Language：English   Publishing type：Research paper (scientific journal)   Publisher：ROYAL SOC CHEMISTRY  

The thermally and photolytically induced disproportionation of 6,13-dihydropentacene derivatives into tetrahydropentacenes and pentacenes results in unique solid-state fluorescence. The fluorescence thereby depends on the molecular structure and the molecular arrangement in the solid state.

DOI： 10.1039/c9ra03297e

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

Physical modifications of single-walled carbon nanotubes (SWCNTs) with fullerodendrons, followed by complexation with RuCl3 leads to the formation of CNT-photocatalysts that exhibit high quantum yields (QY = 12.8%) for the production of H-2 from water, even under illumination with NIR light (lambda(irr) = 1005 nm) in the presence of sacrificial donor. A Z-scheme photocatalytic system, consisting of such a CNT-photocatalyst, BiVO4, and [Co(bpy)(3)](3+/2+) shows a production of H-2 (17 mu mol/h) and O-2 (5.5 mu mol/h) under illumination from a solar simulator (AM-1.5) with a solar-to-hydrogen (STH) efficiency of 0.089%.

DOI： 10.1246/cl.180999

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY-HINDAWI  

The thiol-substituted B-12-cluster mercaptoundecahydro-closo-dodecaborate Na-2[B12H11SH] (BSH) was successfully attached to a poly(amido)amine (PAMAM) dendrimer, which contains a bis(decyloxy)decane core. The physical modification of single-walled carbon nanotubes (SWCNTs) with dendrimer(SB12)(4) afforded a SWCNT/dendrimer(SB12)(4) nanohybrid that exhibited NIR-I-to-NIR-II fluorescence. Herein, we describe a promising strategy for in vivo imaging of boron clusters that may be widely applicable to boron neutron capture therapy.

DOI： 10.1002/hc.21467

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Publisher：Springer International Publishing  

DOI： 10.1007/978-3-319-92917-0_9

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Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17K14448/

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier Ltd  

A novel SnO2/graphene oxide (GO) nano-nano composite was prepared by a facile sol–gel process. X-Ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, and nitrogen adsorption–desorption isotherms measurements confirmed the formation of a SnO2/GO nano-nano composite. The photoreaction of this SnO2/GO nano-nano composite was studied via the photodegradation of rhodamine B (RhB). Interestingly, the degradation mode of RhB in oxygen-saturated solution is photocatalytic reaction, but the degradation mode in argon-saturated solution is not photocatalytic reaction.

DOI： 10.1016/j.matchemphys.2018.03.046

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Nature Publishing Group  

Multi-walled carbon nanotube (MWCNT)/dendrimer sheet scaffolds, i.e., dendrimers attached to the surface of MWCNT buckypaper, were fabricated, and a hydroxyapatite (HAp) coating prepared on dendrimer-modified buckypaper using an alternate soaking process (ASP) is described. The amount of the HAp that is retained on the surface of the MWCNT/dendrimer sheet scaffolds depends on the modification method
i.e., surface modification performed after the formation of the buckypaper is much more effective in producing MWCNT/HAp hybrid materials than surface modification prior to the formation of the buckypaper. Moreover, biomimetic crystallization of calcium phosphate on buckypaper in simulated body fluid (SBF) was carried out. TEM analysis of the resulting MWCNT/dendrimer sheet scaffolds revealed that the MWCNT backbone was covered with scaly crystals.

DOI： 10.1038/s41428-018-0056-4

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

Dye-encapsulated single-walled carbon nanotubes (SWCNTs) were employed for the construction of a coaxial three-component dye/SWCNT/C60 heterojunction. Despite the larger diameter (∼1.4 nm) of the SWCNTs relative to that set by Flavel's rule (0.95 nm), the photoinduced electron transfer from dye-encapsulated SWCNTs to C60 proceeded smoothly, resulting in the photosensitized evolution of H2 from H2O using a ferrocenyl-based photosensitizer, which was confirmed by the action spectra.

DOI： 10.1021/jacs.7b12845

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

To observe a clear-cut example of the formation of mobile carriers from excitons on semiconducting single-walled carbon nanotubes (s-SWCNTs) surrounded by a medium with a high dielectric constant, water-dispersible s-SWCNT nanocomposites were fabricated by physical modifications using poly(amidoamine) dendrimers that contain an aliphatic core. The evolution of H2 from water using these s-SWCNT/dendrimer nanocomposites as photosensitizers under irradiation with visible light demonstrated a photo-induced electron transfer from the s-SWCNTs to the co-catalysts.

DOI： 10.1039/c7cc07194a

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

DOI： 10.11605/j.pnrs.201701004

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Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15H03519/

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

(Terthiophene)(4)-poly(amidoamine)-C-60 pentad 8a and (terthiophene)(2)-poly(amidoamine)-C-60 triad 8b have been synthesized with the aim of developing novel precursors for photoinduced polymerization. The electrochemical oxidation of pentad 8a by repetitive cyclic voltammogram scans gave a polymeric 8a film on a FTO electrode, which showed electrochemical activity and photoelectric response. When a monomer film of 8 on FTO was irradiated with visible light, the photoinduced polymerization of the terthiophene moiety was observed. The photoanodic features of an electropolymerized film of 8a on a FTO (poly-8a(electro)/FTO) and 8a/FTO were investigated regarding photocurrent response to light irradiation. The photocurrent of a photopolymerized 8a film on a FTO (poly-8a(photo)/FTO) electrode formed by photoreaction of 8a/FTO, is approximately 6 times greater than that of the 8a/FTO electrode.

DOI： 10.1246/bcsj.20140283

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS  

The first stable stannanetriol and germanetriol bearing sterically congested aryl groups were synthesized by hydrolysis of the corresponding trichloro-stannane and -germane. The stannanetriol is monomeric in solution as well as in the crystalline state, as evidenced by X-ray diffraction analysis and CP-MAS NMR spectroscopy. The stannanetriol reacted with silicone grease to afford a cagelike compound having three Sn-O-Si-O-Sn linkages in the molecule. All the group 14 triols can be converted to the corresponding trihalo compounds in good yields.

DOI： 10.1139/cjc-2013-0496

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

An amide-bound [Fe4S4](3+). cluster, [Fe4S4{N-(SiMe3)(2)}(4)](-) (1), was found to serve as a convenient precursor for synthetic analogues of the oxidized form of high-potential iron sulfur proteins. Treatment of 1 with 4 equiv of bulky thiols led to replacement of the amide ligands with thiolates, giving rise to a series of [Fe4S4(SR)(4)](-) clusters (R = Dmp (2a), Tbt (2b), Eind (2c), Dxp (2d), Dpp (2e); Dmp = 2,6-di(mesityl)phenyl, Tbt = 2,4,6-tris[bis(trimethylsily)methyl]phenyl, Eind = 1,1,3,3,5,5,7,7-octaethyl-s-hydrindacen-4-yl, Dxp = 2,6-di(m-xylyl)phenyl, Dpp = 2,6-diphenylphenyl). These clusters were characterized by the mass spectrum, the EPR spectrum, and X-ray crystallography. The redox potentials of the [Fe4S4](3+/2+) couple, -0.82 V (2a), -0.86 V (2b), -0.84 V (2c), -0.74 V (2d), and -0.63 V (2e) vs Ag/Ag+ in THF, are significantly more negative than that of [Fe4S4(SPh)(4)](-/2-) (-0.21 V).

DOI： 10.1021/ic402890k

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：TAYLOR & FRANCIS INC  

Hydrogen gas, which can be used in fuel cells to generate electricity, is considered the ultimate clean energy source. Recently, it was reported that a photo-induced electron transfer system consisting of single-walled carbon nanotubes (SWCNTs) and fullerodendrons shows photo-catalytic activity with a very high quantum yield for splitting water under visible light irradiation. However, the mechanism of high efficiency hydrogen generation is not yet clearly understood. We report here the spectroscopic characterizations of the SWCNT-fullerodendron composites. The results indicate two important fundamental properties of the composite system. First, fullerodendrons preferentially interact with the semiconducting SWCNTs instead of with their metallic counterparts. Second, the photo-induced electron transfer process from the C-60 moiety of fullerodendrons to SWCNTs occurs more efficiently with an increasing tube diameter.

DOI： 10.1080/1536383X.2013.794340

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：TAYLOR & FRANCIS LTD  

Tetrathiafluvalene (TTF)-annulated symmetrical and unsymmetrical phthalocyanines (4), (5), and (6) were prepared from 3,6-dioctylphthalonitrile (1) with a TTF unit, 4,5-dioctyloxyphthalonitrile (2), and 3,6-dioctyloxyphthalonitrile (3). Tetra-TTF-annulated phthalocyanine (4) and iodine produced an electron transfer complex which showed a radical cationic character.

DOI： 10.1080/10426507.2012.729115

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：ROYAL SOC CHEMISTRY  

A simple sol-gel condensation of tin(IV) tert-butoxide led to the formation of meso/macroporous membranes. SEM observation clearly shows the cylindrical macropore array, of which mean pore diameter is controllable between 200 and 800 nm. The existence of slit-shaped mesopores (12 nm) was confirmed by a N-2 adsorption-desorption experiment.

DOI： 10.1039/c3ra43642j

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：ROYAL SOC CHEMISTRY  

Direct incorporation of a Pt(II) complex into the shell of SWCNT/fullerodendron coaxial nanohybrids produces a new coaxial nanowire, SWCNT/fullerodendron/Pt(II), that shows efficient photocatalytic activity for hydrogen evolution from water (Phi = 0.16 upon irradiation at 450 +/- 5 nm) without any aid of electron relay such as methyl viologen.

DOI： 10.1039/c3nj00790a

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

A new pentacene dendrimer was synthesized in 81% yield through the aromatization of a dihydropentacene derivative having benzyl ether dendrons at the C2, C3, C9, and C10 positions. The dendrimer is very soluble in various organic solvents such as toluene, benzene, chloroform, dichloromethane, acetone, and ethyl acetate. The half-life of the dendrimer reaches 22.4 min upon photoirradiation in air. Interestingly, regiospecific [4 + 2] cycloaddition reactions proceeded at the central ring of the pentacene.

DOI： 10.1246/cl.2012.1622

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：PERGAMON-ELSEVIER SCIENCE LTD  

alpha-Substituted unsymmetrical phthalocyanines fused with one through three TTF units were prepared from mixed 3,6-dioctyloxyphthalonitrile and 3,6-dioctylphthalonitrile bearing a TTF unit. The optical and electrochemical properties of the products were determined by UV-vis spectroscopy and cyclic voltammetry. Mono-TTF-annulated phthalocyanine and iodine produced the electron transfer complex which showed the radical cationic character.

DOI： 10.3987/COM-12-S(N)18

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BACKGROUND: Although general anesthesia is widely used in the surgical arena, the mechanisms by which general anesthetics act remain unclear. We previously described alterations in gene expression ratios in hepatic tissue taken from rats treated with anesthetics. Consequently, it is considered that anesthetics influence liver metabolism. Thus, the goal of this study was to use pattern recognition analysis of proton nuclear magnetic resonance spectra to visualize changes in liver metabolic phenotypes in response to widely used intravenous anesthetics (propofol and dexmedetomidine) and inhalational anesthetics (sevoflurane and isoflurane). METHODS: Rats were randomized into 13 groups (n = 6 in each group), and each group received one of following agents: propofol, dexmedetomidine, sevoflurane, isoflurane, or no anesthetic (control group). The liver was directly removed from rats immediately after or 24 h or 48 h after a 6-h period of anesthesia. Hydrophilic compounds were extracted from the liver and were analyzed with proton nuclear magnetic resonance spectroscopy. All spectral data were processed and analyzed by principal component analysis for comparison of metabolite profiles. RESULTS: Data were visualized by plotting principal component (PC) scores. In the plots, each point represents an individual sample. Each group was clustered separately on the plots, and the PC scores of the propofol group were clearly distinct from those of the control group and other anesthetic groups. The difference in PC scores was more pronounced immediately after completion of anesthesia when compared with 24 or 48 h after completion of anesthesia. Although the effect of intravenous anesthetics on the liver dissipated over time, the effect of inhalational anesthetics persisted. CONCLUSIONS: Propofol, dexmedetomidine, sevoflurane and isoflurane exert different effects on liver metabolism. In particular, liver metabolism was markedly altered after exposure to propofol. The effect of anesthesia on the liver under propofol or dexmedetomidine resolved rapidly when compared with the effect under sevoflurane or isoflurane.

DOI： 10.1186/1471-2342-12-28

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DOI： 10.1007/s10329-011-0285-z

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY-V C H VERLAG GMBH  

DOI： 10.1002/asia.201100711

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：PERGAMON-ELSEVIER SCIENCE LTD  

Unsymmetrical phthalocyanines with one or two TTF units were obtained by treating mixed 3,6-dioctyltetrathiafluvalenophthalonitrile and 4,5-dioctoxyphthalonitrile with Li in n-hexanol. Their optical and electrochemical properties were examined by UV-vis spectroscopy and cyclic voltammetry.

DOI： 10.3987/COM-11-S(P)42

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：NATL ACAD SCIENCES  

The all-ferric [Fe4S4](4+) cluster [Fe4S4{N(SiMe3)(2)}(4)] 1 and its one-electron reduced form [1](-) serve as convenient precursors for the synthesis of 3:1-site differentiated [Fe4S4] clusters and high-potential iron-sulfur protein (HiPIP) model clusters. The reaction of 1 with four equivalents (equiv) of the bulky thiol HSDmp (Dmp= 2,6-(mesityl)(2)C6H3, mesityl =2,4,6-Me3C6H2) followed by treatment with tetrahydrofuran (THF) resulted in the isolation of [Fe4S4(SDmp)(3)(THF)(3)] 2. Cluster 2 contains an octahedral iron atom with three THF ligands, and its Fe(S)(3)(O)(3) coordination environment is relevant to that in the active site of substrate-bound aconitase. An analogous reaction of [1](-) with four equiv of HSDmp gave [Fe4S4(SDmp)(4)](-) 3, which models the oxidized form of HiPIP. The THF ligands in 2 can be replaced by tetramethyl-imidazole (Me(4)Im) to give [Fe4S4(SDmp)(3)(Me(4)Im)] 4 modeling the [Fe4S4 (Cys)(3)(His)] cluster in hydrogenases, and its one-electron reduced form [4](-) was synthesized from the reaction of 3 with Me(4)Im. The reversible redox couple between 3 and [3](-) was observed at E-1/2=-820 mV vs. Ag/Ag+, and the corresponding reversible couple for 4 and [4](-) is positively shifted by +440 mV. The cyclic voltammogram of 3 also exhibited a reversible oxidation couple, which indicates generation of the all-ferric [Fe4S4](4+) cluster, [Fe4S4(SDmp)(4)].

DOI： 10.1073/pnas.1106472108

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Language：Japanese   Publisher：SOC SYNTHETIC ORGANIC CHEM JPN  

Dendrimers or dendrons having chromophore at the core or focal point were synthesized, and effects of dendritic substituent on photofunctionality were investigated. We found photoisomerization from allyl alcohol to ketone by the use of dendrimer disulfide as catalyst. Various photooxygenation reactions proceeded by the use of Cd10S16 molecular cluster dendrimer or fullerodendron as photosensitizer of singlet oxygen. Photoinduced charge separation of fullerodendrimers take place with high quantum efficiency in aqueous solution. In the presence of viologen dication and a sacrificial donor, the persistent viologen radical cation was generated. This electron pooling efficiency was obviously enhanced by the use of single-walled carbon nanotube/fullerodendron supramolecular system.

DOI： 10.5059/yukigoseikyokaishi.69.705

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：TAYLOR & FRANCIS LTD  

We succeeded in the synthesis of a novel poly(amidoamine) dendrimer having diphenyl diselenide at the core. Modification of the dendrimer diselenide by the reaction with glucono--lactone in methanol gave a water-soluble dendrimer diselenide having chiral terminal groups. The structures of dendrimers were satisfactorily confirmed by MAIDI-TOF MS spectrometry, elemental analysis, and NMR spectroscopy. Interestingly, induced circular dichroism (ICD) of the interaction between the diphenyl diselenide core and D-gluconamide periphery of the dendrimer was observed at 300 nm. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT[image omitted].

DOI： 10.1080/10426501003767102

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：PERGAMON-ELSEVIER SCIENCE LTD  

The Diels-Alder reaction between C(60) and anthryl glycodendron, which has D- or L-gluconamides at the terminals, gave a new fullerene glycodendron conjugate. Interestingly, the diastereoselective cycloaddition reaction proceeded upon the treatment of C60 with the anthryl dendron 3. Furthermore, optical pure fullerodendrons (-)-4L and (+)-4D, which were confirmed by (1)H and (13)C NMR spectroscopy, FT-IR, MALDI-TOF mass spectroscopic analysis, were isolated from the mixture of diastereomers. And their absolute configurations were predicted by the use of CD spectra. (C) 2010 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.tet.2010.07.061

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY-BLACKWELL PUBLISHING, INC  

The title compound, [Sn(2)(C(72)H(98))Te(2)(Te(3))], has a cage-like structure with bulky aryl substituents on the Sn atoms. The molecule sits over a crystallographic twofold axis, and hence the asymmetric unit consists of one half-molecule. Due to the twofold axis, the tritelluride part has a 1:1 disorder. One of the six-membered rings has a boat conformation, whereas the other has a chair conformation. The ditelluradistannane ring has a bent structure, with a dihedral angle of 32.89 (2)degrees between the two Te-Sn-Te planes.

DOI： 10.1107/S1600536810025729

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY-BLACKWELL  

The reaction of bis(2-bromo-2'-biphenyl)stannanes 1 with tert-butyllithium in the presence of diaryl- and dialkyldichlorostannanes leads to the extrusion of aryl and alkyl groups on the tin atom, affording 9-stannafluorene derivatives bearing biphenyl groups. The intermediates of the reactions were assigned to the corresponding pentaorganostannates, which were characterized by NMR spectroscopy. Unexpectedly, the dissociation of the aryl and alkyl groups from the tin atoms in intramolecular nucleophilic substitution reactions was preferable to that of chloride ions in intermolecular nucleophilic substitution reactions.

DOI： 10.1002/ejic.201000089

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

Arching a bay area of triphenyleno[1,12-bcd]thiophene with group 14 functionalities gave the first triphenylene derivatives whose two pairs of bay carbons are connected by two different heteroatom functionalities. Triphenyleno[1,12-bcd:4,5-b'c'd']dithiophene, which had been only accessible through the very severe reaction conditions, was synthesized under the mild reaction conditions. Photophysical properties of newly-obtained heterolotriphenylene derivatives are discussed with theoretical calculations. (C) 2009 Elsevier B. V. All rights reserved.

DOI： 10.1016/j.jorganchem.2009.11.039

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DOI： 10.1007/s10329-009-0180-z

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER ASSOC ADVANCEMENT SCIENCE  

Although the concept of aromaticity has long played an important role in carbon chemistry, it has been unclear how applicable the stabilizing framework is to the heaviest elements. Here we report the synthesis of dilithiotetraphenylplumbole by reduction of hexaphenylplumbole. X-ray crystallography revealed a planar structure with no alternation of carbon-carbon bond lengths in the five-membered ring core. Nuclear magnetic resonance spectra and relativistic theoretical calculations show considerable aromatic character in the molecule, thus extending aromaticity to carbon's heaviest congener.

DOI： 10.1126/science.1183648

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL-MDPI  

A new poly(amidoamine) dendron having 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) at the focal point was synthesized. Interestingly, formation of zwitterionic fullerodendrons (lambda(max) = 930 nm for C(60) and 795 nm for C(70)) were observed by Vis-NIR spectroscopy upon the reaction of C(60) or C(70) with the DBN-focal dendron. In particular, the C(70) anion was effectively stabilized by the site isolation effect of the dendritic wedge. The half-life of fullerodendron 12b having C(70) anion at the focal point reaches 7,345 min, which is 20 times longer than that of complex between C(60) and pristine DBN. Furthermore, in order to confirm the structure of the zwitterionic complex, fullerodendron 12a was reprecipitated from benzonitrile/1,2,4-trimethylbenzene, and was observed using IR spectroscopy and APPI-MS.

DOI： 10.3390/s100100613

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：PERGAMON-ELSEVIER SCIENCE LTD  

After the protection of two alpha-carbons of the dibenzothiophene moiety in triphenylenothiophene 1 by trimethylsilyl groups, the resulting compound 4 reacted with butyllithium followed by dichlorodimethylsilane to afford 10H-silolo[2',3',4',5':4,5]triphenyleno[1,12-bcd]thiophene 8, which reacted with butyllithium followed by dichlorodimethylsilane to afford novel heterasumanene 11. Using dichlorodimethylstannane instead of dichlorodimethylsilane afforded heterasumanene 12, which is the first example of a heterasumanene having three different heteroatom functionalities. (C) 2009 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.tetlet.2009.11.102

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：TAYLOR & FRANCIS LTD  

Reactions of 1,4-dilithio-1,2,3,4-tetraphenyl-1,3-butadiene with dichlorodiphenylplumbane gave hexaphenylplumbole 1 and spirobiplumbole 2. These structures were determined by X-ray diffraction analysis. Electronic structures of 1 and 2 were discussed by the aid of NMR analysis and theoretical calculations. The compounds 1 and 2 were found to be the first fluorescent organolead compounds.

DOI： 10.1080/10426501003773399

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

Novel dithienostannoles were synthesized by the reactions of the corresponding dilithiobithiophenes with dichlorodiphenylstannane. A unique byproduct, 10-membered ring compound was also obtained. Reduction of type A dithienostannole with lithium afforded 2,2'-dilithio-3,3'-bithiophene, while reduction of type B dithienostannole with lithium afforded the corresponding dithienostannole anion. The structure and aromaticity of the dithienostannole anion are also discussed. (C) 2009 Elsevier B. V. All rights reserved.

DOI： 10.1016/j.jorganchem.2009.08.026

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：PERGAMON-ELSEVIER SCIENCE LTD  

Reactions of 1,4-dilithio-1,3-butadiene 1 having bulky silyl ligands at the 1,4-positions with group 14 electrophiles were examined. Reactions of 1,4-dilithio-1,3-butadiene 1 with tetraethoxygermane gave diethoxygermole 5, which was hydrolyzed to give stable dihydroxygermole 16. The X-ray diffraction analysis of dihydroxygermole 16 revealed intermolecular hydrogen bonds. The reaction of I with stannous chloride was also examined.

DOI： 10.3987/COM-08-11547

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：PERGAMON-ELSEVIER SCIENCE LTD  

Pentathia- and pentaselena-distannabicyclo[3.1.1]heptanes reacted with tributylphosphine to afford tetrathia- and tetraselena- distanna-bicyclo[2.1.1]hexanes, respectively. The novel heterocyclic framework of a tetrathiadistannabicyclo[2.1.1]hexane was demonstrated by X-ray structural analysis. Structures of a series of pentachalcogena and tetrachalcogena derivatives are discussed.

DOI： 10.3987/COM-08-S(N)38

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：TAYLOR & FRANCIS LTD  

The first example of a stable stannanetellone was synthesized and isolated by taking advantage of kinetic stabilization afforded by the combination of steric protecting groups, 2,6-bis[bis(trimethylsilyl)methyl]-4-[tris(trimethylsilyl)methyl]phenyl (Bbt) and 2,2 '',4,4 ''-tetraisopropyl-m-terphenyl-2'-yl groups. The structural parameters and spectroscopic data of the isolated stannanetellone were systematically compared with those previously reported for the lighter congeners, i. e., the stannanethione and stannaneselone. Attempted synthesis of a stannanetellone by the reaction of dilithiostannane with tellurium dichloride is also described.

DOI： 10.1080/10426500801900865

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：ROYAL SOC CHEMISTRY  

Transmetallation reaction of trisilylstannane ArSn( SiHMe(2))(3) (Ar = 2,6-bis(2,4,6-triisopropylphenyl)phenyl), bearing a bulky substituent on the tin atom, with methyllithium in THF at room temperature gave the first trianion equivalent, trilithiostannane ArSnLi(3), the generation of which was confirmed by trapping experiments with some electrophiles as well as by (119)Sn and (7)Li NMR spectroscopy.

DOI： 10.1039/b815371j

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY-BLACKWELL  

Reduction of dibenzo[a,e]pentalene 3 (denoted as dibenzopentalene hereafter) with excess lithium gave dilithium dibenzopentalenide 1. Since oxidation of I with iodine gave 3, redox behavior between 1 and 3 is controllable and reversible. Reaction of 3 with methyllithium gave lithium 5-methyldibenzopehtalenide 5, the formation of which was evidenced by some trapping experiments and X-ray crystallographic analysis. Reactions of 3 with halogens gave 5,10-dihalodibenzopentalenes, 8 and 9. Some optical properties of novel dibenzopentalene derivatives are also demonstrated.

DOI： 10.1002/chem.200800451

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

The reaction of spirostannabifluorene with methyllithium gave lithium pentaorganostannate, which is an intermediate of the transmetalation reaction on the tin atom and the first example of a stable pentaorganostannate having five carbon substituents. The X-ray structural analysis reveals its slightly distorted trigonal bipyramidal structure, the apical bonds of which have a considerable s character. The unique structure of the lithium pentaorganostannate is also discussed by the aid of theoretical calculations.

DOI： 10.1021/ja072478+

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：JOHN WILEY & SONS LTD  

A novel bulky aryllithium, 2,6-bis{2,5-bis[bis(trimethylsilyl)methyl]phenyl}phenyllithium (BbspLi), was synthesized. Reactions of BbspLi 5 with Group 14 electrophiles, such as stannous chloride, with carbon tetrachloride or tetrachlorometallanes gave fluorene 6. Reaction of BbspLi with carbon tetrachloride gave benzyl chloride 8, which converted to 6 under acidic conditions. BbspLi 5 isomerized to the corresponding benzyl anion 10, which underwent halophilic reactions with Group 14 electrophiles to give fluorene 6 via the benzyl chloride intermediate 8. Copyright (c) 2007 John Wiley & Sons, Ltd.

DOI： 10.1002/aoc.1268

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In the title compound, C24H26SSi2, the fused ring system plus the two Si atoms are coplanar, consistent with planar triphenylene but contrary to bowl-shaped triphenyleno[1,12-bcd:4,5-b'c'd':8,9-b '' c '' d '']-trithiophene. The bond alternation pattern of the C-C bonds in the title compound is similar to that found in triphenyleno[1,12-bcd:4,5-b'c'd':8,9-b '' c '' d '']-trithiophene, although the lengths of the C-C bonds around the central and thiophene rings of the title compound are slightly different from the corresponding bonds of triphenyleno[1,12-bcd:4,5-b'c'd':8,9-b '' c '' d '']-trithiophene.

DOI： 10.1107/S1600536807022337

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

Reaction of steric encumbered trichlorostannane with disodium sulfide or dilithium selenide gave 2,4-dimercapto-1,3,2,4-dithiadistannetane or tetraselenadistannabicyclo[2.1.1]hexane, respectively. Reactions of steric encumbered trihydrostannane with elemental chalcogens gave pentachalcogenadistannabicyclo[k.1.1]heptanes (k = 2 and 3). The two bridgehead tin atoms of the first polychalcogenadistannabicyclo[k.l.m]alkanes are concluded to have no significant bonding interaction, judging from the longer bond distances than those of the normal tin-tin single bonds. (c) 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jorganchem.2007.02.004

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The X-ray crystallographic analysis of a stable stannanethione, Bbt(Titp)Sn = S, reveals that the tin-sulfur bond distance [2.221(3) angstrom] is ca. 10 % shorter than the normal tin-sulfur single bonds and the tin atom of the stannanethione has a trigonal planar geometry, as do as the carbonyl carbon atoms.

DOI： 10.1246/bcsj.80.1202

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DOI： 10.1002/anie.200604067

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A kinetically stabilized stannanetellone was synthesized by the telluration of an extremely hindered stannylene with (n-Bu)(3)Pd=Te. The structure of the stannanetellone was determined by X-ray crystallographic analysis.

DOI： 10.1021/om0604627

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Extremely hindered bis(germacyclopropa)benzenes (3a,b; the IUPAC name is 4,8-digermatricyclo[5.1.0.0(3,5)]octa-1,3(5),6-triene) were synthesized as stable crystalline compounds by the reaction of the corresponding dilithiogermane Tbt(Dip)GeLi2 (8; Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, Dip = 2,6-diisopropylphenyl) with 1,2,4,5-tetrabromobenzene. The structures of the two stereoisomeric his(germacyclopropa)benzenes (3a, cis isomer; 3b, trans isomer) were definitively determined by X-ray crystallographic analysis. The central benzene ring of 3a was found to be folded, in contrast to the planar benzene ring of 3b. The X-ray crystallographic analyses of 3a and 3b and the theoretical calculations for some model molecules revealed that the annelated benzene rings have no distinct bond alternation.

DOI： 10.1021/om0507629

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Exhaustive reduction of an overcrowded dibromostannane bearing two bulky aromatic substituents, Tbt(Dip)SnBr2 {Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl; Dip = 2,6-diisopropylphenyl}, with an excess amount of lithium naphthalenide in THF at -78 degrees C gave the corresponding dilithiostannane, Tbt(Dip)SnLi2, the generation of which was confirmed by trapping experiments with some electrophiles together with Sn-119 and Li-7 NMR spectroscopy. The diaryldilithiostannane was found to be stable in solution under an inert gas below -25 degrees C. The potassium analogue, Tbt(Dip)SnK2, was also generated by the reduction of the dibromostannane in THF at -78 degrees C by the use of KC8 as a reductant. The reactions of dilithiostannane and dipotassiostannane obtained with o-dibromobenzene did not give a stannacyclopropabenzene derivative but an unexpected cyclization product, a stannacyclobutabenzene derivative, in contrast to the reactions of the corresponding dilithiosilane and dilithiogermane, Tbt(Dip)ELi2 (E = Si, Ge), with o-dibromobenzene leading to the formation of the corresponding metallacyclopropabenzenes as stable crystalline compounds. A preliminary result of the synthesis of a tin-tellurium double-bond compound from the dilithiostannane is also presented. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005).

DOI： 10.1002/eijc.200500375

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The thermal reactions of an overcrowded germacyclopropabenzene with group 6 metal hexacarbonyl complexes [M(CO)6] (M = Cr, Mo and W) resulted in the formation of novel Fischer-type carbene complexes via the insertion reaction of a C=O group to the Ge-C bond. By contrast, the germacyclopropabenzene reacts with [Co2(CO)8] to give a germanium analog of benzocyclobutanone via the insertion reaction of a CO unit into the germacyclopropane ring. The reaction of the germacyclopropabenzene with [Mn2(CO)10] resulted in the formation of the intramolecular cyclization product accompanying the migration of a trimethylsilyl group, i.e. a cyclobutabenzene derivative. Copyright © 2005 John Wiley & Sons, Ltd.

DOI： 10.1002/aoc.810

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Thermal reactions of an overcrowded germacyclopropabenzene with hexacarbonyl complexes of group 6 metals resulted in the formation of the corresponding cyclic germoxycarbene complexes, i.e., 1,2-oxagermolan-5-ylidene pentacarbonyl metal complexes, via a novel mode of CO insertion reaction toward cyclopropabenzene derivatives.

DOI： 10.1039/b314010e

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The reactions of an overcrowded diaryldilithiosilane, Tbt(Dip)SiLi2 (Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl; Dip = 2,6-diisopropylphenyl), with o-dibromobenzene and 1,2,4,5-tetrabromobenzene resulted in the synthesis and isolation of the first stable silacyclopropabenzene and bis(silacyclopropa)benzenes (IUPAC name is 4,8-disilatricyclo[5.1.0.0(3,5)]octa-1,3(5),6-triene), respectively. The crystallographic analyses and theoretical calculations revealed that the lengths of the juncture carbon-carbon bonds of the mono- and bis(silacyclopropa)benzenes were marginally in the range of carbon-carbon bond lengths of usual benzene rings. It is shown that this structural feature is attributable to a decrease in the strain energy of silacyclopropabenzenes relative to the corresponding cyclopropabenzenes, and the strain energy is a simple additive function of the number of the fused three-membered rings involving Si atom. (C) 2003 Elsevier B.V. All rights reserved.

DOI： 10.1016/S0022-328X(03)00446-7

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[GRAPHICS]
Thermotropic liquid crystallinity can be induced for an anthracene having a dendritic substituent. The photodimerization reaction of an anthracene moiety in the smectic phase proceeded quantitatively and regioselectively.

DOI： 10.1021/ol0343109

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Photophysical and photochemical properties of poly(amidoamine) dendrons containing an anthracene at the focal point have been studied by the steady-state and transient spectroscopic methods in solution. The fluorescence lifetime of the anthracene moiety in the higher generation dendron (G3.5) is slightly shorter than that of the lower generation homologue (G0.5). On the other hand. the triplet lifetime of G3.5 is longer than that of G0.5. The bimolecular rate constants for energy transfer from the triplet states of the anthracene moiety to O-2 (k(O2)) and for T-T annihilation (k(TT)) were almost the same for the anthryl dendrons, G3.5 and G0.5, suggesting that the dendron groups do not hinder the approach of O-2 or the anthracene moiety. Photodimerization of G3.5 took place at a similar rate to G0.5. while the photodissociation rates of these anthracene dimers increase in the order of anthracene > G0.5 > G3.5, suggesting the presence of some attractive forces between dendron wedges.

DOI： 10.1246/bcsj.76.743

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Two stereoisomers of the first stable bis(silacyclopropa)benzenes (1a, 1b) were successfully synthesized by the reaction of Tbt(Dip)SiLi2 (3) [Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, Dip = 2,6-diisopropylphenyl] with 1,2,4,5-tetrabromobenzene. The molecular structures of 1a and 1b were discussed on the basis of the X-ray structural analyses.

DOI： 10.1246/cl.2003.220

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Crystallization of CaCO3 in the presence of poly(amidoamine) (PAMAM) dendron containing an anthryl group at the focal point and carboxylate groups at the external surface resulted in the formation of spherical vaterite crystals. Furthermore, photodimerization reaction of anthracene unit proceeded within the vaterite crystals upon irradiation.

DOI： 10.1246/cl.2002.1102

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY-V C H VERLAG GMBH  

DOI： 10.1002/1521-3773(20020301)41:5<817::aid-anie817>3.0.co;2-r

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DOI： 10.1002/1521-3773(20020301)41:5<817::AID-ANIE817>3.0.CO;2-R

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Language：Japanese   Publisher：Japanese Liquid Crystal Society  

As a class of new materials, dendrimers have, in recent years, generated a great deal of interest within the scientific community. In particular, there is an increasing focus on developing applications for photoresponsive dendrimers. Recently, we have described dechalcogenation reaction of dendrimer dichalcogenides upon irradiation and a new photoreactive anthracenyl dendron undergoes a reversible photocyclization to form a dendrimer.^<1,2> Interestingly, a poly(amide amine) dendron having anthracene at the focal point undergoes reversible photodimerization within it's liquid-crystalline state. Investigation of thermal behavior of the LC dendron by means of polarizing optical microscopy, differential scanning calorimetry, and X-ray diffraction experiments reveals smectic-type mesophase.

DOI： 10.11538/ekitou.2001.0_479

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A new photoreactive anthracenyl dendron undergoes a reversible photocyclization to form a dendrimer.

DOI： 10.1246/cl.2000.1388

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Language：English   Publisher：WILEY-V C H VERLAG GMBH  

Group 14 monolithio compounds with sterically encumbered terphenyl ligands, ArM14(SiHMe2)(2)Li [M-14 = Si, Ge, Sn; Ar = 2,6-bis(2,6-diisopropylphenyl)phenyl and 2,6-bis(2,4,6-triisopropylphenyl)phenyl], were prepared by transmetalation reactions of ArM14(SiHMe2)(3) with methyllithium, the structures of which were established by X-ray diffraction analysis. The monolithiosilanes and monolithiogermanes reacted with iodomethane and trichlorophosphane to afford the corresponding monomethylated and dichlorophosphane-substituted derivatives, respectively. However, surprisingly, the reactions of monolithiostannanes with iodomethane and trichlorophosphane provided trimethylstannane and trichlorostannane, respectively.

DOI： 10.1002/ejic.201700945

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Language：English   Publisher：CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS  

A new dendritic dispersant of carbon nanotubes (CNTs) was synthesized and applied for the noncovalent functionalization of single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs). The 1,10-bis(decyloxy) decane core of the poly(amidoamine) dendrimer strongly adhered to the sidewalls of CNTs to form CNT/dendrimer supramolecular nanocomposites having many carboxyl groups (-COOH) on the surface. Then, crystallization of calcium carbonate (CaCO3) by the CO2 diffusion technique in aqueous environments using the CNT/dendrimer supramolecular nanocomposites as scaffolds afforded monodisperse spherical CNT/CaCO3 nanohybrids consisting of CNTs and calcite nanocrystals. The morphologies of the SWCNT/CaCO3 hybrids and MWCNT/CaCO3 hybrids were almost the same.

DOI： 10.1139/cjc-2017-0022

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The reaction of (Me4N)(4)[Cd10S4(SPh)(16)] (1) with diphenyl diselenide (2) in propionitrile afforded a molecular cluster, (Me4N)(4)[Cd10S4(SePh)(16)] (3), the structure of which was determined by X-ray crystallography. Ligand exchange proceeded in a heterogeneous reaction system, and the use of a less polar solvent appeared to be crucial for the synthesis of 3 to prevent degradation of the Cd10S4Se16 cluster core.

DOI： 10.1246/bcsj.20160395

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The highly soluble [60]fullerene-pentacene monoadducts 2a and 2b were synthesized by a Diels-Alder reaction between [60]fullerene and pentacene derivatives. The single-crystal X-ray diffraction analysis of 2a revealed an attractive intermolecular interaction between [60]fullerene moiety of one molecule and the pentacene arms of an adjacent molecule, resulting in the formation of head-to-tail dimers in solution. This self-association behavior of 2a and 2b was also observed by (HNMR)-H-1 and fluorescence spectroscopy in chloroform. Both the excitation and emission wavelengths can be modulated via the concentration of 2a and 2b.

DOI： 10.1002/slct.201602074

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Language：English   Publisher：NATURE PUBLISHING GROUP  

Single-walled carbon nanotubes (SWCNTs) are potentially strong optical absorbers with tunable absorption bands depending on their chiral indices (n, m). Their application for solar energy conversion is difficult because of the large binding energy (&gt; 100 meV) of electron-hole pairs, known as excitons, produced by optical absorption. Recent development of photovoltaic devices based on SWCNTs as light-absorbing components have shown that the creation of heterojunctions by pairing chirality-controlled SWCNTs with C-60 is the key for high power conversion efficiency. In contrast to thin film devices, photocatalytic reactions in a dispersion/solution system triggered by the photoexcitation of SWCNTs have never been reported due to the difficulty of the construction of a well-ordered surface on SWCNTs. Here, we show a clear-cut example of a SWCNT photocatalyst producing H-2 from water. Self-organization of a fullerodendron on the SWCNT core affords water-dispersible coaxial nanowires possessing SWCNT/C-60 heterojunctions, of which a dendron shell can act as support of a co-catalyst for H-2 evolution. Because the band offset between the LUMO levels of (8, 3) SWCNT and C-60 satisfactorily exceeds the exciton binding energy to allow efficient exciton dissociation, the (8, 3) SWCNT/fullerodendron coaxial photocatalyst shows H-2-evolving activity (QY = 0.015) upon 680-nm illumination, which is E-22 absorption of (8, 3) SWCNT.

DOI： 10.1038/srep43445

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Thiophene-based dyes bearing two ferrocenylcarbonyl groups were obtained from a short synthesis involving direct arylations of the thiophene rings. A subsequent thionation of the carbonyl groups resulted in the formation of new thiophene-based dyes bearing two ferrocenylthiocarbonyl groups. These dyes absorb in a wide range of the visible spectrum due to their p-p* and d-p* transitions, and show a remarkable red-shift of the absorption band relative to their carbonyl analogues without increasing the molecular size.

DOI： 10.1246/cl.160866

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Language：English   Publisher：ROYAL SOC CHEMISTRY  

A custom-tailored single-walled carbon nanotube (SWCNT) photocatalyst with an electron-extracting TiOx shell, i.e., a SWCNT/fullerodendron/TiOx coaxial nanowire, has been fabricated. Due to the presence of the TiOx shell, the SWCNT/fullerodendron/TiOx coaxial nanowire shows an enhanced photocatalytic activity (Phi = 0.47) for the evolution of hydrogen from water under irradiation with visible light (lambda = 450 nm).

DOI： 10.1039/c7ra05412b

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We succeeded in synthesizing edge-brominated zeolite-templated carbon (ZTC-Br) as the key intermediate of edge-functionalization of ZTC via an electrophilic aromatic substitution reaction using dibromoisocyanuric acid. ZTC-Br was easily converted into carbazole-modified ZTC (ZTC-Cz) using Suzuki-Miyaura coupling. Interestingly, solvent-dependent changes of the fluorescence intensity of ZTC-Cz owing to its swelling shrinking behavior were observed.

DOI： 10.1246/cl.160123

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We succeeded in synthesizing edge-brominated zeolite-templated carbon (ZTC-Br) as the key intermediate of edge-functionalization of ZTC via an electrophilic aromatic substitution reaction using dibromoisocyanuric acid. ZTC-Br was easily converted into carbazole-modified ZTC (ZTC-Cz) using Suzuki-Miyaura coupling. Interestingly, solvent-dependent changes of the fluorescence intensity of ZTC-Cz owing to its swelling shrinking behavior were observed.

DOI： 10.1246/cl.160123

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We succeeded in synthesizing edge-brominated zeolite-templated carbon (ZTC-Br) as the key intermediate of edge-functionalization of ZTC via an electrophilic aromatic substitution reaction using dibromoisocyanuric acid. ZTC-Br was easily converted into carbazole-modified ZTC (ZTC-Cz) using Suzuki-Miyaura coupling. Interestingly, solvent-dependent changes of the fluorescence intensity of ZTC-Cz owing to its swelling shrinking behavior were observed.

DOI： 10.1246/cl.160123

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Language：English   Publishing type：Book review, literature introduction, etc.   Publisher：CHEMICAL SOC JAPAN  

We succeeded in the first isolation of a single pure regioisomer of a C-70-acene monoadduct. 1,9-Diels-Alder monoadducts of C-70 with pentacene derivatives were obtained by not only the Diels-Alder reaction but also a one-pot reaction using stable dihydropentacene derivatives, 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), and C-70. The X-ray crystallographic study of a single pure regioisomer 2b confirmed positions of the linkage between C-70 and acenes for the first time, and revealed unique columnar stacks.

DOI： 10.1246/bcsj.20150378

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Language：English   Publisher：TAYLOR & FRANCIS INC  

Hydrogen gas, which can be used in fuel cells to generate electricity, is considered the ultimate clean energy source. Recently, it was reported that a photo-induced electron transfer system consisting of single-walled carbon nanotubes (SWCNTs) and fullerodendrons shows photo-catalytic activity with a very high quantum yield for splitting water under visible light irradiation. However, the mechanism of high efficiency hydrogen generation is not yet clearly understood. We report here the spectroscopic characterizations of the SWCNT-fullerodendron composites. The results indicate two important fundamental properties of the composite system. First, fullerodendrons preferentially interact with the semiconducting SWCNTs instead of with their metallic counterparts. Second, the photo-induced electron transfer process from the C-60 moiety of fullerodendrons to SWCNTs occurs more efficiently with an increasing tube diameter.

DOI： 10.1080/1536383X.2013.794340

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Hydrogen gas, which can be used in fuel cells to generate electricity, is considered the ultimate clean energy source. Recently, it was reported that a photo-induced electron transfer system consisting of single-walled carbon nanotubes (SWCNTs) and fullerodendrons shows photo-catalytic activity with a very high quantum yield for splitting water under visible light irradiation. However, the mechanism of high efficiency hydrogen generation is not yet clearly understood. We report here the spectroscopic characterizations of the SWCNT-fullerodendron composites. The results indicate two important fundamental properties of the composite system. First, fullerodendrons preferentially interact with the semiconducting SWCNTs instead of with their metallic counterparts. Second, the photo-induced electron transfer process from the C-60 moiety of fullerodendrons to SWCNTs occurs more efficiently with an increasing tube diameter.

DOI： 10.1080/1536383X.2013.794340

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Language：English   Publisher：CHEMICAL SOC JAPAN  

A new pentacene dendrimer was synthesized in 81% yield through the aromatization of a dihydropentacene derivative having benzyl ether dendrons at the C2, C3, C9, and C10 positions. The dendrimer is very soluble in various organic solvents such as toluene, benzene, chloroform, dichloromethane, acetone, and ethyl acetate. The half-life of the dendrimer reaches 22.4 min upon photoirradiation in air. Interestingly, regiospecific [4 + 2] cycloaddition reactions proceeded at the central ring of the pentacene.

DOI： 10.1246/cl.2012.1622

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A new pentacene dendrimer was synthesized in 81% yield through the aromatization of a dihydropentacene derivative having benzyl ether dendrons at the C2, C3, C9, and C10 positions. The dendrimer is very soluble in various organic solvents such as toluene, benzene, chloroform, dichloromethane, acetone, and ethyl acetate. The half-life of the dendrimer reaches 22.4 min upon photoirradiation in air. Interestingly, regiospecific [4 + 2] cycloaddition reactions proceeded at the central ring of the pentacene.

DOI： 10.1246/cl.2012.1622

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Calcium carbonate (CaCO3) in the presence of single-walled carbon nanotube (SWCNT) /fullerodendron supramolecular nanocomposites was crystallized with a CO2 diffusion method under ambient conditions and in aqueous environments to produce monodisperse spherical SWCNT/CaCO3 hybrids with a core-shell structure. The crystals nucleate at the carboxyl groups on the surface of the SWCNT/fullerodendron supramolecular nanocomposites grow around a spherical scaffold consisting of the SWCNTs, and finally form spherical calcite crystals embedded with and covered by the SWCNTs. Owing to of the phase transition from vaterite to calcite through a solvent-mediated process, the morphology of the microspheres is unique; the shell is primarily composed of calcite crystals of CaCO3, and a greater amount of SWCNTs is embedded in the core moiety. Polymer Journal (2012) 44, 620-624; doi:10.1038/pj.2012.36; published online 18 April 2012

DOI： 10.1038/pj.2012.36

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Calcium carbonate (CaCO3) in the presence of single-walled carbon nanotube (SWCNT) /fullerodendron supramolecular nanocomposites was crystallized with a CO2 diffusion method under ambient conditions and in aqueous environments to produce monodisperse spherical SWCNT/CaCO3 hybrids with a core-shell structure. The crystals nucleate at the carboxyl groups on the surface of the SWCNT/fullerodendron supramolecular nanocomposites grow around a spherical scaffold consisting of the SWCNTs, and finally form spherical calcite crystals embedded with and covered by the SWCNTs. Owing to of the phase transition from vaterite to calcite through a solvent-mediated process, the morphology of the microspheres is unique; the shell is primarily composed of calcite crystals of CaCO3, and a greater amount of SWCNTs is embedded in the core moiety. Polymer Journal (2012) 44, 620-624; doi:10.1038/pj.2012.36; published online 18 April 2012

DOI： 10.1038/pj.2012.36

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Language：English   Publisher：WILEY-BLACKWELL  

A coaxial nanohybrid consisting of a single- walled carbon nanotube (SWCNT), fullerodendron, and SiO(2) shows higheffi ciency light- driven hydrogen evolution from water. Upon visible light irradiation, SWCNT/ fullerodendron/SiO(2) coaxial nano hybrid shows hydrogen evolution activity in the presence of methyl viologen (MV(2+)), benzyldihydronicotinamide (BNAH), and a colloidal polyvinyl alcohol(PVA)-Pt.

DOI： 10.1002/adma.201103472

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Language：English   Publisher：WILEY-BLACKWELL  

A coaxial nanohybrid consisting of a single- walled carbon nanotube (SWCNT), fullerodendron, and SiO(2) shows higheffi ciency light- driven hydrogen evolution from water. Upon visible light irradiation, SWCNT/ fullerodendron/SiO(2) coaxial nano hybrid shows hydrogen evolution activity in the presence of methyl viologen (MV(2+)), benzyldihydronicotinamide (BNAH), and a colloidal polyvinyl alcohol(PVA)-Pt.

DOI： 10.1002/adma.201103472

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Language：English   Publisher：WILEY-BLACKWELL  

Reduction of dibenzo[a,e]pentalene 3 (denoted as dibenzopentalene hereafter) with excess lithium gave dilithium dibenzopentalenide 1. Since oxidation of I with iodine gave 3, redox behavior between 1 and 3 is controllable and reversible. Reaction of 3 with methyllithium gave lithium 5-methyldibenzopehtalenide 5, the formation of which was evidenced by some trapping experiments and X-ray crystallographic analysis. Reactions of 3 with halogens gave 5,10-dihalodibenzopentalenes, 8 and 9. Some optical properties of novel dibenzopentalene derivatives are also demonstrated.

DOI： 10.1002/chem.200800451

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Language：Japanese  

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Language：English  

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Applicant：国立大学法人 岡山大学

Application no：特願2013-153089  Date applied：2013.7.23

Announcement no：特開2015-020998  Date announced：2015.2.2

Patent/Registration no：特許第6179011号  Date registered：2017.7.28  Date issued：2017.7.28

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Applicant：国立大学法人 岡山大学

Application no：特願2013-153089  Date applied：2013.7.23

Announcement no：特開2015-020998  Date announced：2015.2.2

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Applicant：国立大学法人 岡山大学

Application no：特願2012-094458  Date applied：2012.4.18

Announcement no：特開2013-220980  Date announced：2013.10.28

Patent/Registration no：特許第6097490号  Date registered：2017.2.24  Date issued：2017.2.24

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Applicant：国立大学法人 岡山大学

Application no：特願2012-094458  Date applied：2012.4.18

Announcement no：特開2013-220980  Date announced：2013.10.28

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Applicant：国立大学法人 岡山大学

Application no：特願2012-012684  Date applied：2012.1.25

Announcement no：特開2013-151387  Date announced：2013.8.8

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Applicant：国立大学法人 岡山大学

Application no：特願2010-136445  Date applied：2010.6.15

Announcement no：特開2012-001463  Date announced：2012.1.5

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Applicant：国立大学法人 岡山大学

Application no：特願2010-136445  Date applied：2010.6.15

Announcement no：特開2012-001463  Date announced：2012.1.5

Patent/Registration no：特許第5652856号  Date registered：2014.11.28  Date issued：2014.11.28

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