University – Copenhagen University collaboration symposium  2010 

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    Event date: 2010.6.1 - 2010.6.2

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Copenhagen, Denmark  

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  • Chiral Recognition using Hydrogen Bonding Framework of Metal Complexes with Tripodal Ligand Containing Imidazole Groups International conference

    Y. Sunatsuki, S. Miyahara, Y. Sasaki, T. Suzuki, M. Kojima, and N. Matsumoto

    2nd Okayama University – Copenhagen University collaboration symposium  2010 

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    Event date: 2010.6.1 - 2010.6.2

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Copenhagen, Denmark  

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  • Reactivities of Iridium(III) Complexes Containing N-atom-inserted Ligands, NSC(NR2)S2? and SN=C(NR2)S2? International conference

    K. Ariyoshi, T. Suzuki, and M. Kojima

    2nd Okayama University ? Copenhagen University collaboration symposium 

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    Event date: 2010.6.1 - 2010.6.2

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Copenhagen, Denmark  

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  • Crystal Structures and Isomerization Reactions of Dinuclear Ir?Rh Complexes Bridged by 5-Methyltetrazolate International conference

    A. Takayama, T. Suzuki, Y. Sunatsuki, and M. Kojima

    2nd Okayama University ? Copenhagen University collaboration symposium 

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    Event date: 2010.6.1 - 2010.6.2

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Copenhagen, Denmark  

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  • 三脚型配位子を用いた単核マンガン(II), (III), (IV)錯体の合成と性質

    喜島由香菜,小林玉実,山口友佳,砂月幸成,鈴木孝義,門田功,小島正明

    第59回錯体化学討論会  2009 

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    Event date: 2009.9.25 - 2009.9.27

    Presentation type:Oral presentation (general)  

    Venue:長崎  

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  • 5-メチルテトラゾラトが架橋した異種金属二核錯体の特異な異性化反応メカニズム

    高山明日香,鈴木孝義,小島正明

    第59回錯体化学討論会  2009 

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    Event date: 2009.9.25 - 2009.9.27

    Presentation type:Poster presentation  

    Venue:長崎  

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  • 非対称型三座アミドまたはシッフ塩基配位子を用いた金属錯体の合成とその構造および性質

    三橋了爾,秦泉寺真琴,砂月幸成,鈴木孝義,小島正明

    第59回錯体化学討論会  2009 

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    Event date: 2009.9.25 - 2009.9.27

    Presentation type:Poster presentation  

    Venue:長崎  

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  • アミド基を有する直鎖型六座配位子を用いたコバルト(II/III)錯体の合成と性質

    山根優希,砂月幸成,鈴木孝義,小島正明

    第59回錯体化学討論会  2009 

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    Event date: 2009.9.25 - 2009.9.27

    Presentation type:Poster presentation  

    Venue:長崎  

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  • Nitronyl Nitroxide Radicalを用いたMnIIIシッフ塩基錯体の合成と構造及び磁気的性質

    佐々木由布,貴志貫,砂月幸成,鈴木孝義,小島正明

    第59回錯体化学討論会  2009 

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    Event date: 2009.9.25 - 2009.9.27

    Presentation type:Poster presentation  

    Venue:長崎  

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  • イミノ二酢酸ジチオカルバマト誘導体を含むCo(III)金属錯体の合成と性質

    トウ文豊,喜多雅一,鈴木孝義,小島正明

    第59回錯体化学討論会  2009 

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    Event date: 2009.9.25 - 2009.9.27

    Presentation type:Poster presentation  

    Venue:長崎  

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  • Donor number determination of ionic liquid with [Cu(S-prodtc)2]2? (S-prodtc = S-prolidyl dithiocarbamate)

    P. Samphea, T. Suzuki, M. Kojima, M. Kita

    第59回錯体化学討論会 

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    Event date: 2009.9.25 - 2009.9.27

    Presentation type:Poster presentation  

    Venue:長崎  

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  • Novel counter anion effects (CAEs) of added [Co(NH3)6]X3 (X? = Cl?, Br?, I? or ClO4?) on surface tension reduction (STR) of aqueous solutions of anionic surfactants

    S. Sovanna, T. Suzuki, M. Kojima, S. Tachiyashiki, M. Kita

    第59回錯体化学討論会 

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    Event date: 2009.9.25 - 2009.9.27

    Presentation type:Oral presentation (general)  

    Venue:長崎  

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  • ジチオカルバマトおよびアジドを含む錯体に光照射により生成したイリジウム(III) NSC(NR2)S2? 錯体の反応性

    有吉慧太,鈴木孝義,小島正明

    第59回錯体化学討論会 

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    Event date: 2009.9.25 - 2009.9.27

    Presentation type:Oral presentation (general)  

    Venue:長崎  

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  • 2?シアノエチルホスフィン類を含むCo(III)錯体の構造、性質および反応:テトラゾラト/ホスフィン型キレート錯体の生成

    木原恵子,鈴木孝義,喜多雅一,砂月幸成,小島正明

    第59回錯体化学討論会 

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    Event date: 2009.9.25 - 2009.9.27

    Presentation type:Oral presentation (general)  

    Venue:長崎  

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  • REACTIVITIES OF NITROGEN ATOM-INSERTED PRODUCTS GENERATED BY PHOTOLYSIS OF IRIDIUM(III) AZIDO-DITHIOCARBAMATO COMPLEXES International conference

    Keita Ariyoshi, *Takayoshi Suzuki, Masaaki Kojima

    18th International Symposium on the Photochemistry and Photophysics of Coordination Compounds  2009 

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    Event date: 2009.7.4 - 2009.7.9

    Presentation type:Poster presentation  

    Venue:Sapporo, Japan  

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  • NITROGEN ATOM INSERTION INITIATED BY PHOTOLYSIS OF IRIDIUM(III) AZIDO COMPLEXES International conference

    *Takayoshi Suzuki, Mai Kotera, Yusuke Sekioka, Keita Ariyoshi, Masaaki Kojima

    18th International Symposium on the Photochemistry and Photophysics of Coordination Compounds  2009 

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    Event date: 2009.7.4 - 2009.7.9

    Presentation type:Poster presentation  

    Venue:Sapporo, Japan  

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  • 8-(ジフェニルホスフィノ)キノリンを含むイリジウム(III)ヒドリド錯体の生成

    有吉慧太・小寺麻衣・鈴木孝義・小島正明

    日本化学会第89春季年会  2009 

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    Event date: 2009.3.27 - 2009.3.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:船橋  

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  • 3-(4-imidazoylmethylideneamino-1-propanolの金属錯体の合成と性質

    原田奈保子・砂月幸成・鈴木孝義・小島正明

    日本化学会第89春季年会  2009 

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    Event date: 2009.3.27 - 2009.3.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:船橋  

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  • 5-メチルテトラゾラト架橋Ir?Rh二核錯体の結晶構造及び異性化反応

    高山明日香・鈴木孝義・砂月幸成・小島正明

    日本化学会第90春季年会 

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    Event date: 2009.3.26 - 2009.3.29

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東大阪  

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  • Nitrogen-Insertion and -Transfer Reaction using Cp*Ir Fragment International conference

    Takayoshi Suzuki

    Symposium in Commemoration of International Exchange Agreement between Faculty of Science, University of Copenhagen, Denmark and Graduate School of Natural Science and Technology, Okayama University  2009 

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    Event date: 2009.3.23

    Presentation type:Oral presentation (general)  

    Venue:岡山  

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  • (ペンタメチルシクロペンタジエニル)イリジウム(III)フラグメントを有するh^5^-メチルテトラゾラト錯体の構造多様性

    鈴木孝義

    2008年日本化学会西日本大会  2008 

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    Event date: 2008.11.15 - 2008.11.16

    Presentation type:Oral presentation (general)  

    Venue:長崎  

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  • Surface Tension of Aqueous solution of Cobalt Complexes with Surfactants

    Sieng Sovanna, *Takayoshi Suzuki, Masaaki Kojima, Masakazu Kita

    第58回錯体化学討論会  2008 

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    Event date: 2008.9.20 - 2008.9.22

    Presentation type:Poster presentation  

    Venue:金沢  

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  • 2-シアノエチル基を有する単座ホスフィンを含むCo(III)錯体の構造と性質

    木原恵子、*鈴木孝義、喜多雅一、小島正明

    第58回錯体化学討論会  2008 

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    Event date: 2008.9.20 - 2008.9.22

    Presentation type:Poster presentation  

    Venue:金沢  

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  • メチル置換イミダゾール基を含む三脚型配位子を用いた鉄(III)錯体の合成と性質

    佐々木由布、砂月幸成、*鈴木孝義、小島正明

    第58回錯体化学討論会  2008 

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    Event date: 2008.9.20 - 2008.9.22

    Presentation type:Poster presentation  

    Venue:金沢  

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  • アミド基を有する新規三脚型六座配位子を用いた三価金属錯体の合成と性質

    辻野みさき、砂月幸成、*鈴木孝義、小島正明

    第58回錯体化学討論会  2008 

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    Event date: 2008.9.20 - 2008.9.22

    Presentation type:Poster presentation  

    Venue:金沢  

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  • アミド窒素を配位原子とするN2O2型平面四座配位子を用いたCo(III)、Rh(III)錯体の合成と性質

    秦泉寺真琴、砂月幸成、*鈴木孝義、小島正明

    第58回錯体化学討論会  2008 

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    Event date: 2008.9.20 - 2008.9.22

    Presentation type:Poster presentation  

    Venue:金沢  

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  • 8-ジフェニルホスフィノキノリンを含むCp*Ir^III^ (Cp* = h5-C5Me5) ヒドリド錯体の生成

    有吉慧太、小寺麻衣、*鈴木孝義、小島正明

    第58回錯体化学討論会  2008 

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    Event date: 2008.9.20 - 2008.9.22

    Presentation type:Poster presentation  

    Venue:金沢  

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  • 四座シッフ塩基配位子のマンガン(III)錯体にニトロニルニトロキシドラジカルが配位した新奇マンガン(III)錯体の構造と性質

    貴志貫、砂月幸成、*鈴木孝義、小島正明

    第58回錯体化学討論会  2008 

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    Event date: 2008.9.20 - 2008.9.22

    Presentation type:Oral presentation (general)  

    Venue:金沢  

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  • 三脚型配位子を用いたマンガン(II), (III), (IV)錯体の合成と性質

    喜島由香菜、小林玉実、山口友佳、砂月幸成、*鈴木孝義、小島正明

    第58回錯体化学討論会  2008 

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    Event date: 2008.9.20 - 2008.9.22

    Presentation type:Oral presentation (general)  

    Venue:金沢  

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  • 非対称三座配位子を用いた鉄(II)錯体の合成と性質

    丸山久志、川本亮平、藤田邦洋、砂月幸成、*鈴木孝義、小島正明

    第58回錯体化学討論会  2008 

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    Event date: 2008.9.20 - 2008.9.22

    Presentation type:Oral presentation (general)  

    Venue:金沢  

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  • 種々の二座キレート配位子を含むCp*Ir^III^(N3) 錯体 (Cp* = h^5^-C5Me5) の結晶構造

    高山明日香、小寺麻衣、*鈴木孝義、小島正明

    第58回錯体化学討論会  2008 

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    Event date: 2008.9.20 - 2008.9.22

    Presentation type:Poster presentation  

    Venue:金沢  

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  • イリジウム(III)?アジド錯体の光反応:窒素原子トランスファー反応と5?メチルテトラゾラト錯体の生成

    鈴木孝義

    岡山大学理学部化学科 有機化学と無機化学の交流シンポジウム ー構造(ミクロ)から機能(マクロ)までー 

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    Event date: 2008.7.29

    Presentation type:Oral presentation (general)  

    Venue:岡山  

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  • STRUCTURAL VERSATILITY OF 5-METHYLTETRAZOLATO COMPLEXES OF (PENTAMETHYLCYCLOPENTADIENYL)IRIDIUM(III) INCORPORATING 2,2'-BIPYRIDINE, N,N-DIMETHYLDITHIOCARBAMATE, OR 2-PYRIDINETHIOLATE LIGANDS International conference

    Mai Kotera, Yusuke Sekioka, *Takayoshi Suzuki

    38th International Conference on Coordination Chemistry  2008 

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    Event date: 2008.7.20 - 2008.7.24

    Presentation type:Poster presentation  

    Venue:Jerusalem, Israel  

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  • 5-メチルテトラゾラト錯体の配位/架橋様式の多様性

    鈴木孝義

    関西学院大学錯体分子素子研究センター「無機有機複合材料創出のための錯体分子素子の研究」2008年シンポジウム  2008 

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    Event date: 2008.4.19

    Presentation type:Oral presentation (general)  

    Venue:三田  

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  • ピラゾラト架橋多核錯体の合成と性質

    西尾恭之介・海崎純男・*鈴木孝義・冬広明・川田知

    第57回錯体化学討論会  2007 

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    Event date: 2007.9.25 - 2007.9.27

    Presentation type:Oral presentation (general)  

    Venue:名古屋  

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  • ビス(8-ジフェニルホスフィノキノリン)銅(I) 錯体の四面体構造からのひずみに由来する幾何異性体対の単離と物性

    *鈴木孝義・山口浩史・橋本彰・野崎浩一・川田知・池田憲昭・高木秀夫

    第57回錯体化学討論会  2007 

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    Event date: 2007.9.25 - 2007.9.27

    Presentation type:Oral presentation (general)  

    Venue:名古屋  

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  • 2-ピリジンチオラトおよび8-キノリンチオラトが架橋配位した (ペンタメチルシクロペンタジエニル)イリジウム(III) 二核錯体の構造と5-メチルテトラゾールとの反応

    *鈴木孝義・小寺麻衣

    第57回錯体化学討論会  2007 

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    Event date: 2007.9.25 - 2007.9.27

    Presentation type:Poster presentation  

    Venue:名古屋  

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  • 6配位/4配位構造の[Cu(pdt)2]2+/+錯体対の合成、構造および電子移動反応

    三摩絹子・野田恭子・佐々木恵美菜・丸井新太・山根遼平・*鈴木孝義・高木秀夫

    第57回錯体化学討論会  2007 

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    Event date: 2007.9.25 - 2007.9.27

    Presentation type:Poster presentation  

    Venue:名古屋  

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  • MnII2O4+クラスターを内包する同種五核ヘリケイト錯体の合成と性質

    石川立太・西尾恭之介・海崎純男・冬広明・*鈴木孝義・中野元裕・野崎浩一・川田知

    第57回錯体化学討論会  2007 

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    Event date: 2007.9.25 - 2007.9.27

    Presentation type:Oral presentation (general)  

    Venue:名古屋  

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  • [Cu(Ph2Pqn)2]BF4 (Ph2Pqn = 8 - ジフェニルホスフィノキノリン) の新しい構造異性体

    *鈴木孝義、山口浩史、橋本彰、野崎浩一、川田知、池田憲昭、高木秀夫

    第20回配位化合物の光化学討論会  2007 

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    Event date: 2007.8.7 - 2007.8.9

    Presentation type:Oral presentation (general)  

    Venue:神戸  

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  • イリジウム(III) ? アジド錯体の光反応をトリガーとする窒素原子転移反応

    *鈴木孝義、関岡裕佑、海崎純男、James M. Mayer

    第18回配位化合物の光化学討論会 

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    Event date: 2007.8.3 - 2007.8.5

    Venue:松島町(宮城県)  

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  • NITROGEN?ATOM INSERTION INTO Ir?S OR Ir?N BONDS INITIATED BY PHOTOLYSIS OF IRIDIUM(III) AZIDO COMPLEXES BEARING DITHIOCARBAMATES, 2-PYRIDINETHIOLATE OR THE RELATED THIOLATES International conference

    *Takayoshi Suzuki, Yusuke Sekioka, Mai Kotera

    1st Asian Conference on Coordination Chemistry 

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    Event date: 2007.7.29 - 2007.8.2

    Presentation type:Poster presentation  

    Venue:Okazaki, Japan  

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  • ベンズイミダゾール-2-チオラトが架橋配位した二核イリジウム(III)錯体の構造とプロトン付加/脱プロトン反応

    小寺麻衣・*鈴木孝義・海崎純男

    日本化学会第87春季年会  2007 

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    Event date: 2007.3.25 - 2007.3.28

    Presentation type:Oral presentation (general)  

    Venue:吹田  

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  • 多様な配位様式を示す5-メチルテトラゾレートを含む単核および二核イリジウム(III)錯体

    小寺麻衣・*鈴木孝義・海崎純男

    日本化学会第87春季年会  2007 

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    Event date: 2007.3.25 - 2007.3.28

    Presentation type:Oral presentation (general)  

    Venue:吹田  

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  • イリジウム(III)?アジド錯体の光反応と窒素原子トランスファー

    *鈴木孝義

    錯体化学若手の会 近畿支部勉強会 

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    Event date: 2006.12.6

    Venue:豊中  

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  • P-N, P-P型配位子を用いたNi低酸化状態の安定化に関する研究

    井上聡也・佐々木恵美菜・橋本彰・山下良生・*鈴木孝義・柏原和夫・高木秀夫

    第56回錯体化学討論会  2006 

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    Event date: 2006.9.16 - 2006.9.18

    Venue:広島  

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  • 新規P2N1三座配位子が配位したFe(II)錯体の合成とその構造、およびリン供与配位子ー金属間の結合に関する研究

    山口浩史・藤木雅之・橋本彰・野田恭子・柏原和夫・*鈴木孝義・高木秀夫

    第56回錯体化学討論会  2006 

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    Event date: 2006.9.16 - 2006.9.18

    Venue:広島  

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  • イリジウム(III)?アジド錯体の光反応性の共存配位子による制御:窒素原子挿入反応とニトリルの1,3-環化付加反応

    関岡裕佑・小寺麻衣・*鈴木孝義・海崎純男

    第56回錯体化学討論会 

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    Event date: 2006.9.16 - 2006.9.18

    Venue:広島  

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  • ジチオカルボナト配位子が配位したルテニウム?ホスフィン配位子の合成と構造および熱異性化反応

    野田恭子・大内祐子・*鈴木孝義・柏原和夫・高木秀夫

    第56回錯体化学討論会 

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    Event date: 2006.9.16 - 2006.9.18

    Venue:広島  

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  • 3-アミノプロピルジメチルホスフィン (pdmp) を含む混合配位子コバルト(III) 錯体の合成と分子構造:pdmpが形成するN?P型6員キレート環のコンフォメーション

    *鈴木孝義・藤原克宏・高木秀夫・柏原和夫

    第56回錯体化学討論会 

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    Event date: 2006.9.16 - 2006.9.18

    Venue:広島  

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  • イリジウム(III) ?アジド錯体の光反応に対する共存配位子の影響

    小寺麻衣、*鈴木孝義、海崎純男

    第19回配位化合物の光化学討論会 

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    Event date: 2006.8.4 - 2006.8.25

    Venue:つくば  

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  • Structure and Reactivity of Pyridine-1-imide-2-thiolate(2-) Complex of Iridium(III), Cp*Ir(1-N-2-Spy), Prepared via Nitrogen Atom Insertion into Ir?N(py) Bond by Photolysis of Cp*Ir(2-Spy)(N3)

    *Takayoshi Suzuki, Yusuke Sekioka, Sumio Kaizaki, James M. Mayer

    Pacifichem 2005 

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    Event date: 2005.12.15 - 2005.12.20

    Venue:Honolulu, USA  

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  • 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazineの配位したCu(II)錯体の構造および酸化還元反応

    野田恭子・*鈴木孝義・柏原和夫・高木秀夫

    第55回錯体化学討論会  2005 

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    Event date: 2005.9.21 - 2005.9.23

    Venue:新潟  

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  • 多様な配位様式を持つ1,8-ナフチリジンを含む一連のペンタメチルシクロペンタジエニルイリジウム(III)錯体の結晶構造と溶存状態

    *鈴木孝義

    第55回錯体化学討論会  2005 

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    Event date: 2005.9.21 - 2005.9.23

    Venue:新潟  

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  • 光学活性なβ-ジケトナト (+)-hfbc を含む錯体 Na[Ln((+)-hfbc)4]・CH3CN の溶存状態の構造と性質

    城谷大・*鈴木孝義・海崎純男

    第55回錯体化学討論会  2005 

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    Event date: 2005.9.21 - 2005.9.23

    Venue:新潟  

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  • [Cp*Ir(2-Spy)(N3)] の光反応により Ir-N 結合間に窒素原子が挿入した [Cp*Ir(1-N-2-Spy)] の構造と反応

    関岡裕佑・*鈴木孝義・海崎純男

    第55回錯体化学討論会  2005 

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    Event date: 2005.9.21 - 2005.9.23

    Venue:新潟  

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  • P-Nハイブリット配位子を含む金属錯体の合成、構造および酸化還元挙動

    橋本彰・藤木雅之・*鈴木孝義・柏原和夫・高木秀夫

    第55回錯体化学討論会  2005 

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    Event date: 2005.9.21 - 2005.9.23

    Venue:新潟  

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  • 金属イオンをテンプレートとしたチミナト(2‒)架橋ロジウム(III)環状四核錯体の合成

    2016年日本化学会中国四国支部大会  2016 

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  • Structures and Magnetic Properties of Four-coordinate Cobalt(II) Complexes with N–O– type Bidentate Ligands

    The 23rd International SPACC Symposium  2016 

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  • Thyminate(2–)-bridged cyclic tetranuclear rhodium(III) complexes formed by a template of a sodium, calcium or lanthanoid ion

    2015 International Chemical Congress of Pacific Basin Societies (Pacifichem2015)  2015 

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  • Flipping of Coordinated Triazine Moiety in Cu(II)–L2 and Small Electronic Factor, κel, for Direct Outer-Sphere Cross Reactions (L = 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine)

    錯体化学会第65回討論会  2015 

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  • カルシウムイオンをテンプレートとしたチミナト(2‒)架橋ロジウム(Ⅲ)環状四核錯体の構造

    2015年日本化学会中国四国支部大会  2015 

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  • 非配位N–H結合を有する新規鉄(III)錯体の合成と水素結合相互作用

    2015年日本化学会中国四国支部大会  2015 

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  • Thyminate(2–)を架橋配位子に用いたCp*Rh環状四核錯体の構造と性質

    錯体化学会第64回討論会  2014 

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  • チミナト(2–)を架橋配位子に用いたロジウム(III)環状四核錯体の構造と性質

    2014年日本化学会中国四国支部大会  2014 

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  • Cp*Rh環状四核錯体に取り込まれた陽イオンによるthyminate(2–)の架橋構造変換

    錯体化学会第63回討論会  2013 

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  • Cyclic Tetranuclear Rhodium(III) Complexes Bridged by Thyminate(2–) and Incorporating an Alkali, Alkali Earth or Lanthanide Ion

    「新規分子磁性化合物の探索」2013年シンポジウム  2013 

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  • Thyminate(2–)を構成ユニットとするCp*Rh(III)四核錯体

    錯体化学会第62回討論会  2012 

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  • テトラゾラト誘導体を架橋配位子として用いたパラジウム(II)を含む異種金属二核錯体の立体構造制御

    錯体化学会第62回討論会  2012 

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  • イミダゾール基を含むシッフ塩基配位子を用いた新規単核および多核錯体の合成と性質

    2011年日本化学会西日本大会  2011 

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  • Syntheses and properties of mononuclear manganese(II), -(III), and –(IV) complexes with a tripodal ligand

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010)  2010 

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  • Reactivities of Iridium(III) Complexes Containing N-atom-inserted Ligands, NSC(NR2)S2– and SN=C(NR2)S2–

    2nd Okayama University – Copenhagen University collaboration symposium  2010 

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  • Reactivities of Iridium(III) NSC(NR2)S2– Complexes Generated by Photolysis of Azido-dithiocarbamato Complexes

    第57回有機金属化学討論会  2010 

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  • Crystal Structures and Isomerization Reactions of Dinuclear Ir–Rh Complexes Bridged by 5-Methyltetrazolate

    2nd Okayama University – Copenhagen University collaboration symposium  2010 

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  • 5-メチルテトラゾラト架橋Ir–Rh二核錯体の結晶および溶存構造に与える共存配位子の影響

    第60回錯体化学討論会  2010 

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  • Crystal structures and isomerization reactions of dinuclear Ir(III)–Rh(III) complexes bridged by 5-methyltetrazolate

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010)  2010 

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  • Reactivities of iridium(III) NSC(NR2)S2– complexes generated by photolysis of azido-dithiocarbamato complexes

    2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010)  2010 

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  • 5-メチルテトラゾラト架橋Ir–Rh二核錯体の結晶構造及び異性化反応

    日本化学会第90春季年会  2009 

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  • ジチオカルバマトおよびアジドを含む錯体に光照射により生成したイリジウム(III) NSC(NR2)S2– 錯体の反応性

    第59回錯体化学討論会  2009 

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  • Novel counter anion effects (CAEs) of added [Co(NH3)6]X3 (X– = Cl–, Br–, I– or ClO4–) on surface tension reduction (STR) of aqueous solutions of anionic surfactants

    第59回錯体化学討論会  2009 

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  • Donor number determination of ionic liquid with [Cu(S-prodtc)2]2– (S-prodtc = S-prolidyl dithiocarbamate)

    第59回錯体化学討論会  2009 

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  • 2–シアノエチルホスフィン類を含むCo(III)錯体の構造、性質および反応:テトラゾラト/ホスフィン型キレート錯体の生成

    第59回錯体化学討論会  2009 

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  • イリジウム(III)-アジド錯体の光反応:窒素原子トランスファー反応と5-メチルテトラゾラト錯体の生成

    岡山大学理学部化学科 有機化学と無機化学の交流シンポジウム ー構造(ミクロ)から機能(マクロ)までー  2008 

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  • イリジウム(III) - アジド錯体の光反応をトリガーとする窒素原子転移反応

    第18回配位化合物の光化学討論会  2007 

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  • NITROGEN-ATOM INSERTION INTO Ir-S OR Ir-N BONDS INITIATED BY PHOTOLYSIS OF IRIDIUM(III) AZIDO COMPLEXES BEARING DITHIOCARBAMATES, 2-PYRIDINETHIOLATE OR THE RELATED THIOLATES

    1st Asian Conference on Coordination Chemistry  2007 

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  • イリジウム(III)-アジド錯体の光反応と窒素原子トランスファー

    錯体化学若手の会 近畿支部勉強会  2006 

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  • イリジウム(III) -アジド錯体の光反応に対する共存配位子の影響

    第19回配位化合物の光化学討論会  2006 

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  • イリジウム(III)-アジド錯体の光反応性の共存配位子による制御:窒素原子挿入反応とニトリルの1,3-環化付加反応

    第56回錯体化学討論会  2006 

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  • 3-アミノプロピルジメチルホスフィン (pdmp) を含む混合配位子コバルト(III) 錯体の合成と分子構造:pdmpが形成するN-P型6員キレート環のコンフォメーション

    第56回錯体化学討論会  2006 

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  • ジチオカルボナト配位子が配位したルテニウム―ホスフィン配位子の合成と構造および熱異性化反応

    第56回錯体化学討論会  2006 

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  • Structure and Reactivity of Pyridine-1-imide-2-thiolate(2-) Complex of Iridium(III), Cp*Ir(1-N-2-Spy), Prepared via Nitrogen Atom Insertion into Ir-N(py) Bond by Photolysis of Cp*Ir(2-Spy)(N3)

    Pacifichem 2005  2005 

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