2021/07/12 更新

写真a

オカモト ヒデキ
岡本 秀毅
OKAMOTO Hideki
所属
自然科学学域 准教授
職名
准教授
外部リンク

学位

  • 博士(理学) ( 岡山大学 )

研究キーワード

  • Organic photochemistry

  • Functional chemistry

  • Chemiluninecence

  • 発光センサー

  • 機能化学

  • 化学発光

  • 有機光化学

  • Luminescent sensor

研究分野

  • ナノテク・材料 / 機能物性化学

  • ライフサイエンス / 生物有機化学

  • ナノテク・材料 / 構造有機化学、物理有機化学

経歴

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

    2009年

      詳細を見る

  • - 岡山大学自然科学研究科機能分子化学専攻 准教授

    2009年

      詳細を見る

  • Researcher

    1999年 - 2000年

      詳細を見る

  • Wuerzburg University 研究員

    1999年 - 2000年

      詳細を見る

所属学協会

委員歴

  • 日本化学会   代表正会員  

    2009年 - 2014年   

      詳細を見る

    団体区分:学協会

    日本化学会

    researchmap

 

論文

  • Synthesis of the extended phenacene molecules, [10]phenacene and [11]phenacene, and their performance in a field-effect transistor 査読

    Hideki Okamoto, Shino Hamao, Ritsuko Eguchi, Hidenori Goto, Yasuhiro Takabayashi, Paul Yu Hsiang Yen, Luo Uei Liang, Chia Wei Chou, Germar Hoffmann, Shin Gohda, Hisako Sugino, Yen Fa Liao, Hirofumi Ishii, Yoshihiro Kubozono

    Scientific Reports   9 ( 1 )   2019年12月

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    © 2019, The Author(s). The [10]phenacene and [11]phenacene molecules have been synthesized using a simple repetition of Wittig reactions followed by photocyclization. Sufficient amounts of [10]phenacene and [11]phenacene were obtained, and thin-film FETs using these molecules have been fabricated with SiO 2 and ionic liquid gate dielectrics. These FETs operated in p-channel. The averaged measurements of field-effect mobility, <μ>, were 3.1(7) × 10 −2 and 1.11(4) × 10 −1 cm 2 V −1 s −1 , respectively, for [10]phenacene and [11]phenacene thin-film FETs with SiO 2 gate dielectrics. Furthermore, [10]phenacene and [11]phenacene thin-film electric-double-layer (EDL) FETs with ionic liquid showed low-voltage p-channel FET properties, with <μ> values of 3(1) and 1(1) cm 2 V −1 s −1 , respectively. This study also discusses the future utility of the extremely extended π-network molecules [10]phenacene and [11]phenacene as the active layer of FET devices, based on the experimental results obtained.

    DOI: 10.1038/s41598-019-39899-4

    Web of Science

    Scopus

    PubMed

    researchmap

  • Synthesis and photophysical properties of blue-color emitting compounds having multi N-methylanthranillic (MANT) chromophore 査読

    Minoru Yamaji, Kanae Sano, Hideki Okamoto, Ichiro Matsuo

    Journal of Photochemistry and Photobiology A: Chemistry   400   2020年9月

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    © 2020 Elsevier B.V. We prepared various compounds having the N-methylaminoanthranyl (MANT) moiety tethered with oligomethylene chains, and investigated the photophysical features in solution and the solid state based on the fluorescence quantum yields and lifetimes, and quantum chemical calculation. The molar absorption coefficient and fluorescence quantum yield were enhanced by an increase of the number of the MANT chromophore, resulting in an increase of the brightness as emission probes. Solid-state blue emission at room temperature was observed with moderate fluorescence quantum yields. The fluorescence rates in the solid state were found to be similar those in solution. From the results of the transient absorption measurements, the photophysical deactivation pathways in the solution were discussed. The studied multi-MANT compounds could be applicable to emissive photonic crystals and an exciton generating source for blue-color OLED.

    DOI: 10.1016/j.jphotochem.2020.112650

    Scopus

    researchmap

  • Facile synthesis of picenes incorporating imide moieties at both edges of the molecule and their application to: N -channel field-effect transistors 査読

    Yuxin Guo, Kaito Yoshioka, Shino Hamao, Yoshihiro Kubozono, Fumito Tani, Kenta Goto, Hideki Okamoto

    RSC Advances   10 ( 52 )   31547 - 31552   2020年8月

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    © The Royal Society of Chemistry. Picene derivatives incorporating imide moieties along the long-axis direction of the picene core (Cn-PicDIs) were conveniently synthesized through a four-step synthesis. Photochemical cyclization of dinaphthylethenes was used as the key step for constructing the picene skeleton. Field-effect transistor (FET) devices of Cn-PicDIs were fabricated by using ZrO2 as a gate substrate and their FET characteristics were investigated. The FET devices showed normally-off n-channel operation; the averaged electron mobility (μ) was evaluated to be 2(1) × 10-4, 1.0(6) × 10-1 and 1.4(3) × 10-2 cm2 V-1 s-1 for C4-PicDI, C8-PicDI and C12-PicDI, respectively. The maximum μ value as high as 2.0 × 10-1 cm2 V-1 s-1 was observed for C8-PicDI. The electronic spectra of Cn-PicDIs in solution showed the same profiles irrespective of the alkyl chain lengths. In contrast, in thin films, the UV absorption and photoelectron yield spectroscopy (PYS) indicated that the lowest unoccupied molecular orbital (LUMO) level of Cn-PicDIs gradually lowered upon the elongation of the alkyl chains, suggesting that the alkyl chains modify intermolecular interactions between the Cn-PicDI molecules in thin films. The present results provide a new strategy for constructing a high performance n-channel organic semiconductor material by utilizing the electronic features of phenacenes. This journal is

    DOI: 10.1039/d0ra06629j

    Scopus

    researchmap

  • Synthesis of [7]phenacene incorporating tetradecyl chains in the axis positions and its application in field-effect transistors 査読

    Hideki Okamoto, Shino Hamao, Keiko Kozasa, Yanan Wang, Yoshihiro Kubozono, Yong He Pan, Yu Hsiang Yen, Germar Hoffmann, Fumito Tani, Kenta Goto

    Journal of Materials Chemistry C   8 ( 22 )   7422 - 7435   2020年6月

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    © The Royal Society of Chemistry 2020. Field-effect transistors (FETs) were fabricated using a new type of phenacene molecule, 3,12-ditetradecyl[7]phenacene ((C14H29)2-[7]phenacene), and solid gate dielectrics or an electric double layer (EDL) capacitor with an ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate (bmim[PF6])). The new molecule, (C14H29)2-[7]phenacene, was efficiently synthesizedviathe Mallory photoreaction. Its crystal structure and electronic properties were determined, using X-ray diffraction, scanning tunneling microscopy/spectroscopy (STM and STS), absorption spectroscopy, and photoelectron yield spectroscopy, which showed a monoclinic crystal lattice (space groupP21(no. 4)) and an energy gap of ∼3.0 eV. The STM image clearly showed the molecular structure of (C14H29)2-[7]phenacene, as well as the closed molecular stacking, indicative of a strong fastener effect between alkyl chains. The X-ray diffraction pattern of thin films of (C14H29)2-[7]phenacene formed on a SiO2/Si substrate suggested that the molecule stood on the surface with an inclined angle of 30° with respect to the normal axis of the surface. The FET properties were recorded in two-terminal measurement mode, showing p-channel normally-off characteristics. The averaged values of field-effect mobility,μ, were 1.6(3) cm2V−1s−1for a (C14H29)2-[7]phenacene thin-film FET with a SiO2gate dielectric and 6(4) × 10−1cm2V−1s−1for a (C14H29)2-[7]phenacene thin-film EDL FET with bmim[PF6]. Thus, higher FET performance was obtained with an FET using a thin film of (C14H29)2-[7]phenacene compared to parent [7]phenacene. This study could pioneer an avenue for the realization of high-performance FETs through the addition of alkyl chains to phenacene molecules.

    DOI: 10.1039/d0tc00272k

    Scopus

    researchmap

  • Blue fluorescence from N,O-coordinated BF2 complexes having aromatic chromophores in solution and the solid state 査読

    Minoru Yamaji, Kazuhiro Tomonari, Keisuke Ikuma, Kenta Goto, Fumito Tani, Hideki Okamoto

    PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES   18 ( 12 )   2884 - 2892   2019年12月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    We prepared amide-heterocycle (HC) compounds having various aromatic pi-electron systems (Ar), such as phenyl, naphthyl, furyl, thienyl and phenanthryl moieties, and converted them as ligands to difluoroboronated complexes, Ar@HCs. Blue fluorescence from Ar@HCs was observed in solution and the solid state, and the fluorescence quantum yields (phi(f)) and lifetimes (tau(f)) were determined. The phi(f) values in CHCl3 were as small as 0.1 except for the phenanthrene derivatives (0.4-0.6). Observation of the triplet-triplet absorption upon laser flash photolysis of Ar@HCs in solution indicated that the fluorescence process competes with intersystem crossing to the triplet state. Blue fluorescence in the solid state was observed with the phi(f) values of 0.3-0.7. Based on the crystallographic data, the relationship between the crystal structures and emission features of Ar@HCs in the solid state is discussed.

    DOI: 10.1039/c9pp00410f

    Web of Science

    researchmap

  • Low-voltage organic thin-film transistors based on [n] phenacenes 査読

    Al Ruzaiqi Afra, Okamoto Hideki, Kubozono Yoshihiro, Zschieschang Ute, Klauk Hagen, Baran Peter, Gleskova Helena

    ORGANIC ELECTRONICS   73   286 - 291   2019年10月

  • Fabrication of flexible high-performance organic field-effect transistors using phenacene molecules and their application toward flexible CMOS inverters 査読

    Pompei Emanuela, Turchetti Claudio, Hamao Shino, Miura Akari, Goto Hidenori, Okamoto Hideki, Fujiwara Akihiko, Eguchi Ritsuko, Kubozono Yoshihiro

    JOURNAL OF MATERIALS CHEMISTRY C   7 ( 20 )   6022 - 6033   2019年5月

  • Distinctive effects on fluorescence quantum yields of 4-substituted N-methylphthalimides by inclusion complexation with -cyclodextrins 査読

    Sueishi Yoshimi, Matsumoto Yuki, Sohama Junko, Osawa Yoshihiro, Okamoto Hideki

    JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY   93 ( 3-4 )   275 - 281   2019年4月

  • Fabrication of flexible high-performance organic field-effect transistors using phenacene molecules and their application toward flexible CMOS inverters 査読

    Emanuela Pompei, Claudio Turchetti, Shino Hamao, Akari Miura, Hidenori Goto, Hideki Okamoto, Akihiko Fujiwara, Ritsuko Eguchi, Yoshihiro Kubozono

    Journal of Materials Chemistry C   7 ( 20 )   6022 - 6033   2019年

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    © 2019 The Royal Society of Chemistry. The transport properties of 3,10-ditetradecylpicene ((C14H29)2-picene) and [6]phenacene thin-film field-effect transistors (FETs) on Si and plastic substrates are reported, in which SiO2 and parylene are used as gate dielectrics, respectively. These devices show p-channel normally-off FET characteristics. A μ value of 1.34 cm2 V-1 s-1 is obtained in the (C14H29)2-picene thin-film FET, where 500 μm thick polyethylene terephthalate (PET) and 1 μm thick parylene are used as the substrate and gate dielectric, respectively. Moreover, excellent FET performance is obtained in the (C14H29)2-picene thin-film FET using a high-k gate dielectric, ZrO2, which is formed on a 350 μm thick PET substrate, showing p-channel normally-off FET properties and low voltage operation. The μ value reaches 6.31 cm2 V-1 s-1 in the FET device. The FET properties of N,N′-dioctyl-3,4,9,10-perylenedicarboximide (PTCDIC8) thin-film FETs formed on PET are also reported, showing n-channel normally-off FET characteristics. We report a bias stress effect on flexible [6]phenacene thin film FETs that are fabricated on a PEN substrate. Two types of experiments are performed for investigating the bias stress effect on FETs, and the bias stress effect under light irradiation is very different from that under no irradiation. This difference is well explained based on the hole-filling of trap states by electron excitation. We show the characteristics of a complementary MOS inverter (CMOS), constituting a [6]phenecene thin-film FET (p-channel) and a PTCDIC8 thin-film FET (n-channel) formed on the PET and PEN substrates, i.e., a flexible CMOS inverter. The maximum gain reaches 300. Furthermore, we report low-voltage operation for the flexible CMOS inverter, where ZrO2 is used as the gate dielectric. Through this study, we have achieved the fabrication of flexible thin-film FETs with a high μ and low voltage operation, and flexible CMOS inverters with a high gain as well as low operation voltage. This study could provide a basis for future practical/human-compatible electronic devices.

    DOI: 10.1039/c8tc05824e

    Scopus

    researchmap

  • Fluorescence behaviour of 2-, 3-and 4-amino-1,8-naphthalimides: effects of the substitution positions of the amino functionality on the photophysical properties 査読

    Wang Lei, Fujii Mayu, Yamaji Minoru, Okamoto Hideki

    PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES   17 ( 10 )   1319 - 1328   2018年10月

  • Synthesis of isomeric coumarin-fluorene hybrids by photocyclization and the photophysical features

    Minoru Yamaji, Hideki Okamoto, Kenta Goto, Shin-ichiro Kato, Fumito Tani, Yosuke Nakamura

    TETRAHEDRON LETTERS   59 ( 13 )   1216 - 1219   2018年3月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD  

    We prepared isomeric compounds 2a and 2b having fused skeletons of coumarin and fluorene by photochemical cyclization of olefin 1. They were successfully separated by chromatography, and characterized by NMR spectroscopic and X-ray crystallographic analyses. The molecular structure of 2a was nonplanar due to the repulsion between the carbonyl group of the coumarin moiety and the methylene group at 9-position on the fluorene skeleton whilst that of 2b was planar. They showed different absorption and fluorescence features in solution whereas their spectral profiles of triplet-triplet absorption and phosphorescence were similar to each other. (C) 2018 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.tetlet.2018.02.033

    Web of Science

    researchmap

  • Excited-state intramolecular proton transfer (ESIPT) fluorescence from 3-amidophthalimides displaying RGBY emission in the solid state

    Hideki Okamoto, Kazumasa Itani, Minoru Yamaji, Hiroyuki Konishi, Hiromi Ota

    Tetrahedron Letters   59 ( 4 )   388 - 391   2018年1月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier Ltd  

    Fluorescence properties of phthalimide derivatives (1) incorporating sulfonamide and acetamide functionalities at the 3-position were investigated both in solution and in the solid states to reveal the effects of the amide functionalities on the fluorescence properties. In the solid state, sulfonamides 1a and 1b, respectively, gave off red (λF max 595 nm) and green (λF max 537 nm) emission through an ESIPT process. Acetamides 1c and 1d, respectively displayed blue (λF max 432 nm) and yellow (λF max 560 nm) emission. Through simply modifying the amide functionality, phthalimide 1 displayed multicolor RGBY emission in the solid state.

    DOI: 10.1016/j.tetlet.2017.12.049

    Scopus

    researchmap

  • Photophysical features of naphthols having esters, formyl and acetyl groups and the difluoroboronated complex in solution and the solid state

    Minoru Yamajia, Hideki Okamoto

    Journal of Photochemistry and Photobiology A: Chemistry   360   204 - 209   2018年

  • Blue Fluorescence from BF2 Complexes of N,O-Benzamide Ligands: Synthesis, Structure, and Photophysical Properties

    Minoru Yamaji, Shin-Ichiro Kato, Kazuhiro Tomonari, Michitaka Mamiya, Kenta Goto, Hideki Okamoto, Yosuke Nakamura, Fumito Tani

    INORGANIC CHEMISTRY   56 ( 20 )   12514 - 12519   2017年10月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    Small molecules having intense luminescence properties are required to promote biological and organic material applications. We prepared five types of benzamides having pyridine, pyridazine, pyrazine, and pyrimidine rings and successfully converted them into three types of the difluoroboronated complexes, Py@BAs, as novel blue fluorophores. Py@BA having a pyridine moiety (2-Py@BA) showed no fluorescence in solution, whereas Py@BAs of pyridazine and pyrazine moieties (2,3-Py@BA and 2,5-Py@BA, respectively) emitted blue fluorescence with quantum yields of ca. 0.1. Transient absorption measurements using laser flash photolysis of the Py@BAs revealed the triplet formation of 2,3- and 2,5-Py@BAs, while little transient signal was observed for 2-Py@BA. Therefore, the deactivation processes from the lowest excited singlet state of fluorescent 2,3- and 2,5-Py@BAs consist of fluorescence and intersystem crossing to the triplet state while that of the nonfluorescent Py@BA is governed almost entirely by internal conversion to the ground state. Conversely, in the solid state, 2-Py@BA emitted intense fluorescence with a fluorescence quantum yield as high as 0.66, whereas 2,3- and 2,5-Py@BAs showed fluorescence with quantum yields of ca. 0.2. The crystal structure of 2-Py@BA took a herringbone packing motif, whereas those for 2,3- and 2,5-Py@BAs were two-dimensional sheetlike. On the basis of the difference in crystal structures, the emission mechanism in the solid state was discussed.

    DOI: 10.1021/acs.inorgchem.7b02013

    Web of Science

    researchmap

  • Synthesis, structure, and photoreactions of fluorinated 2,11-diaza[3(2)] paracyclophane: Photochemical formation of cage-diene type benzene dimer

    Hideki Okamoto, Tetsuya Kozai, Zenji Okabayashi, Teruo Shinmyozu, Hiromi Ota, Kiichi Amimoto, Kyosuke Satake

    JOURNAL OF PHYSICAL ORGANIC CHEMISTRY   30 ( 9 )   139 - 144   2017年9月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY  

    An octafluorinated 2,11-diaza[3(2)] paracyclophane derivative 12 was prepared, and its photochemical reaction was investigated. Upon irradiation at 300 nm, the fluorinated azacyclophane 12 underwent efficient photodimerization of the benzene cores to afford the corresponding photoisomer 13, which possessed cage diene benzene dimer structure (pentacyclo[6.4.0.0.(2,7)0.(3,12)0(6,9)] dodeca-4,10-diene skeleton). The cage diene structure was established by single-crystal X-ray diffraction analysis. The cage diene 13 thermally isomerized to a syn-o,o'-dibenzene isomer 22. The activation parameters for the thermal isomerization were determined to be E-a = 121 kJ mol(-1), Delta H-not equal = 118 kJ mol(-1), Delta S-(293 K)(not equal) = 22 J mol(-1) K-1, and Delta G(not equal) ((293 K)) = 111 kJ mol(-1). It was revealed that, by photoirradiation at 300 nm, the syn-o,o'-dibenzene isomer 22 underwent facile intramolecular [pi 4s + pi 4s] cycloaddition to reproduce the cage diene isomer 13

    DOI: 10.1002/poc.3726

    Web of Science

    researchmap

  • Convenient Phenacene Synthesis by Sequentially Performed Wittig Reaction and Mallory Photocyclization Using Continuous-Flow Techniques

    Hideki Okamoto, Haruhiko Takahashi, Takamitsu Takane, Yasuhiro Nishiyama, Kiyomi Kakiuchi, Shin Gohda, Minoru Yamaji

    SYNTHESIS-STUTTGART   49 ( 13 )   2949 - 2957   2017年7月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:GEORG THIEME VERLAG KG  

    Various phenacenes possessing chrysene, picene, and fulminene frameworks were prepared by using a continuous-flow synthetic protocol in which Wittig reaction affording diarylethenes and their Mallory photocyclization producing phenacene skeletons were sequentially performed. The Wittig reaction solution, containing the diarylethene obtained from an arylaldehyde and an arylmethyltriphenylphosphonium salt, was mixed with an iodine solution in the flow system and, subsequently, the solution was subjected to the photoreaction. Desired phenacenes were obtained with high to moderate chemical yield. For the present protocol, isolation of the intermediary diarylethene, which is the key precursor of the phenacene, is unnecessary. The approach provides a convenient method to supply a variety of phenacene samples, which are needed for initial systematic surveys in material science.

    DOI: 10.1055/s-0036-1588775

    Web of Science

    researchmap

  • Systematic investigations on fused π-system compounds of seven benzene rings prepared by photocyclization of diphenanthrylethenes

    Shota Fujino, Minoru Yamaji, Hideki Okamoto, Toshiki Mutai, Isao Yoshikawa, Hirohiko Houjou, Fumito Tani

    Photochemical and Photobiological Sciences   16 ( 6 )   925 - 934   2017年6月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/c7pp00040e

    Web of Science

    researchmap

  • Adsorption of Phenacenes on a Metallic Substrate: Revisited

    Song-Wen Chen, I-Chen Sang, Hideki Okamoto, Germar Hoffmann

    JOURNAL OF PHYSICAL CHEMISTRY C   121 ( 21 )   11390 - 11398   2017年6月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    Phenacenes represent.a class of simple hydrocarbons with appealing physical properties ranging from high charge mobility to superconductivity in combination with chemical robustness that are easily modified to serve as versatile building blocks for tailored structures. As a promising candidate for applications in organic devices, phenacenes are the focus of recent investigations. Thereby, the initial growth behavior starting from a single molecule is controversial. Here, we address the growth of [7]phenacene and [9]phenacene on a Ag(111) surface, studying the details of the initial stage of growth by scanning tunneling microscopy. According to our results, a previously introduced model involving a coverage-dependent phase change with the out-of-plane rotation of molecules in the initial growth stage can be disregarded. Instead, we find evidence for the formation of a new phase on top of an in-plane wetting layer during the initial stage of growth.

    DOI: 10.1021/acs.jpcc.7b01806

    Web of Science

    researchmap

  • Photochemical synthesis and photophysical properties of coumarins bearing extended polyaromatic rings studied by emission and transient absorption measurements

    Minoru Yamaji, Yuma Hakoda, Hideki Okamoto, Fumito Tani

    PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES   16 ( 4 )   555 - 563   2017年4月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    We prepared a variety of coumarin derivatives having expanded pi-electron systems along the direction crossing the C-3-C-4 bond of the coumarin skeleton via a photochemical cyclization process and investigated their photophysical features as a function of the number (n) of the added benzene rings based on emission and transient absorption measurements. Upon increasing n, the fluorescence quantum yields of the pi-extended coumarins increased. Expanding the p-electron system on the C-3-C-4 bond of the coumarin skeleton was found to be efficient for increasing the fluorescence ability more than that on the C-7-C-8 bond. Introducing the methoxy group at the 7-position was also efficient for enhancing the fluorescence quantum yield and rate of the expanded coumarins. The non-radiative process from the fluorescence state was not substantially influenced by the expanded pi-electron system. The competitive process with the fluorescence was found to be intersystem crossing to the triplet state based on the observations of the triplet-triplet absorption. The effects of the expanded pi-electron systems on the fluorescence ability were investigated with the aid of TD-DFT calculations.

    DOI: 10.1039/c6pp00399k

    Web of Science

    researchmap

  • Chemical analysis of superconducting phase in K-doped picene

    Takashi Kambe, Saki Nishiyama, Huyen L. T. Nguyen, Takahiro Terao, Masanari Izumi, Yusuke Sakai, Lu Zheng, Hidenori Goto, Yugo Itoh, Taiki Onji, Tatsuo C. Kobayashi, Hisako Sugino, Shin Gohda, Hideki Okamoto, Yoshihiro Kubozono

    JOURNAL OF PHYSICS-CONDENSED MATTER   28 ( 44 )   2016年11月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IOP PUBLISHING LTD  

    Potassium-doped picene (K(3.0)picene) with a superconducting transition temperature (TC) as high as 14 K at ambient pressure has been prepared using an annealing technique. The shielding fraction of this sample was 5.4% at 0 GPa. The TC showed a positive pressure-dependence and reached 19 K at 1.13 GPa. The shielding fraction also reached 18.5%. To investigate the chemical composition and the state of the picene skeleton in the superconducting sample, we used energy-dispersive x-ray (EDX) spectroscopy, MALDI-time-of-flight (MALDI-TOF) mass spectroscopy and x-ray diffraction (XRD). Both EDX and MALDI-TOF indicated no contamination with materials other than K-doped picene or K-doped picene fragments, and supported the preservation of the picene skeleton. However, it was also found that a magnetic K-doped picene sample consisted mainly of picene fragments or K-doped picene fragments. Thus, removal of the component contributing the magnetic quality to a superconducting sample should enhance the volume fraction.

    DOI: 10.1088/0953-8984/28/44/444001

    Web of Science

    researchmap

  • Recent progress on carbon-based superconductors 査読

    Kubozono Yoshihiro, Eguchi Ritsuko, Goto Hidenori, Hamao Shino, Kambe Takashi, Terao Takahiro, Nishiyama Saki, Zheng Lu, Miao Xiao, Okamoto Hideki

    JOURNAL OF PHYSICS-CONDENSED MATTER   28 ( 33 )   2016年8月

  • Synthesis and photophysical properties of difluoroboronated β-diketones with the fluorene moiety that have high fluorescence quantum yields

    Yurie Suwa, Minoru Yamaji, Hideki Okamoto

    Tetrahedron Letters   57 ( 15 )   1695 - 1698   2016年4月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.tetlet.2016.03.011

    Web of Science

    researchmap

  • Synthesis and transistor application of the extremely extended phenacene molecule, [9] phenacene

    Yuma Shimo, Takahiro Mikami, Shino Hamao, Hidenori Goto, Hideki Okamoto, Ritsuko Eguchi, Shin Gohda, Yasuhiko Hayashi, Yoshihiro Kubozono

    SCIENTIFIC REPORTS   6   2016年2月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:NATURE PUBLISHING GROUP  

    the widespread interest in the chemistry, physics and materials science of such molecules and their potential applications. In particular, extended phenacene molecules, consisting of coplanar fused benzene rings in a repeating W-shaped pattern have attracted much attention because field-effect transistors (FETs) using phenacene molecules show promisingly high performance. Until now, the most extended phenacene molecule available for transistors was [8] phenacene, with eight benzene rings, which showed very high FET performance. Here, we report the synthesis of a more extended phenacene molecule, [9] phenacene, with nine benzene rings. Our synthesis produced enough [9] phenacene to allow the characterization of its crystal and electronic structures, as well as the fabrication of FETs using thin-film and single-crystal [9] phenacene. The latter showed a field-effect mobility as high as 18 cm(2) V-1 s(-1), which is the highest mobility realized so far in organic single-crystal FETs.

    DOI: 10.1038/srep21008

    Web of Science

    researchmap

  • Preparation and photophysical properties of fluorescent difluoroboronated β-diketones having phenanthrene moieties studied by emission and transient absorption measurements

    Michitaka Mamiya, Yurie Suwa, Hideki Okamoto, Minoru Yamaji

    Photochemical and Photobiological Sciences   15 ( 2 )   278 - 286   2016年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/c5pp00454c

    Web of Science

    researchmap

  • Solvent-induced multicolour fluorescence of amino-substituted 2,3-naphthalimides studied by fluorescence and transient absorption measurements

    Mayu Fujii, Misa Namba, Minoru Yamaji, Hideki Okamoto

    PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES   15 ( 7 )   842 - 850   2016年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    A series of amino-2,3-naphthalimide derivatives having the amino functionality at 1-, 5-and 6-positions (1ANI, 5ANI and 6ANI, respectively) were prepared, and their photophysical properties were systematically investigated based on the measurements of steady-state absorption and fluorescence spectra, fluorescence lifetimes as well as transient absorption spectra. The ANIs efficiently fluoresced in solution, and the emission spectra appreciably shifted depending on the solvent polarity. 1ANI displayed only a slight fluorescence red-shift upon increasing the solvent polarity. In contrast, 5ANI and 6ANI showed marked positive solvatofluorochromism with large Stokes shifts displaying multicolour fluorescence; the fluorescence colours of 5ANI and 6ANI varied from violet-blue in hexane to orange-red in methanol. 5ANI and 6ANI, thus, serve as micro-environment responding fluorophores. In methanol, the intensity of the fluorescence emission band of 5ANI and 6ANI significantly reduced. Based on the fluorescence quantum yields and lifetimes, and transient absorption measurements, it has been revealed that internal conversion from the S-1 state of ANIs to the ground state was accelerated by the protic medium, resulting in a reduction in their fluorescence efficiency, while intersystem crossing from the S1 state to a triplet state was not responsible for the decrease of fluorescence intensity.

    DOI: 10.1039/c6pp00048g

    Web of Science

    researchmap

  • Photochemically-assisted synthesis and photophysical properties of difluoroboronated β-diketones with fused four-benzene-ring chromophores, chrysene and pyrene

    Michitaka Mamiya, Yurie Suwa, Hideki Okamoto, Minoru Yamaji

    Photochemical and Photobiological Sciences   15 ( 7 )   928 - 936   2016年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/c6pp00089d

    Web of Science

    researchmap

  • Photophysical and photochemical processes of excited singlet and triplet [3n]cyclophanes (n = 2–6) studied by emission measurements, steady-state and laser flash photolyses

    Minoru Yamaji, Hideki Okamoto, Yuhko Hakoshima, Teruo Shinmyozu

    J. Phys. Chem. A   119 ( 10 )   1867 - 1874   2015年3月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/jp511105v

    Web of Science

    researchmap

  • Transistors fabricated using the single crystals of [8]phenacene 査読

    Yuma Shimo, Takahiro Mikami, Hiroto T. Murakami, Shino Hamao, Hidenori Goto, Hideki Okamoto, Shin Gohda, Kaori Sato, Antonio Cassinese, Yasuhiko Hayashi, Yoshihiro Kubozono

    JOURNAL OF MATERIALS CHEMISTRY C   3 ( 28 )   7370 - 7378   2015年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    Field-effect transistors (FETs) with single crystals of a new phenacene-type molecule, [8]phenacene, were fabricated and characterized. This new molecule consists of a phenacene core of eight benzene rings, with an extended p-conjugated system, which was recently synthesized for use in an FET by our group. The FET characteristics of an [8]phenacene single-crystal FET with SiO2 gate dielectrics show typical p-channel properties with an average field-effect mobility, &lt;mu &gt;, as high as 3(2) cm(2) V-1 s(-1) in two-terminal measurement mode, which is a relatively high value for a p-channel single-crystal FET. The hmi was determined to be 6(2) cm(2) V-1 s(-1) in four-terminal measurement mode. Low-voltage operation was achieved with PbZr0.52Ti0.48O3 (PZT) as the gate dielectric, and an electric-double-layer (EDL) capacitor. The &lt;mu &gt; and average values of absolute threshold voltage, &lt;vertical bar V-th vertical bar &gt;, were 1.6(4) cm(2) V-1 s(-1) and 5(1) V, respectively, for PZT, and 4(2) x 10(-1) cm(2) V-1 s(-1) and 2.38(4) V, respectively, for the EDL capacitor; these values were evaluated in two-terminal measurement mode. The inverter circuit was fabricated using [8]phenacene and N, N'-1H, 1H-perfluorobutyldicyanoperylene-carboxydi-imide single-crystal FETs. This is the first logic gate circuit using phenacene molecules. Furthermore, the relationship between mu and the number of benzene rings was clarified based on this study and the previous studies on phenacene single-crystal FETs.

    DOI: 10.1039/c5tc00960j

    Web of Science

    researchmap

  • Efficient Synthetic Photocyclization for Phenacenes Using a Continuous Flow Reactor

    Hideki Okamoto, Takamitsu Takane, Shin Gohda, Yoshihiro Kubozono, Kaori Sato, Minoru Yamaji, Kyosuke Satake

    CHEMISTRY LETTERS   43 ( 7 )   994 - 996   2014年7月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:CHEMICAL SOC JAPAN  

    The continuous flow reaction technique has been applied to the photocyclization of 1,2-diarylethenes, the so-called Mallory reaction, to afford phenacenes in high chemical yields and efficiencies (114-288 mg h(-1)). The present technique will allow us to produce several grams of phenacenes at a time.

    DOI: 10.1246/cl.140182

    Web of Science

    researchmap

  • An Extended Phenacene-type Molecule, [8] Phenacene: Synthesis and Transistor Application

    Hideki Okamoto, Ritsuko Eguchi, Shino Hamao, Hidenori Goto, Kazuma Gotoh, Yusuke Sakai, Masanari Izumi, Yutaka Takaguchi, Shin Gohda, Yoshihiro Kubozono

    SCIENTIFIC REPORTS   4   5330-1-5330-8   2014年6月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:NATURE PUBLISHING GROUP  

    A new phenacene-type molecule, [8] phenacene, which is an extended zigzag chain of coplanar fused benzene rings, has been synthesised for use in an organic field-effect transistor (FET). The molecule consists of a phenacene core of eight benzene rings, which has a lengthy pi-conjugated system. The structure was verified by elemental analysis, solid-state NMR, X-ray diffraction (XRD) pattern, absorption spectrum and photoelectron yield spectroscopy (PYS). This type of molecule is quite interesting, not only as pure chemistry but also for its potential electronics applications. Here we report the physical properties of [8] phenacene and its FET application. An [8] phenacene thin-film FET fabricated with an SiO2 gate dielectric showed clear p-channel characteristics. The highest m achieved in an [8] phenacene thin-film FET with an SiO2 gate dielectric is 1.74 cm(2) V-1 s(-1), demonstrating excellent FET characteristics; the average mu was evaluated as 1.2(3) cm(2) V-1 s(-1). The mu value in the [8] phenacene electric-double-layer FET reached 16.4 cm(2) V-1 s(-1), which is the highest reported in EDL FETs based on phenacene-type molecules; the average m was evaluated as 8(5) cm(2) V-1 s(-1). The mu values recorded in this study show that [8] phenacene is a promising molecule for transistor applications.

    DOI: 10.1038/srep05330

    Web of Science

    researchmap

  • Transistor application of alkyl-substituted picene 査読

    Hideki Okamoto, Shino Hamao, Hidenori Goto, Yusuke Sakai, Masanari Izumi, Shin Gohda, Yoshihiro Kubozono, Ritsuko Eguchi

    SCIENTIFIC REPORTS   4   5408-1-5408-6   2014年5月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:NATURE PUBLISHING GROUP  

    Field-effect transistors (FETs) were fabricated with a thin film of 3,10-ditetradecylpicene, picene-(C14H29)(2), formed using either a thermal deposition or a deposition from solution (solution process). All FETs showed p-channel normally-off characteristics. The field-effect mobility, m, in a picene-(C14H29)(2) thin-film FET with PbZr0.52Ti0.48O3 (PZT) gate dielectric reached similar to 21 cm(2) V-1 s(-1), which is the highest mu value recorded for organic thin-film FETs; the averagem mu value (&lt;mu &gt;) evaluated from twelve FET devices was 14(4) cm(2)V(-1) s(-1). The, m. values for picene-(C14H29)(2) thin- film FETs with other gate dielectrics such as SiO2, Ta2O5, ZrO2 and HfO2 were greater than 5 cm(2) V-1 s(-1), and the lowest absolute threshold voltage, vertical bar V-th vertical bar, (5.2 V) was recorded with a PZT gate dielectric; the average jVthj for PZT gate dielectric is 7(1) V. The solution-processed picene-(C14H29)(2) FET was also fabricated with an SiO2 gate dielectric, yielding mu = 3.4 x 10(-2) cm(2) V-1 s(-1). These results verify the effectiveness of picene-(C14H29)(2) for electronics applications.

    DOI: 10.1038/srep05048

    Web of Science

    researchmap

  • Photochemical synthesis of diphenylphenanthrenes, and the photophysical properties studied by emission and transient absorption measurements 査読

    Minoru Yamaji, Yuuma Hakoda, Ami Horimoto, Hideki Okamoto

    Rapid communications in Photoscience   4   73 - 75   2014年

     詳細を見る

  • S-2 fluorescence from picene vapor

    Takao Itoh, Minoru Yamaji, Hideki Okamoto

    CHEMICAL PHYSICS LETTERS   570   26 - 28   2013年5月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    Fluorescence, fluorescence excitation and absorption spectra of picene have been measured in the vapor phase. It is shown that picene vapor exhibits weak fluorescence from the S-2(pi, pi*) state in addition to strong S-1(pi, pi*) fluorescence. The S-2/S-1 fluorescence yield ratio is evaluated to be approximately 1.3 x 10(-2) following the excitation into the S-3 state. It is shown that the relative S-2 fluorescence quantum yield increases with increasing excitation energy, while the S-1 fluorescence yield is nearly invariant. Mechanism of the appearance of the S-2 fluorescence of picene vapor is discussed. (c) 2013 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.cplett.2013.03.055

    Web of Science

    researchmap

  • Photochemical synthesis and electronic spectra of fulminene ([6]phenacene)

    Hideki Okamoto, Minoru Yamaji, Shin Gohda, Kaori Sato, Hisako Sugino, Kyosuke Satake

    RESEARCH ON CHEMICAL INTERMEDIATES   39 ( 1 )   147 - 159   2013年1月

     詳細を見る

    記述言語:英語   出版者・発行元:SPRINGER  

    Facile synthesis of fulminene ([6]phenacene) was achieved through the Mallory reaction of 1-(1-naphthyl)-2-(1-phenanthryl)ethene or the 9-fluorenone-sensitized photo-ring-closure of 1-(1-naphthyl)-2-(1-phenanthryl)ethane. The electronic spectral properties of fulminene were investigated for the first time using photoluminescence as well as transient absorption spectroscopy. The spectral features were compared with those of a series of lower phenacene homologs such as phenanthrene ([3]phenacene), chrysene ([4]phenacene), and picene ([5]phenacene). For the [n]phenacene series, both the fluorescence and phosphorescence bands linearly red-shifted with an increase in the number of the benzene rings (n). Trends in the energy levels of the excited singlet (E (S)) and the triplet (E (T)) states were expressed as E (s) = -2.6n + 89.1 (kcal mol(-1)) and E (T) = -1.8n + 66.2 (kcal mol(-1)), respectively. In the case of fulminene, laser flash photolysis displayed a transient spectrum with an absorption maximum (lambda (max) (T-T) ) at 675 nm, which was assigned as the triplet fulminene excited state. The lambda (max) (T-T) values for the [n]phenacene series showed a linear correlation as a function of the ring number n, given by an equation, lambda (max) (T-T) = 60n + 318 (nm).

    DOI: 10.1007/s11164-012-0639-1

    Web of Science

    researchmap

  • Fabrication of high performance/highly functional field-effect transistor devices based on [6]phenacene thin films

    Ritsuko Eguchi, Xuexia He, Shino Hamao, Hidenori Goto, Hideki Okamoto, Shin Gohda, Kaori Sato, Yoshihiro Kubozono

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   15 ( 47 )   20611 - 20617   2013年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    Field-effect transistors (FETs) based on [6]phenacene thin films were fabricated with SiO2 and parylene gate dielectrics. These FET devices exhibit field-effect mobility in the saturation regime as high as 7.4 cm(2) V-1 s(-1), which is one of the highest reported values for organic thin-film FETs. The two- and four-probe mobilities in the linear regime display nearly similar values, suggesting negligible contact resistance at 300 K. FET characteristics were investigated using two-probe and four-probe measurement modes at 50-300 K. The two-probe mobility of the saturation regime can be explained by the multiple shallow trap and release model, while the intrinsic mobility obtained by the four-probe measurement in the linear regime is better explained by the phenomenon of transport with charge carrier scattering at low temperatures. The FET device fabricated with a parylene gate dielectric on polyethylene terephthalate possesses both transparency and flexibility, implying feasibility of practical application of [6] phenacene FETs in flexible/transparent electronics. N-channel FET characteristics were also achieved in the [6] phenacene thin-film FETs using metals that possess a small work function for use as source/drain electrodes.

    DOI: 10.1039/c3cp53598c

    Web of Science

    researchmap

  • Characteristics of [6]phenacene thin film field-effect transistor 査読

    Noriko Komura, Hidenori Goto, Xuexia He, Hiroki Mitamura, Ritsuko Eguchi, Yumiko Kaji, Hideki Okamoto, Yasuyuki Sugawara, Shin Gohda, Kaori Sato, Yoshihiro Kubozono

    APPLIED PHYSICS LETTERS   101 ( 8 )   2012年8月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER INST PHYSICS  

    Transistor characteristics are studied for field-effect transistors (FETs) with thin films of [6]phenacene, which has six benzene rings and W-shape structure. The molecular alignment preferable for FET transport is found to be formed in [6]phenacene thin films. The transistor shows clear p-channel FET characteristics with field-effect mobility mu as high as 3.7 cm(2) V-1 s(-1). The similar O-2 sensing properties to picene FET are observed in [6]phenacene thin film FET. The bias stress properties are observed in [6]phenacene thin film FET. The pulse-voltage application suppresses the bias-stress effect and it enables a continuous O-2 sensing in [6]phenacene FET. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4747201]

    DOI: 10.1063/1.4747201

    Web of Science

    researchmap

  • Unprecedented Temperature-dependent Formation of 3-and 7-Methyl-3H-azepine Derivatives by the Reaction of o-Nitrotoluene with Tributylphosphine in Nucleophilic Media

    Siti Mariyah Ulfa, Hideki Okamoto, Kyosuke Satake

    CHEMISTRY LETTERS   41 ( 4 )   400 - 402   2012年4月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:CHEMICAL SOC JAPAN  

    The reaction of o-methylphenylnitrene in the presence of alcohol and amine was expected to give isomeric pairs of 3- and 7-methyl-3H-azepine derivatives. The formation ratio between these isomers was found to be obviously influenced by reaction temperature, that is, reaction at 150 degrees C gave 7-methyl-3H-azepine derivative, however, it became minor under 70 degrees C in both media. The ratio between 3- and 7-methyl derivatives is explained by a scheme of kinetic- and thermodynamic-controlled product distribution from o-methylphenylnitrene to 3- and 7-methyldehydroazepine intermediates which are trapped by nucleophilic media to give 3- and 7-methyl-3H-azepine derivatives.

    DOI: 10.1246/cl.2012.400

    Web of Science

    researchmap

  • Studies on interactions of excited cadmium and mercury atoms with secondary and tertiary alkyl- and silylamines in gas phase

    Shunzo Yamamoto, Eriko Kainaga, Omar Ahmed, Hideki Okamoto, Yoshimi Sueishi

    JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY   228 ( 1 )   38 - 43   2012年1月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE SA  

    The Cd(P-3(1))- and Hg(P-3(1))-photosensitized emissions of some secondary and tertiary alkyl- and silylamines have been investigated under conditions of steady illumination at 493 and 298 K, respectively. The emission bands were observed at around 440 nm in the cadmium-photosensitized reactions of these amines. In contrast, no appreciable emission bands were observed in the mercury-photosensitized reactions of these amines. However, upon addition of tert-butyl alcohol to the amine-mercury system, an emission band evolved at around 350 nm in the mercury-photosensitization. The peak-wavelengths for secondary and tertiary alkyl- and silylamines are slightly shorter than the values predicted from the correlations between the peak wavelength and the first ionization energy obtained in the cadmium- and mercury-photosensitized luminescence of ammonia and primary amines. The quenching efficiencies of the cadmium and mercury resonance lines by secondary alkyl- and silylamines are higher than those by tertiary alkyl- and silylamines. These observations suggest that the steric hindrance by the alkyl and silyl groups to the approach of the nitrogen atom in the amines to excited cadmium and mercury atoms seems to be an important factor for the stabilization of the exciplexes and the quenching of the resonance lines. The behavior of silylamines is similar to that of alkylamines in cadmium- and mercury-photosensitized reactions. (C) 2011 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.jphotochem.2011.11.010

    Web of Science

    researchmap

  • Fluorescence response of 3-trifluoroacetylaminophthalimide to Li+–I− ion pair induced by 254 nm photolysis in acetonitrile

    Chem. Commun.   48 ( 17 )   2346 - 2348   2012年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1039/c2cc17502a

    Web of Science

    researchmap

  • STERIC EFFECT ON THE FORMATION OF 3H-AZEPINE DERIVATIVES FROM o-ALKYLPHENYLNITRENE AND ALCOHOL AS A NUCLEOPHILIC MEDIA

    Siti Mariyah Ulfa, Hideki Okamoto, Kyosuke Satake

    HETEROCYCLES   83 ( 6 )   1259 - 1265   2011年6月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD  

    The cause of regioselectivity for the formation of 3-alkyl- and/or 7-alkyl-3H-azepine derivatives via the intramolecular insertion reaction of o-alkylphenylnitrene, which is generated by an action of Buy on o-alkylnitrobenzene, in the presence of alcohol found to be elucidated by the steric effects of an alcohol adduct on the dehydroazepine intermediate. Observed selectivity is confirmed both by changing the bulkiness of the o-alkyl group of phenylnitrene and that of alcohol as a nucleophile.

    DOI: 10.3987/COM-11-12172

    Web of Science

    researchmap

  • Facile Synthesis of Picene from 1,2-Di(1-naphthyl)ethane by 9-Fluorenone-Sensitized Photolysis

    Hideki Okamoto, Minoru Yamaji, Shin Gohda, Yoshihiro Kubozono, Noriko Komura, Kaori Sato, Hisako Sugino, Kyosuke Satake

    ORGANIC LETTERS   13 ( 10 )   2758 - 2761   2011年5月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    A facile formation of picene was achieved by photosensitization of 1,2-di(1-naphthyl)ethane using 9-fluorenone as a sensitizer. This sensitized photoreaction is the first photochemical cyclization of ethylene-bridged naphthalene moieties to afford the picene skeleton. 5,8-Dibromopicene, prepared by this procedure using 1,2-di[1-(4-bromonaphthyl)]ethane as the substrate, was readily converted to novel functionalized picenes by conventional substitution and cross-coupling reactions.

    DOI: 10.1021/ol200874q

    Web of Science

    researchmap

  • Phthalide-derived novel fluoroionophores incorporating picolylamino receptors: synthesis and response to metal cations 査読

    Hideki Okamoto, Ayako Matsui, Kyosuke Satake

    ANALYST   136 ( 15 )   3164 - 3169   2011年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    Phthalide derivatives incorporating mono- and di-picolylamino functionalities at the 6-position have been prepared as novel fluoroionophores and their fluorescence responses to metal cations have been investigated. These phthalides not only exhibited efficient fluorescence in an aqueous medium but also displayed fluorescence on-off response upon addition of transition-metal cations, namely Cu(2+). The 6-aminophthalide fluorophore served as the core of the fluorescent probes although it has rarely been applied to a chemosensor. To the best of our knowledge, these modified phthalides are the first 6-aminophthalide-derived fluorometric probes for metal cations, namely Cu(2+).

    DOI: 10.1039/c1an15239d

    Web of Science

    researchmap

  • Metal-intercalated aromatic hydrocarbons: a new class of carbon-based superconductors 査読

    Yoshihiro Kubozono, Hiroki Mitamura, Xuesong Lee, Xuexia He, Yusuke Yamanari, Yosuke Takahashi, Yuta Suzuki, Yumiko Kaji, Ritsuko Eguchi, Koki Akaike, Takashi Kambe, Hideki Okamoto, Akihiko Fujiwara, Takashi Kato, Taichi Kosugi, Hideo Aoki

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   13 ( 37 )   16476 - 16493   2011年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    New carbon-based superconductors are synthesized by intercalating metal atoms into the solid-phase hydrocarbons picene and coronene. The highest reported superconducting transition temperature, T-c, of a hydrocarbon superconductor is 18 K for K(3)picene. The physics and chemistry of the hydrocarbon superconductors are extensively described for Axpicene (A: alkali and alkali earth-metal atoms) for x = 0-5. The theoretical picture of their electronic structure is also reviewed. Future prospects for hydrocarbon superconductors are discussed from the viewpoint of combining electronics with condensed-matter physics: modification of the physical properties of hydrocarbon solids is explored by building them into a field-effect transistor. The features of other carbon-based superconductors are compared to clarify the nature of hydrocarbon superconductors.

    DOI: 10.1039/c1cp20961b

    Web of Science

    researchmap

  • Quantitative analysis of O-2 gas sensing characteristics of picene thin film field-effect transistors

    Xuesong Lee, Yasuyuki Sugawara, Akio Ito, Shuhei Oikawa, Naoko Kawasaki, Yumiko Kaji, Ryoji Mitsuhashi, Hideki Okamoto, Akihiko Fujiwara, Kenji Omote, Takashi Kambe, Naoshi Ikeda, Yoshihiro Kubozono

    ORGANIC ELECTRONICS   11 ( 8 )   1394 - 1398   2010年8月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    O-2 gas sensing behaviors are studied in picene thin film field-effect transistors (FETs) with hydrophobic polymer (Cytop(TM) or polystyrene) coated SiO2 gate dielectrics. Picene thin film FETs show a rapid reduction of hysteresis in transfer curves recorded in forward and reverse measurement modes, compared to a picene FET with hexamethydisilazane-coated SiO2. The picene FETs show very sensitive O-2 gas sensing effects down to similar to 10 ppm. A quantitative analysis is presented of the gate voltage (V-G) dependent mobility induced by O-2 exposure, i.e., the suppression of drain current at high V-G. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.orgel.2010.06.003

    Web of Science

    researchmap

  • Superconductivity in alkali-metal-doped picene

    Ryoji Mitsuhashi, Yuta Suzuki, Yusuke Yamanari, Hiroki Mitamura, Takashi Kambe, Naoshi Ikeda, Hideki Okamoto, Akihiko Fujiwara, Minoru Yamaji, Naoko Kawasaki, Yutaka Maniwa, Yoshihiro Kubozono

    NATURE   464 ( 7285 )   76 - 79   2010年3月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:NATURE PUBLISHING GROUP  

    Efforts to identify and develop new superconducting materials continue apace, motivated by both fundamental science and the prospects for application. For example, several new superconducting material systems have been developed in the recent past, including calcium-intercalated graphite compounds(1), boron-doped diamond(2) and-most prominently-iron arsenides such as LaO(1-x)F(x)FeAs (ref. 3). In the case of organic superconductors, however, no new material system with a high superconducting transition temperature (T(c)) has been discovered in the past decade. Here we report that intercalating an alkali metal into picene, a wide-bandgap semiconducting solid hydrocarbon, produces metallic behaviour and superconductivity. Solid potassium-intercalated picene (K(x)picene) shows T(c) values of 7K and 18 K, depending on the metal content. The drop of magnetization in Kxpicene solids at the transition temperature is sharp (&lt;2 K), similar to the behaviour of Ca-intercalated graphite(1). The Tc of 18K is comparable to that of K-intercalated C(60) (ref. 4). This discovery of superconductivity in K(x)picene shows that organic hydrocarbons are promising candidates for improved T(c) values.

    DOI: 10.1038/nature08859

    Web of Science

    researchmap

  • Flexible picene thin film field-effect transistors with parylene gate dielectric and their physical properties

    Naoko Kawasaki, Wolfgang L. Kalb, Thomas Mathis, Yumiko Kaji, Ryoji Mitsuhashi, Hideki Okamoto, Yasuyuki Sugawara, Akihiko Fujiwara, Yoshihiro Kubozono, Bertram Batlogg

    APPLIED PHYSICS LETTERS   96 ( 11 )   113305   2010年3月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER INST PHYSICS  

    Flexible picene thin film field-effect transistors (FETs) have been fabricated with parylene gate dielectric on polyethylene terephthalate substrates. The picene thin film FETs show p-channel output/transfer characteristics and the field-effect mobility mu reaches similar to 1 cm(2) V(-1) s(-1) in vacuum. The FET shows a clear O(2) gas sensing effect and negligible hysteresis in the transfer curves, indicating a possible application of the transistor as O(2) selective gas sensor. Furthermore, it has been found that the parylene gate dielectric can eliminate a reduction in on-state drain current caused by continuous bias-voltage application which is observed if a SiO(2) gate dielectric is used.

    DOI: 10.1063/1.3360223

    Web of Science

    researchmap

  • Linear response of multiphoton reaction: Three-photon Cycloreversion of anthracene biplanemer in solution by intense femtosecond laser pulses

    Yatsuhashi, T., Nakahagi, Y., Okamoto, H., Nakashima, N.

    Journal of Physical Chemistry A   114 ( 39 )   10475 - 10480   2010年

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/jp1041475

    Scopus

    researchmap

  • Low voltage operation in picene thin film field-effect transistor and its physical characteristics

    Yumiko Kaji, Naoko Kawasaki, Xuesong Lee, Hideki Okamoto, Yasuyuki Sugawara, Shohei Oikawa, Akio Ito, Hiroyuki Okazaki, Takayoshi Yokoya, Akihiko Fujiwara, Yoshihiro Kubozono

    APPLIED PHYSICS LETTERS   95 ( 18 )   183302/1-183302/3   2009年11月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER INST PHYSICS  

    Low voltage operation of picene thin film field-effect transistor (FET) has been realized with 40 nm thick SiO(2) gate dielectrics coated by two polymers, Cytop (TM) and polystyrene. The picene FETs operated in low absolute gate voltage vertical bar V(G)vertical bar below 15 V for Cytop (TM) coated SiO(2) and 30 V for polystyrene coated SiO(2) gate dielectrics, and they showed a significant O(2) gas sensing effect down to similar to 10 ppm. Photoemission spectrum clarified that O(2) molecules penetrate into the thin films at O(2)/picene mole ratio of 1: 1. X-ray diffraction pattern of picene thin films showed highly oriented growth on the polymer-coated SiO(2).

    DOI: 10.1063/1.3257373

    Web of Science

    researchmap

  • High-performance C-60 and picene thin film field-effect transistors with conducting polymer electrodes in bottom contact structure

    Yumiko Kaji, Ryoji Mitsuhashi, Xuesong Lee, Hideki Okamoto, Takashi Kambe, Naoshi Ikeda, Akihiko Fujiwara, Minoru Yamaji, Kenji Omote, Yoshihiro Kubozono

    ORGANIC ELECTRONICS   10 ( 3 )   432 - 436   2009年5月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    C-60 and picene thin film field-effect transistors (FETs) in bottom contact structure have been fabricated with poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PED-OT:PSS) electrodes for a realization of mechanical flexible organic FETs. The C-60 thin film FETs showed n-channel enhancement-type characteristics with the field-effect mobility mu value of 0.41 cm(2\) V-1 s(-1), while the picene thin film FET showed p-channel enhancement-type characteristics with the p of 0.61 cm(2) V-1 s(-1). The p values recorded for C-60 and picene thin film FETs are comparable to those for C-60 and picene thin film FETs with Au electrodes. (C) 2009 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.orgel.2009.01.006

    Web of Science

    researchmap

  • Trap states and transport characteristics in picene thin film field-effect transistor

    Naoko Kawasaki, Yoshihiro Kubozono, Hideki Okamoto, Akihiko Fujiwara, Minoru Yamaji

    APPLIED PHYSICS LETTERS   94 ( 4 )   043310/1-043310/3   2009年1月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER INST PHYSICS  

    Transport characteristics and trap states are investigated in picene thin film field-effect transistor under O(2) atmosphere on the basis of multiple shallow trap and release (MTR) model. The channel transport is dominated by MTR below 300 K. It has been clarified on the basis of MTR model that the O(2)-exposure induces a drastic reduction in shallow trap density to increase both the field-effect mobility mu and on-off ratio. We also found that the O(2)-exposure never caused an increase in hole carrier density. Actually, a very high mu value of 3.2 cm(2) V(-1) s(-1) is realized under 500 Torr of O(2).

    DOI: 10.1063/1.3076124

    Web of Science

    researchmap

  • Photochemistry of nitrogen-bridged cyclophanes: 2,11-Diaza[3 2]anthracenoparacyclophane and 2,11-diaza[32] paracyclophane systems 査読

    Hideki Okamoto, Minoru Yamaji, Kyosuke Satake

    Synlett   ( 13 )   1931 - 1945   2008年8月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    This account provides an overview of the photochemical properties of cyclophanes possessing nitrogen atoms in the bridge chains, namely 2,11-diaza[32]anthracenoparacyclophane and 2,11-diaza[3 2]paracyclophane systems. Although the photoreactions of aromatic molecules that are bound by a linker or fixed in a cyclophane structure have been widely investigated, much less attention has been paid to the photochemistry of aromatic rings incorporated in a nitrogen-bridged cyclophane. During the course of our work on the photoreactions of cyclophanes possessing nitrogen atoms in their bridge chains, the nitrogen-bridged cyclophanes were found to display photoproperties significantly different from those of the nonbridged aromatic chromophores or the corresponding carbonbridged cyclophane analogues. The 2,11-diaza[32]anthracenoparacyclophane system displayed an efficient photochemical cycloaddition-adiabatic cycloreversion cycle in the excited singlet state, while in the triplet state, the photoisomer underwent a novel rearrangement and adiabatic cycloreversion. Upon photolysis of the 2,11-diaza[32]paracyclophane system, an octahedrane cage was formed. This is the first reported octahedrane formation to occur by the photochemical dimerization of benzene. Thus, the title cyclophane systems display a variety of photoprocesses involving cycloaddition, adiabatic cycloreversion accompanied by photoinduced chemiluminescence, novel rearrangements, and previously unknown benzene dimerization. 1 Introduction 2 Photochemistry of the 2,11-Diaza[32]anthracenoparacyclophane System 2.1 General Comments on the Photochemical Cycloaddition and Cycloreversion of Aromatic Molecules in the Singlet State 2.2 Intramolecular Photochemical Cycloaddition and Cycloreversion of the 2,11-Diaza[32] anthracenoparacyclophane System 2.3 General Introduction to the Photochemistry of Aromatic Molecules in the Triplet State 2.4 Photoproperties of the 2,11-Diaza[32]anthracenoparacyclo-phane System in the Triplet State 3 Photochemistry of the 2,11-Diaza[32]paracyclophane System 3.1 General Remarks on the Photoreactions of Cyclophanes Containing Two Benzene Rings 3.2 Construction of the 2,11-Diaza[32]paracyclophane Skeleton 3.3 Photoreactions of the 2,11-Diaza[32]paracyclophane System 4 Summary.

    DOI: 10.1055/S-2008-1078574

    Web of Science

    Scopus

    researchmap

  • Air-assisted high-performance field-effect transistor with thin films of picene

    Hideki Okamoto, Naoko Kawasaki, Yumiko Kaji, Yoshihiro Kubozono, Akihiko Fujiwara, Minoru Yamaji

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   130 ( 32 )   10470 - +   2008年8月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    A field-effect transistor (FET) with thin films of picene has been fabricated on SiO(2) gate dielectric. The FET showed p-channel enhancement-type FET characteristics with the field-effect mobility, mu, of 1.1 cm(2) V(-1) s(-1) and the on-off ratio of &gt;10(5). This excellent device performance was realized under atmospheric conditions. The p increased with an increase in temperature, and the FET performance was improved by exposure to air or O(2) for a long time. This result implies that this device is an air (O(2))-assisted FET. The FET characteristics are discussed on the basis of structural topography and the energy diagram of picene thin films.

    DOI: 10.1021/ja803291a

    Web of Science

    researchmap

  • Fluorescence response of a 4-trifluoroacetylaminophthalimide to iodide ions upon 254 nm irradiation in MeCN

    Hideki Okamoto, Hiroyuki Konishi, Mami Kohno, Kyosuke Satake

    ORGANIC LETTERS   10 ( 14 )   3125 - 3128   2008年7月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    The title trifluoroacetylaminophthalimide derivative produced a violet fluorescence (lambda(FL)(max) 392 nm) in MeCN, and it displayed a green emission (lambda(FL)(max) 506 nm) after irradiation at 254 nm in the presence of iodide ions. The corresponding amidate ion of the trifluoroacetamide was identified as the green fluorescence emitter. The deprotonation reaction may be caused by proton-abstracting solvated electrons generated by a photochemical charge-transfer-to-solvent process from I(-) to MeCN.

    DOI: 10.1021/ol801184x

    Web of Science

    researchmap

  • A convenient synthesis of trifluoroacetamide derivatives of diaza[3(2)]cyclophanes and triaza[3(3)]cyclophanes

    Hideki Okamoto, Hiroyuki Takemura, Kyosuke Satake

    SYNTHESIS-STUTTGART   44 ( 1 )   39 - 44   2008年1月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:GEORG THIEME VERLAG KG  

    The diaza[3(2)]cyclophane skeleton has been constructed by the bis-N-alkylation of 1,4-bis[(4-nitrophenylsulfonylamin o)methyl] benzene with 1,4-bis(halomethyl)benzene in the presence of sodium hydride. The 4-nitrophenylsulfonyl (Ns) amides in the bridge chains of the cyclophane were effectively deprotected by sodium ethanethiolate and the resulting free amine moieties were reprotected as the trifluoroacetamide under mild conditions to afford 3,7-bis(trifluoroacetyl)-3,7-diaza-1,5(1,4)-dibenzenacyclooctaphane in 26% overall yield. This Ns-amide method has also been applied for the preparation of a higher homologue, the trifluoroacetamide derivative of triaza[3(3)]cyclophane, 3,5,7-tris(trifluoroacetyl)-3,7, 10-triaza- 1,5(1,3,5)-dibenzenabicyclo[3.3.3]undecaphane, in 18% overall yield. Thus, the present procedure provides a convenient synthetic route to azacyclophane derivatives possessing trifluoroacetamide groups in the bridge chains.

    DOI: 10.1055/s-2007-1000825

    Web of Science

    researchmap

  • Fluorescence properties of 3-and 4-trifluoroacetylamino-1,8-naphthalimides: Solvent-controlled switching of fluorescence color and response to metal-cations

    Hideki Okamoto, Kyosuke Satake, Masaru Kimura

    ARKIVOC   8   112 - 123   2007年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ARKAT USA INC  

    The effects of solvents and metal cations on the fluorescence spectra of 3- ( 1) and 4- ( 2) trifluoroacetylamino-1,8-naphthalimides were investigated. In MeCN, these naphthalimides displayed a violet similar to blue fluorescence based on their neutral amide form ( 1, 2). Whereas in DMSO, they gave off a yellow similar to orange emission due to their amide anions (1(-), 2(-)). In MeOH, naphthalimide 2 emitted a dual fluorescence (lambda(FL) 436 and 556 nm) to display a white luminescence. Naphthalimides 1, 2 are essentially insensitive to metal cations in their neutral amide form. In contrast, the fluorescence of the amide anions 1-, 2- was quenched by metal cations. The efficiency of the quenching correlated with the Lewis acidity of the metal cations; a stronger Lewis acid tended to display a more effective fluorescence quenching. Therefore, the fluorescence color and the sensitivity to metal cations of the naphthalimides were effectively switched by the solvent.

    Web of Science

    researchmap

  • Photoreaction of a 2,11-diaza[3.3]paracyclophane derivative: Formation of octahedrane by photochemical dimerization of benzene

    Hideki Okamoto, Kyosuke Satake, Hiroyuki Ishida, Masaru Kimura

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   128 ( 51 )   16508 - 16509   2006年12月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    DOI: 10.1021/ja067350r

    Web of Science

    researchmap

  • Novel parallel reaction between a [1,5] sigmatropic alkylthio shift and a [1,5] sigmatropic hydrogen shift observed in a 2H-azepine ring

    Yasuhiro Kubota, Kyosuke Satake, Hideki Okamoto, Masaru Kimura

    ORGANIC LETTERS   8 ( 24 )   5469 - 5472   2006年11月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    Although heating 2-methoxy-2H-azepine results in a [1,5] sigmatropic hydrogen shift, heating 2-propylthio-2H-azepine results in not only a [1,5] sigmatropic hydrogen shift but also a [1,5] sigmatropic propylthio shift. Kinetic measurements reveal that migratory aptitudes increase in the order of MeO &lt; H, PrS. These [1,5] sigmatropic shifts are discussed on the basis of ab initio DFT calculations.

    DOI: 10.1021/ol062131w

    Web of Science

    researchmap

  • Invariom structure refinement, electrostatic potential and toxicity of 4-O-methylalpinumisoflavone, O,O-dimethylalpinumisoflavone and 5-O-methyl-4-O-(3-methylbut-2-en-1-yl)alpinum-isoflavone

    Robert Kingsford-Adaboh, Birger Dittrich, Christian B. Huebschle, Winfred S. K. Gbewonyo, Hideki Okamoto, Masaro Kimura, Hiroyuki Ishida

    ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE   62   843 - 849   2006年10月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:BLACKWELL PUBLISHING  

    The accurate X-ray single-crystal structures of the isoflavone compounds 4-O-methylalpinumisoflavone, O, O-dimethylalpinumisoflavone and 5-O-methyl-4-O-( 3-methylbut-2-en-1-yl) alpinumisoflavone {alpinumisoflavone = 5-hydroxy7-( 4-hydroxyphenyl)-2,2-dimethyl-2H, 6H-benzo[ 1,2-b: 5,4-b']dipyran-6-one} from data sets measured at cryogenic temperature have been obtained from invariom modelling using theoretically predicted Hansen and Coppens multipole-model form factors, which describe the aspherical electron density distribution. Molecular dipole moments and electrostatic potentials obtained from invariom modelling are discussed and compared with results from ab initio theoretical calculations. All three studied compounds are solvent extracts of root bark or seed powder of Millettia thonningii ( leguminosae), a plant molluscicide and cercaricide used in Franco West Africa as medication against various diseases. The compounds' toxicities to brine shrimp have been determined and their different potencies tentatively related to conformation differences, intramolecular contacts, dipole moments and electrostatic potential features.

    DOI: 10.1107/S0108768106019616

    Web of Science

    researchmap

  • Formation of 4H-azepine by the electrophilic reaction of a 2-methoxyazepinium ion and analysis of the sigmatropic isomerization

    Christopher E. J. Cordonier, Kyosuke Satake, Hideki Okamoto, Masaru Kimura

    EUROPEAN JOURNAL OF ORGANIC CHEMISTRY   ( 17 )   3803 - 3807   2006年8月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-V C H VERLAG GMBH  

    2-Aryl-2H-, 3-aryl-3H-, and 4-aryl-4H-azepine were formed by the novel, electrophilic, pi(LUMO)-controlled reaction of the 2-methoxyazepinium ion, generated in situ by the reaction of TiCl4 with 2,7-dialkoxy-2H-azepine and an aryl compound, for which the kinetic parameters of the sigmatropic hydrogen rearrangement of the 4H-azepine was measured. The substitution and hydrogen shift of the azepinium ion were analyzed with DFT studies. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006).

    DOI: 10.1002/ejoc.200600257

    Web of Science

    researchmap

  • Crystal structure of 4ユ-O-methylalpinumisoflavone at 90K

    Robert Kingsford-Adaboh, E. Ahiano, Birger Dittrich, Hideki Okamoto, Masaru Kimura, Hiroyuki Ishida

    Cryst. Res. Technol   41 ( 7 )   728 - 733   2006年7月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1002/crat.200510656

    Web of Science

    researchmap

  • An azacrowned phthalimide as a metal-ion sensitive and solvatofluorochromic fluorophore: Fluorescence properties and a mimic integrated logic operation

    H Okamoto, M Kohno, K Satake, M Kimura

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   78 ( 12 )   2180 - 2187   2005年12月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:CHEMICAL SOC JAPAN  

    The novel azacrowned phthalimide 1 has been prepared and its fluorescence properties have been investigated by addition of EtOH and Ag+. The phthalimide 1 showed appreciable solvatofluorochromism; its fluorescence maxima (lambda(FL)) appeared in the wavelength region between 458 (in Et2O) and 544 nm (in EtOH). In benzene, the phthalimide 1 gave off blue emission (lambda(FL) 466 nm) while it emitted green fluorescence (lambda(FL) 497 nm) upon addition of 250 mM of EtOH. Both the blue and the green emissions were quenched by Ag+. Potential logic operations of the phthalimide 1 were examined using fluorescence outputs at 450 (Out(1)) and 515 nm (Out(2)) and two input stimuli, EtOH (In,) and Ag+ (In-2). The Out, was on in the absence of these inputs while its intensity was reduced (off) by either or both of the inputs to serve as a NOR operator. The Out(2) was off without the inputs; in contrast, the intensity of Out(2) was enhanced (on) by In-2. The enhanced Out(2) was switched off by In-2. The Obt(2), thus, corresponds to an INHIBIT operation responding to the input signals. The crowned phthalimide 1 mimics a two-input-two-output combinational logic gate with a single fluorophore and a single ion-sensing unit.

    DOI: 10.1246/bcsj.78.2180

    Web of Science

    researchmap

  • Electrophilic behavior of the pi delocalized azepinium ion: Friedel-crafts reactions with benzenes and five-membered aromatic heterocycles 招待

    Y Kubota, K Satake, H Okamoto, M Kimura

    ORGANIC LETTERS   7 ( 23 )   5215 - 5218   2005年11月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    Although the reactivity of tropylium ion with aromatic substrates is low, the reaction of azepinium ion with aromatic substrates such as benzene, phenol, furan, and thiophene resulted in the formation of 2-aryl-2H-azepine as a major product. An exceptional result in the formation of ring-contracted product was observed in the reaction with pyrrole.

    DOI: 10.1021/ol052049l

    Web of Science

    researchmap

  • Preparation of an azacrowned isoluminol and its chemiluminescence initiated by alkali-metal iodides in acetonitrile 査読

    H Okamoto, M Kimura

    CHEMISTRY LETTERS   34 ( 10 )   1452 - 1453   2005年10月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:CHEMICAL SOC JAPAN  

    The novel azacrowned isoluminol has been prepared as the first luminol analogue possessing an azacrown ionophore. The crowned isoluminol displayed flash chemiluminescence upon addition of alkali-metal iodides in acetonitrile containing alkaline hydrogen peroxide and the chemiluminescence intensity varied depending on the metal cations studied; K+ &gt;&gt; Na+ &gt; Li+.

    DOI: 10.1246/cl.2005.1452

    Web of Science

    researchmap

  • Reaction of 2-methoxy-3H-azepine with NBS: Efficient synthesis of 2-substituted 2H-azepines

    CEJ Cordonier, K Satake, M Atarashi, Y Kawamoto, H Okamoto, M Kimura

    JOURNAL OF ORGANIC CHEMISTRY   70 ( 9 )   3425 - 3436   2005年4月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    The reaction of 2-methoxy-3H-azepines, in the presence or absence of a nucleophile, with N-bromosuccinimide (NBS) gave a regioselective 1,4-adduct from which the corresponding 2H-azepine derivatives were formed via base-promoted hydrogen bromide elimination, generally in moderate to quantitative yield. Competitive formation of 4-bromo-2-methoxy-3H-azepine by electrophilic substitutuion or 3H-azepin-2-yl 2H-azepin-2-yl ether by transetherification was minimized at lower reaction temperatures. Quantitative substitution of 2-(2',4',6'-trichlorophenoxy)2H-azepine derivatives, formed in moderate yield from the respective 3H-azepine and NBS in the presence of 2,4,6-trichlorophenol (TCP), by various nucleophiles gave the corresponding 2-substituted 2H-azepine. Among these nucleophiles were alkanethiol and alkylamine that are not tolerated in the reaction of 3H-azepine and NBS.

    DOI: 10.1021/jo0500232

    Web of Science

    researchmap

  • Triplet-sensitized photolysis of the photoisomer of a 2,11-diaza[3,3](9,10)anthracenoparacyclophane: An adiabatic cycloreversion and a [2 pi a+2 pi a+2 sigma s] rearrangement in a triplet state of the biplanophane system

    H Okamoto, M Yamaji, K Satake, S Tobita, M Kimura

    JOURNAL OF ORGANIC CHEMISTRY   69 ( 23 )   7860 - 7868   2004年11月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    The triplet-sensitized photoreactions of the title biplanophane system 6, the photoisomer of a 2,11diaza[3,31(9,10)anthracenoparacyclophane derivative 5, were investigated by stationary and laserflash photolyses using xanthone (XT) and benzophenone (BP) as triplet sensitizers. Vaen photoisomer 6 underwent XT-sensitized irradiation, a triplet cyclophane 5 and a novel polycyclic product 7 were obtained via an adiabatic cycloreversion and a formal [2pia + 2 pia + 2sigmas] rearrangement, respectively. The maximum quantum yield for the formation of cyclophane 5 (0.69) and the upper-limit efficiency for the formation of polycycle 7 (0.31) were determined by laser photolysis techniques. For BP-sensitized photolysis of photoisomer 6, oxetane 8, in addition to triplet cyclophane 5 and polycycle 7, was formed by a Paterno-Biichi reaction. The quenching rate constant (k(q)) of triplet BP by photoisomer 6 (3.4 x 10(8) dm(3) Mol(-1) s(-1)) was found to be 1 order of magnitude smaller than that for XT (5.0 x 10(9) dm(3) mol(-1) s(-1)). On the basis of the relationship between k(q) and the triplet donor-acceptor energy gap, the triplet energy level of photoisomer 6 was estimated to be similar to71 kcal mol(-1). The photochemical and the photophysical processes involved in the sensitized photolyses are summarized in an energetic reaction diagram and discussed in detail.

    DOI: 10.1021/jo048757m

    Web of Science

    researchmap

  • Synthesis of a delocalized azepinium ion and investigation of its electrophilic character 招待

    K Satake, Y Kubota, CEJ Cordonier, H Okamoto, M Kimura

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   43 ( 6 )   736 - 738   2004年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-V C H VERLAG GMBH  

    DOI: 10.1002/anie.200352794

    Web of Science

    researchmap

  • Nucleophilic reactions of 5-tert-butyl-2-methoxy-3H-azepine with alkoxides and alkyllithium reagents 査読

    Y Kubota, K Satake, R Ikui, H Okamoto, N Kimura

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   76 ( 4 )   805 - 811   2003年4月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:CHEMICAL SOC JAPAN  

    The reaction of 5-tert-butyl-2-methoxy-3H-azepine (2a) with sodium alkoxides gave 2-alkoxy-3H-azepine derivatives 3-6 by nucleophilic transetherification. The treatment of 2a with tert-butyllithium also yielded 2,5-di-tert-butyl-3H-azepine (7): however, the reaction of 2a and methyllithium gave the expected 5-tert-butyl-2-methyl-3H-azepine (8) along with unexpected 5-tert-butyl-2,2-dimethyl-2,3-dihydro-1H-azepine (9). but also 5,5'-di(tert-butyl)-2,2'-methylenedi(3H-azepine) (11), the structure of which was found to be tautomerized 5-tert-butyl-2-(5-tert-butyl-2,3-dihydro-1H-azepine-2-ylidenemethyl)-3H-azepine (12). The energy profile for the observed tautomerization is discussed based on ab initio DFT calculations and kinetic measurements.

    DOI: 10.1246/bcsj.76.805

    Web of Science

    researchmap

  • Photochemistry of N-isopropoxy-substituted 2(1H)-pyridone and 4-p-tolylthiazole-2(3H)-thione: Alkoxyl-radical release (spin-trapping, EPR, and transient spectroscopy) and its significance in the photooxidative induction of DNA strand breaks 査読

    W Adam, J Hartung, H Okamoto, S Marquardt, WM Nau, U Pischel, CR Saha-Moller, K Spehar

    JOURNAL OF ORGANIC CHEMISTRY   67 ( 17 )   6041 - 6049   2002年8月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    UVA-irradiation of the photo-Fenton reagents N-isopropoxypyridone 2b and N-isopropoxythiazole-2(3H)-thione 3b releases radicals which induce strand breaks. Transient spectroscopy establishes N-O bond scission [Phi(N-O) = (75 8)% for 2b and (65 7)% 3b] as the dominating primary photochemical process to afford the DNA-damaging radicals. Product studies and laser-flash experiments reveal that the thiazolethione 3b leads primarily to the disulfide 5, from which through C-S bond breakage, the bithiazyl 6, the thiazole 7, and the isothiocyanate 8 are derived. Upon irradiation of pyridone 2b (300 nm) in aqueous media, a mixture of isopropoxyl and 2-hydroxyprop-2-yl radicals is formed, as confirmed by trapping with 5,5-dimethyl-1-pyrroline N-oxide (DMPO) and EPR spectroscopy. In contrast, the photolysis of the thiazolethione 3b (350 nm) affords exclusively the DMPO adducts of the isopropoxyl radicals. Control experiments disclose that the thiazolethione-derived photoproduct disulfide 5, or the intermediary thiyl radicals B, scavenge the carbon-centered 2-hydroxyprop-2-yl radicals, which are generated from the isopropoxyl radicals by hydrogen shift. With supercoiled pBR 322 DNA in a 60:40 mixture of H2O-MeCN, the pyridone 2b and the thiazolethione 3b display moderate strand-break activity (17% open-circular DNA for 2b and 12% for 3b). In pure water, however, the pyridone 2b photoinduces substantially more DNA cleavage (32% open-circular DNA), which is attributed to the peroxyl radicals generated from the 2-hydroxyprop-2-yl radicals by oxygen trapping. The lower strand-break activity of the thiazolethione 3b derives presumably from isopropoxyl radicals, because only these are detected in the photolysis of this photo-Fenton reagent.

    DOI: 10.1021/jo025856w

    Web of Science

    researchmap

  • Nucleophilic substitution reaction of 5-t-butyl-2methoxy-3H-azepine with alkoxides and alkyllithium reagents: A formation of bis(5-t-butyl-3H-azepin-2-yl)methane having a vinamidine conjugation 査読

    K Satake, Y Kubota, H Okamoto, M Kimura

    HETEROCYCLES   57 ( 2 )   223 - 228   2002年2月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD  

    Reaction of 5-t-butyl-2-methoxy-3H-azepine (2) with nuclephiles (alkoxides or t-butyllithium) gave respective substitution product at 2-position of the ring. Unexpectedly, when methyllithium was used as a nucleophile, bis(5-t-butyl-3H-azepin-2-yl)methane (7), the structure of which found to be tautomeric vinamidine (7a,b), was formed. Tautomerization between 7 and 7a,b was characterized spectroscopically and theoretically based on the levels of B3LYP/631G(d).

    Web of Science

    researchmap

  • Photochromic properties of a 2,11-diaza[3,3]paracyclo(9,10)anthracenophane derivative having ethylenediamine host function on its bridge chains 査読

    Hideki Okamoto, Yukari Nakatsu, Masaru Kimura, Kyosuke Satake

    ITE Lett. Batter. New Technol. Med.   2002年

     詳細を見る

  • Preparation of a crown-ether-modified lophine peroxide as a guest-sensitive novel chemiluminophore and modulation of its chemiluminescence by metal cations 査読

    H Okamoto, M Owari, M Kimura, K Satake

    TETRAHEDRON LETTERS   42 ( 42 )   7453 - 7455   2001年10月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD  

    A guest-sensitive chemiluminophore, a novel crown-ether-modified lophine peroxide 1. has been prepared. and its chemiluminescent behavior has been investigated in the presence of alkaline and alkaline earth metal cations. In the presence of Na+, the lambda (max) of the chemiluminescence of peroxide 1 was blue-shifted (505 nm) compared to the case without a metal cation (566 nm). The chemiluminescent intensity was enhanced by addition of Na+ while that of Mg2+ decreased the intensity. (C) 2001 Elsevier Science Ltd. All rights reserved.

    DOI: 10.1016/S0040-4039(01)01572-6

    Web of Science

    researchmap

  • N-Hydroxy-4-(4-chlorophenyl)thiazole-2(3H)-thione as a photochemical hydroxyl-radical source: photochemistry and oxidative damage of DNA (strand breaks) and 2’-deoxyguanosine (8-oxodG formation) 査読

    Waldemar Adam, Jens Hartung, Hideki Okamoto, Chantu Saha-M&ouml, ller, Kristina Spehar

    Photochem. Photobiol.   72 ( 5 )   619 - 624   2000年11月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1562/0031-8655(2000)072<0619:NHCTHT>2.0.CO;2

    Web of Science

    researchmap

  • Sensitized irradiation of anthracene-benzene biplanemers: Formation of adducts of a benzvalene or a Dewar benzene with anthracene 査読

    Masaru Kimura, Hideki Okamoto, Zhi Zhi Hu, Setsuo Kashino

    ITE Lett. Batter. New Technol. Med.   2000年

     詳細を見る

  • Circular polarization of photochemiluminescence from the photoisomer of a conformationally fixed 2,11-diaza[3.3](9,10)anthracenoparacyclophane derivative 査読

    Hideki Okamoto, Harry P. J. M. Dekkers, Kyosuke Satake, Masaru Kimura

    Chemical Communications   ( 9 )   1049 - 1050   1998年5月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Royal Society of Chemistry  

    The conformation of 2,11-diaza[3.3](9,10)anthracenoparacyclophane 1, which underwent photointerconversion with isomer 2, was fixed with the aid of a chiral camphanic auxiliary to have molecular chirality, and the photochemiluminescence from the modified 2a was circularly polarized reflecting the chirality of the emitting state.

    DOI: 10.1039/a801296b

    Scopus

    researchmap

  • Adiabatic photocycloreversion of bridged benzene-anthracene biplanemers: Controlling of the efficiency of the excited product formation by auxiliary substituents on the side-chains 査読

    Hideki Okamoto, Kyosuke Satake, Masaru Kimura

    Chemistry Letters   ( 9 )   873 - 874   1997年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Chemical Society of Japan  

    The efficiency for excited product formation in the adiabatic photocycloreversion of bridged biplanemer 1 was controlled by the size of its side-chain substituents which changed the interchromophore distance in the photoproduct 2.

    DOI: 10.1246/cl.1997.873

    Scopus

    researchmap

  • Rearrangement of bicyclo[2.2.2]octa-2,5-diene and bicyclo[3.2.2]nona-6,8-diene under the conditions of bromination 査読

    Kyosuke Satake, Kazuyuki Hikasa, Hajime Itoh, Hideki Okamoto, Masaru Kimura, Shiro Morosawa

    Bulletin of the Chemical Society of Japan   69 ( 2 )   453 - 457   1996年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Chemical Society of Japan  

    A reaction of electrophilic bromination of norbornadiene homologs such as bicyclo[2.2.2]octa-2,5-diene (4) and bicyclo[3.2.2]nona-6,8-diene (7) with bromine gave hitherto unknown skeleton rearranged dibromides. The rearrangement may proceed via a bromonium cation of starting diene to give bicyclo[3.2.1]octene or bicyclo[3.3.1]nonene skeleton in respective cases. The observed rearrangement reactions are also confirmed in 6,7-bis(methoxycarbonyl) derivatives of bicyclodiene 7 under similar conditions.

    DOI: 10.1246/bcsj.69.453

    Scopus

    researchmap

  • A new ring contraction rearrangement of 2,5-and 3,6-di-tert-butyl-3H-azepines to pyridine derivatives 査読

    Kyosuke Satake, Koichi Takaoka, Michiaki Hashimoto, Hideki Okamoto, Masaru Kimura, Shiro Morosawa

    Chemistry Letters   ( 12 )   1129 - 1130   1996年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Chemical Society of Japan  

    A new ring contraction reaction giving pyridine derivatives from 3,6-and 2,5-di-tert-butyl-3H-azepines was observed by a successive treatment with bromine and aqueous K2CD3. A plausible mechanism via azatropilium cation for the rearrangement was discussed based on the product's distribution from respective 3H-azepines.

    DOI: 10.1246/cl.1996.1129

    Scopus

    researchmap

  • Detection and thermal properties of 1,4-Difluorobenzene-naphthoquinone Biplanemer: A new longicyclic π system 査読

    Masaru Kimura, Koji Sirasu, Hideki Okamoto, Kyosuke Satake, Shiro Morosawa

    Tetrahedron Letters   33 ( 46 )   6975 - 6978   1992年11月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    9,10-difluorotetracyclo[6.4.21,8.29,12.02,7]hexadeca-2,4,6,10,13,15-hexaene-3, 6-dione is thermally labile and shows a notably clear, long wave-length CT absorption. © 1992.

    DOI: 10.1016/S0040-4039(00)60910-3

    Scopus

    researchmap

  • Synthesis and characterization of 2H-, 3H- and 4H-azepine: The first observation of the thermal distribution equilibrium of azepines 査読

    Kyosuke Satake, Ryoichi Okuda, Michiaki Hashimoto, Yasushi Fujiwara, Izumi Watadani, Hideki Okamoto, Masaru Kimura, Shiro Morosawa

    Journal of the Chemical Society, Chemical Communications   ( 17 )   1154 - 1156   1991年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Demethoxycarbonylation of methyl 2,5,-di-tert-butyl-1H-azepine-1- carboxylate using 1,8-diazabicyclo[5.4.0]undec-7-ene gives exclusively two isomers of 3H-azepine derivatives, while methyl 3,6-di-tert-butyl-1H-azepine-1- carboxylate gives a mixture of 2H-, 3H- and 4H-azepine derivatives under the same conditions because of a 1,5-hydrogen shift in the resulting triene system.

    DOI: 10.1039/C39910001154

    Scopus

    researchmap

  • A Desirable Route to Heterodimers of 1,4-Dihalobenzenes and Anthracene and Their Photoproperties and Thermal Properties 査読

    Masaru Kimura, Hideki Okamoto, Hisatoshi Kura, Ayumi Okazaki, Eiji Nagayasu, Kyosuke Satake, Shiro Morosawa, Masayoshi Fukazawa, Hamzer Abdel-Halim, D. O. Cowan

    Journal of Organic Chemistry   53 ( 17 )   3908 - 3911   1988年8月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Electronic oxidative bisdecarboxylation of photoadducts of 2,5-dihalo-1,2-dihydrophthalic anhydride and anthracene gave the corresponding energy-rich heterodimers 12 and 13. The quantum yields of the formation of the excited anthracene from 12 and 13 by the irradiation of 280-nm light were 0.65 and 0.25, respectively. We assumed that the heterodimers of 12 and 13 form biradicaloid intermediates during thermal retro [4πs + 4πs] cycloaddition and consumed their stored energy without any visible light. However, we observed emission light from 340 to 460 nm through a glass filter and the formation of anthracene using Nd-YAG laser IR light (1.06 μm) by the multiphoton absorption, when fine powders of 12 and 13 were used. © 1988, American Chemical Society. All rights reserved.

    DOI: 10.1021/jo00252a004

    Scopus

    researchmap

  • Synthesis and photochemistry of 3, 6-difluoro-10,11-benzopentacyclo-[6,4,0.0&lt;sup&gt;2.7&lt;/sup&gt;,0&lt;sup&gt;3.12&lt;/sup&gt;.0&lt;sup&gt;6.9&lt;/sup&gt;]dodeca-4,10-diene 査読

    Masaru Kimura, Hisatoshi Kura, Kastumi Nukada, Hideki Okamoto, Kyosuke Satake, Shiro Morosawa

    Journal of the Chemical Society, Perkin Transactions 1   ( 12 )   3307 - 3310   1988年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    9,12-Difluoro-and 9,12-dichlorotetracyclo[6.4.2.2&lt
    sup&gt
    9.12&lt
    /sup&gt
    .0&lt
    sup&gt
    2.7&lt
    /sup&gt
    ] hexadeca-2,4,6,13,15-pentaene-10,11 -dicarboxylic anhydrides (2a) and (2b) were prepared by 4π&lt
    inf&gt
    s&lt
    /inf&gt
    + 4π&lt
    inf&gt
    s&lt
    /inf&gt
    is photocycloaddition between cis-3,6-difluoro-or cis-3,6-dichloro-1,2-dihydrophthalic anhydride and naphthalene, respectively. 12, 15-Difluoro-and 12, 15-dichlorohexacyclo [8.6.0.0&lt
    sup&gt
    2.15&lt
    /sup&gt
    .0&lt
    sup&gt
    3.8&lt
    /sup&gt
    .0&lt
    sup&gt
    9.12&lt
    /sup&gt
    .0&lt
    sup&gt
    11.16&lt
    /sup&gt
    ] hexadeca-3,5,7-triene-13,14-dicar-boxylic anhydrides (6a) and (6b) were obtained by 2π&lt
    inf&gt
    s&lt
    /inf&gt
    + 2π&lt
    inf&gt
    s&lt
    /inf&gt
    is intramolecular photocycloaddition of adducts (2a) and (2b), respectively. 12,15-Difluorohexacyclo[8.6.0.0&lt
    sup&gt
    2.15&lt
    /sup&gt
    .0&lt
    sup&gt
    3.8&lt
    /sup&gt
    .0&lt
    sup&gt
    9.12&lt
    /sup&gt
    .0&lt
    sup&gt
    11.16&lt
    /sup&gt
    ]hexadeca-3,5,7,13-tetraene (7a) has been synthesized by the electro-oxidative decarboxylation of anhydride (6a) and the excited singlet naphthalene has been observed on irradiation of adduct (7a), and is presumably formed via an adiabatic pathway. © 1988, The Royal Society of Chemistry.

    DOI: 10.1039/P19880003307

    Scopus

    researchmap

▼全件表示

書籍等出版物

  • 光と生命の事典

    朝倉書店  2016年 

     詳細を見る

  • 光化学の事典

    朝倉書店  2014年 

     詳細を見る

  • New Trends in Structural Organic Chemistry

    Research Signpost, Kerala  2005年 

     詳細を見る

MISC

  • 光フロー反応を用いた高次フェナセンの効率的合成と有機半導体トランジスタへの応用

    プリンテッド・エレクトロニクスに向けた材料、作製プロセス技術の開発と最新事例   2017年

     詳細を見る

  • ベンゼンクロモフォアを持つシクロファンの光反応

    光化学   45   2 - 8   2014年

     詳細を見る

  • 芳香族分子ピセン結晶における超伝導の発見

    日本物理学会誌   65   978 - 983   2011年

     詳細を見る

  • 芳香族有機分子による超伝導体の開発

    ファインケミカル   40 ( 2 )   5 - 13   2011年

     詳細を見る

  • ピセン超伝導のメカニズム

    久保園芳博, 岡本秀毅, 神戸高志, 藤原明比古

    化学   65   52 - 57   2010年

     詳細を見る

  • Photochemistry of nitrogen-bridged cyclophanes: 2,11-diaza[32]anthracenoparacyclophane and 2,11-diaza[32]paracyclophane systems

    Hideki Okamoto, Minoru Yamaji, Kyosuke Satake

    Synlett   1931 - 1945   2008年

     詳細を見る

  • Preparation of a crown-ether-modified isoluminol derivative and its chemiluminescence properties in an organic medium

    H Okamoto, M Kimura

    Bioluminescence & Chemiluminescence: Progress and Perspectives   183 - 186   2005年

     詳細を見る

    記述言語:英語   出版者・発行元:WORLD SCIENTIFIC PUBL CO PTE LTD  

    DOI: 10.1142/9789812702203_0043

    Web of Science

    researchmap

  • Preparation of a crown-ether modified isoluminol derivative and its chemiluminescence properties in an organic medium

    Hideki Okamoto, Masaru Kimura

    Luminescence   2004年

  • 金属イオンの指令で光増感反応を制御する

    岡本秀毅

    化学と工業   2003年

     詳細を見る

  • バイプレンマー類の光化学発光とフォトクロミズム

    木村勝, 岡本秀毅

    ファインケミカル   28, 26-32   1999年

     詳細を見る

▼全件表示

講演・口頭発表等

  • 連続光フロー反応によるフェナセンの簡便合成と機能化フェナセンへの展開

    2017年日本化学会中国四国支部大会鳥取大会  2017年 

     詳細を見る

  • 3-アミド置換フタルイミドのESIPT機構を用いた蛍光カラーチューニング

    2017年日本化学会中国四国支部大会鳥取大会  2017年 

     詳細を見る

  • Synthesis of π-extended phenacenes by photocyclization of diarylethenes and their transistor application

    2017 Global Research Efforts on Energy and Nanomaterials (GREEN 2017)  2017年 

     詳細を見る

  • 固体中における3-アミド置換フタルイミドのESIPT蛍光

    2017年光化学討論会  2017年 

     詳細を見る

  • Synthesis and photophysics of difluoroboron complexes

    The 10th Taiwan-Japan Bilateral Symposium on Architecture of Functional Organic Molecules  2017年 

     詳細を見る

  • Photochemistry of fluorine-substituted 2,11-diaza[32]paracyclophane

    The 10th Taiwan-Japan Bilateral Symposium on Architecture of Functional Organic Molecules  2017年 

     詳細を見る

  • 3-アミド置換フタルイミドの固体状態でのESIPT機構によるRGBY発光

    第28回基礎有機化学討論会  2017年 

     詳細を見る

  • Wittig反応-Mallory光環化シーケンシャルフロー合成によるフェナセン骨格の簡便かつ系統的な構築

    第28回基礎有機化学討論会  2017年 

     詳細を見る

  • ジフェニルフェナンスリルエテンから光環化反応により生成するベンゼン環7つからなる縮環化合物の研究

    2017年光化学討論会  2017年 

     詳細を見る

  • 光縮環法で作成したフェナセンをクロモファーとするボロンジケトン錯体の合成と光物理特性の研究

    2016年光化学討論会  2016年 

     詳細を見る

  • アミノナフタルイミド誘導体の合成と蛍光ソルバトクロミズム分子としての評価

    日本化学会第96春季年会  2016年 

     詳細を見る

  • 芳香核上にメトキシ基をもつ2.11-ジアザ[3.3]パラシクロファンの合成研究

    日本化学会第96春季年会  2016年 

     詳細を見る

  • Preparation of Extremely -Extended Phenacenes and Their Application to Organic Field-Effect Transistor

    日本化学会第96春季年会  2016年 

     詳細を見る

  • 架橋鎖に窒素原子を持つ[3.3](1,4)ナフタレノファンの光反応と生成物の構造

    日本化学会第96春季年会  2016年 

     詳細を見る

  • アミノ置換2,3-ナフタルイミドの蛍光挙動:媒体環境に応答するマルチカラー発光

    2016年光化学討論会  2016年 

     詳細を見る

  • アミノナフタルイミド誘導体の合成及び蛍光特性の評価

    第27回基礎有機化学討論会  2016年 

     詳細を見る

  • ベンゼン環上に置換基を有するアザシクロファンの合成と光化学特性に関する研究

    第27回基礎有機化学討論会  2016年 

     詳細を見る

  • 窒素架橋を有するナフタレノファンの光反応:分子内ナフタレン光二量化反応と生成物の構造

    第27回基礎有機化学討論会  2016年 

     詳細を見る

  • アミノナフタルイミド誘導体の合成および蛍光特性の評価

    第37回光化学若手の会  2016年 

     詳細を見る

  • マロリー光環化反応によるピセン骨格の形成に関する研究

    第37回光化学若手の会  2016年 

     詳細を見る

  • メトキシ置換ジアザ[3.3]パラシクロファンの合成研究

    第37回光化学若手の会  2016年 

     詳細を見る

  • Facile Synthesis of pi-extended phenacenes by the Mallory photocyclization and their application to organic field-effect transistor

    The 11th Korea-Japan Symposium on Frontier Photoscience  2016年 

     詳細を見る

  • Photochemical Synthesis and Photophysical features of Condensed Coumarin Derivatives Studied by Emission Measurements, Steady State and Laser Flash Photolyses

    26th IUPAC Symposium on Photochemistry  2016年 

     詳細を見る

  • Facile Synthesis of pi-extended phenacenes by the Mallory photocyclization and their application to organic field-effect transistor

    26th IUPAC Symposium on Photochemistry  2016年 

     詳細を見る

  • 置換基を有するアザシクロファンの光反応

    2016年日本化学会中国四国支部大会香川大会  2016年 

     詳細を見る

  • Wittig反応-Mallory光環化シーケンシャル合成によるフェナセン骨格の簡便な構築

    2016年日本化学会中国四国支部大会香川大会  2016年 

     詳細を見る

  • アミノ及びアミド置換ナフタルイミド誘導体の合成と蛍光特性の評価

    2016年日本化学会中国四国支部大会香川大会  2016年 

     詳細を見る

  • ベンゼンおよびナフタレンをコアにもつアザシクロファンの光化学反応

    2015年日本化学会中国四国支部大会  2015年 

     詳細を見る

  • 光フロー反応による高次フェナセンの効率的合成とOFETへの応用

    2015年日本化学会中国四国支部大会有機エレクトロニクスシンポジウム  2015年 

     詳細を見る

  • Preparation of Extremely -Extended Phenacenes by Mallory Homologation Strategy and Their Application to Organic Field-Effect Transistor

    International Symposium on Construction and Application of Functional Molecules/Systems  2015年 

     詳細を見る

  • 光フロー反応を用いるフェナセンの効率的合成

    近畿化学協会第68回フローマイクロ合成研究会  2015年 

     詳細を見る

  • ジピコリルアミノメチルレセプターを持つアントラセンジカルボイミドとアントラセンジカルボヒドラジドの合成および金属イオンに対する蛍光,化学発光応答

    2015年光化学討論会  2015年 

     詳細を見る

  • Fluorescence Properties of Trifluoroacetamido-substituted Phthalimides: Response to Halide and Alkali-Metal Ions Induced by 254-nm Photolysis

    The 11th Korea-Japan Symposium on Frontier Photoscience–2015  2015年 

     詳細を見る

  • ベンゼンおよびナフタレンをコアに持つアザシクロファンの合成

    日本化学会第95春季年会  2015年 

     詳細を見る

  • フロー法によるMallory光環化反応の効率化と置換ピセンの合成への展開

    日本化学会第95春季年会  2015年 

     詳細を見る

  • Photochemistry of Nitrogen-bridged Paracyclophanes: One-step Formation of Benzene Dimers

    Symposium on New ChemistryBased on Cyclophane and pi-Electronic molecules  2015年 

     詳細を見る

  • 窒素架橋を持つ[3.3]パラシクロファンの光化学反応:ベンゼン二量体の生成

    第3回有機光化学研究会  2015年 

     詳細を見る

  • 高性能フェナセン薄膜 FET の開発と論理回路応用

    2015年日本化学会中国四国支部大会  2015年 

     詳細を見る

  • アミノナフタルイミド誘導体の合成と蛍光特性

    2015年日本化学会中国四国支部大会  2015年 

     詳細を見る

  • メトキシ置換 2,11-ジアザ [3.3]パラシクロファンの合成研究

    2015年日本化学会中国四国支部大会  2015年 

     詳細を見る

  • 連続フローリアクタを利用したマロリー光環化による化学修飾フェナセンの合成

    2015年日本化学会中国四国支部大会  2015年 

     詳細を見る

  • Synthesis of Phenacenes by Photochemical Cyclization Reactions of Diarylethanes and Diarylethenes

    The 8th Taiwan-Japan Bilateral Symposium on Architecture of Functional Organic Molecules  2014年 

     詳細を見る

  • Synthesis of Phenacenes by Mallory Reaction: Comparison of Efficiencies by Batch and Flow Photolyses

    The 10th Korea-Japan Symposium on Frontier Photoscience–2014 (KJFP2014)  2014年 

     詳細を見る

  • Efficient Synthetic Flow Photoreaction: Facile Preparation of Phenacenes and Their Application to OFET

    The 10th Korea-Japan Symposium on Frontier Photoscience–2014 (KJFP2014)  2014年 

     詳細を見る

  • Mallory環化によるフェナセン類の合成:バッチ法とフロー法による反応効率の比較

    日本化学会第94春季年会  2014年 

     詳細を見る

  • テトラアザ[34](1,2,4,5)シクロファン誘導体の合成

    大阪府立大学21世紀科学研究機構分子エレクトロニックデバイス研究所第16回研究会  2014年 

     詳細を見る

  • フロー法によるMallory光環化反応の効率化と置換ピセンの合成

    大阪府立大学21世紀科学研究機構分子エレクトロニックデバイス研究所第16回研究会  2014年 

     詳細を見る

  • 光環化反応によるフェナセンの合成と高性能OFETへの展開

    大阪府立大学21世紀科学研究機構分子エレクトロニックデバイス研究所第16回研究会  2014年 

     詳細を見る

  • 光でつくるフェナセン:合成と電子材料への展開

    第15回日本写真学会アンビエント技術研究会  2014年 

     詳細を見る

  • 光縮環法を用いたアシルフェナセンの合成と光物理・光化学的性質の研究

    2014年光化学討論会  2014年 

     詳細を見る

  • ジアザパラシクロファンの光化学反応におけるベンゼンの二量化反応

    2014年光化学討論会  2014年 

     詳細を見る

  • Photophysical and Photochemical Processes of Excited Singlet and Triplet [3n]Cyclophanes (n = 2–6) Studied by Emission Measurements, Steady-state and Laser Flash Photolyses

    The 8th Taiwan-Japan Bilateral Symposium on Architecture of Functional Organic Molecules  2014年 

     詳細を見る

  • Photoreaction of Fluorinated 2,11-Diaza[3.3]paracyclophane: Formation of Cage Diene Type Benzene Dimer

    The 9th Korea-Japan Symposium on Frontier Photoscience–2013 (KJFP2013)  2013年 

     詳細を見る

  • ベンゼン環上にフッ素置換基を持つジアザパラシクロファンの光化学反応

    2013年光化学討論会  2013年 

     詳細を見る

  • アレーン置換ジベンゾクリセンの電気化学的および分光学的特性

    第37回有機電子移動化学討論会  2013年 

     詳細を見る

  • Fluorescence properties of trifluoroacetamide substituted phthalimides

    The 9th Korea-Japan Symposium on Frontier Photoscience–2013 (KJFP2013)  2013年 

     詳細を見る

  • Photochemical Synthesis of [n]Phenacenes: 9-Fluorenone Sensitized Photocyclization of 1,2-Diarylethane

    The 9th Korea-Japan Symposium on Frontier Photoscience–2013 (KJFP2013)  2013年 

     詳細を見る

  • オキシカルボニル基を有するアゼピン誘導体の1,5-シグマトロピー転位

    2013年日本化学会中国四国支部大会  2013年 

     詳細を見る

  • トリフルオロアセトアミド置換フタルイミドの蛍光特性

    2013年日本化学会中国四国支部大会  2013年 

     詳細を見る

  • ピセンジカルボン酸エステルの簡便な合成と官能基変換

    2013年日本化学会中国四国支部大会  2013年 

     詳細を見る

  • フッ素置換アザシクロファンの光化学反応によるカゴ型ジエン生成とその構造及び反応性

    2013年日本化学会中国四国支部大会  2013年 

     詳細を見る

  • Mallory環化によるフェナセンの合成:光フローリアクタを用いる合成の効率化

    2013年光化学討論会  2013年 

     詳細を見る

  • Photochemical Synthesis and Properties of [n]Phenacenes (n= 3–6)

    7th Asian Photochemistry Conference 2012  2012年 

     詳細を見る

  • 2,11-ジアザ[3.3]パラシクロファンの光化学反応:p,p’-ジベンゼン骨格の生成

    2012年光化学討論会  2012年 

     詳細を見る

  • ジアザ[3.3]パラシクロファンの光化学反応によるp,p'-ジベンゼンの生成とその構造

    日本化学会第92春季年会  2012年 

     詳細を見る

  • ジアザ[3.3]パラシクロファンの光化学反応

    日本化学会第92春季年会  2012年 

     詳細を見る

  • 3-および4-アミノフタルイミドのペルフルオログルタリルアミド誘導体のアミド‐アミダート平衡に基づく蛍光特性操作

    2012年光化学討論会  2012年 

     詳細を見る

  • プロパン鎖でリンクさせたトリフルオロアセチルアミノフタルイミド二量体のハロゲン化物イオンおよび金属イオンに対する蛍光応答

    2012年光化学討論会  2012年 

     詳細を見る

  • ジピコリルアミノメチルレセプターを有する新規化学発光プローブの合成および金属イオン種に対する化学発光応答

    2012年日本化学会西日本大会  2012年 

     詳細を見る

  • 3,10-ピセンジカルボン酸エステルの簡便な合成

    2012年日本化学会西日本大会  2012年 

     詳細を見る

  • ベンゼン環上に置換基を有する 2,11-ジアザ[3.3]パラシクロファン誘導体の合成

    2012年日本化学会西日本大会  2012年 

     詳細を見る

  • 2 位に置換基を導入した2H-アゼピン誘導体の合成と反応

    2012年日本化学会西日本大会  2012年 

     詳細を見る

  • 2-アルキルアミノ-3H-アゼピン類の合成および反応性

    2012年日本化学会西日本大会  2012年 

     詳細を見る

  • 2-メトキシ-3H-アゼピン誘導体とグリニャール試薬の反応

    第23回基礎有機化学討論会  2012年 

     詳細を見る

  • 光化学反応によるフルミネン([6]フェナセン)の合成および電子スペクトル

    第23回基礎有機化学討論会  2012年 

     詳細を見る

  • ジアザ[3.3]パラシクロファンの合成,構造および光化学反応

    第23回基礎有機化学討論会  2012年 

     詳細を見る

  • ジピコリルアミノメチルレセプターを有するアントラセンジカルボヒドラジドの合成および金属イオン種に対する化学発光応答

    2011年光化学討論会  2011年 

     詳細を見る

  • Preparation of Anthracenedicarboxylic-acid-derived Fluorescence and Chemiluminescence Probes Incorporating Dipicolylaminomethyl Receptors and Their Luminescence Responses to Metal Cations

    XXVth International Conference on Photochemistry  2011年 

     詳細を見る

  • アミンおよびアルコール存在下でのo-アルキルフェニルナイトレンの反応における温度依存性

    日本化学会第91春季年会  2011年 

     詳細を見る

  • ジピコリルアミノレセプターで修飾されたアントラセンジカルボン酸類縁体をルミノフォアとして用いるPETプローブの構築と発光特性

    日本化学会第91春季年会  2011年 

     詳細を見る

  • ベンゼン環上にメチル基を有するジアザ[3.3]パラシクロファン類の合成と光化学反応

    2011年光化学討論会  2011年 

     詳細を見る

  • 分子内電荷移動型蛍光色素を用いるマルチセンシングプローブの構築

    第5回有機π電子系シンポジウム  2011年 

     詳細を見る

  • 2-メトキシ-3H-アゼピン誘導体とアミン類の求核置換反応による2-アルキルアミノ-3H-アゼピン類の合成

    2011年日本化学会西日本大会  2011年 

     詳細を見る

  • メタノール存在下,p-トリメチルシリルニトロベンゼンとトリブチルホスフィンの反応

    2011年日本化学会西日本大会  2011年 

     詳細を見る

  • o-アルキルフェニルナイトレンの反応により得られる3-および7-アルキル-3H-アゼピンの生成比に与える温度効果

    第41回 複素環化学討論会  2011年 

     詳細を見る

  • ヘキサフルオロ[33](1,3,5)シクロファンの光化学反応:かご型ジエンの単離と反応

    2011年光化学討論会  2011年 

     詳細を見る

  • ニトロベンゼン誘導体から5-ホルミルペンタジエン酸の簡便合成法の開発

    2010年日本化学会西日本大会  2010年 

     詳細を見る

  • 2-置換2H-アゼピン誘導体の光および熱反応性

    2010年日本化学会西日本大会  2010年 

     詳細を見る

  • ジナフチルエタンの光化学反応:芳香族カルボニル化合物存在下での光照射によるピセン骨格生成

    2010年光化学討論会  2010年 

     詳細を見る

  • トリフルオロアセトアミド置換キノリン誘導体の亜鉛イオン及び 銅イオンに対する蛍光応答性スイッチング

    日本化学会第90春季年会  2010年 

     詳細を見る

  • アルコール及びアミン存在下におけるフェニルニトレンの反応

    日本化学会第90春季年会  2010年 

     詳細を見る

  • Facile Reaction Path to 3H-Azepine from Alkylphenylnitrene

    2010 PACIFICHEM  2010年 

     詳細を見る

  • Photo- and thermal reaction of 2-alkoxy and 2-alkylthio 2H-azepines

    2010 PACIFICHEM  2010年 

     詳細を見る

  • ジナフチルエタンの光増感反応によるピセン骨格生成

    第4回有機π電子系シンポジウム  2010年 

     詳細を見る

  • 3-メチル-3H-アゼピン誘導体の合成および理論計算と核磁気共鳴スペクトルよる配座解析

    2010年日本化学会西日本大会  2010年 

     詳細を見る

  • アントラセンジカルボキシイミドフルオロフォアを用いたPET センサーの合成と発光挙動

    2010年日本化学会西日本大会  2010年 

     詳細を見る

  • トリフルオロアセトアミド置換キノリンの蛍光挙動:アミド-アミデート平衡を利用した金属イオン応答スイッチング

    2010年日本化学会西日本大会  2010年 

     詳細を見る

  • フェムト秒レーザーパルスによるアントラセン光二量体の3光子分解反応

    2009年光化学討論会  2009年 

     詳細を見る

  • Fluorescence behavior of 3-trifluoroacetylamino derivative of phthalimide: Photochemically induced response to Li+/I- ion pair

    XXIVth International Conference on Photochemistry  2009年 

     詳細を見る

  • トリフルオロアセチルアミノフタルイミド誘導体の蛍光挙動:LiIに対する選択的光応答

    日本化学会第89春期年会  2009年 

     詳細を見る

  • 新規なアルキル置換3H-アゼピン類の合成ならびに反応性

    日本化学会第89春期年会  2009年 

     詳細を見る

  • 両端にホルミル基とカルボキシル基を持つブタジエン誘導体の簡便合成

    日本化学会西日本大会  2009年 

     詳細を見る

  • [3.3]パラシクロファンの光化学反応

    日本化学会西日本大会  2009年 

     詳細を見る

  • 2H-アゼピンの光反応挙動

    日本化学会西日本大会  2009年 

     詳細を見る

  • フェニルニトレンから誘導されるデヒドロアゼピンとアルコールの反応の立体効果

    第39回複素環化学討論会  2009年 

     詳細を見る

  • トリフルオロアセタミド置換フタルイミドの蛍光挙動:ハロゲン化物イオン及びイオンペアへの光応答

    2009年光化学討論会  2009年 

     詳細を見る

  • Fluorescence properties of 4-acetylamino derivatives of phthalimide: A potential halide-ion recognition probe

    XXIIth IUPAC Symposium on Photochemistry  2008年 

     詳細を見る

  • 1-ニトロナフタレン類とトリブチルホスフィンとの反応によるベンゾ縮環アゼピンの合成

    2008年日本化学会西日本大会  2008年 

     詳細を見る

  • 2-Alkoxy-2H-Azepineの合成及びその化学反応性

    2008年日本化学会西日本大会  2008年 

     詳細を見る

  • ピコリルアミノレセプターを持つフタリドの合成と金属イオンへの蛍光応答

    2008年光化学討論会,  2008年 

     詳細を見る

  • 4-アミノフタルイミドのトリフルオロアセトアミド誘導体のヨウ化物イオンに対するケイ光応答

    2008年光化学討論会,  2008年 

     詳細を見る

  • Friedel-Crafts Reaction of Delocalized Azepinium Ions with Benzene and Five-Membered Aromatic Heterocycles

    23rd European Colloquium on Heterocyclic Chemistry (ECHC08)  2008年 

     詳細を見る

  • ハロゲン化物イオンを見分けるプローブ:4-トリフルオロアセチルアミノフタルイミドのケイ光挙動

    第4回分子情報ダイナミクス研究会  2008年 

     詳細を見る

  • ニトロ基を持つアリール化合物類とトリブチルホスフィンとの反応性の検討

    2007年日本化学会西日本大会  2007年 

     詳細を見る

  • Exploration of a Shortcut Approach to Diazepine Derivatives from Nitropyridines

    2007年日本化学会西日本大会  2007年 

     詳細を見る

  • モノアザトリエン共役をもつアゼピン誘導体の光反応挙動の研究

    2007年日本化学会西日本大会  2007年 

     詳細を見る

  • 4-(トリフルオロアセチルアミノ)フタルイミド誘導体のハロゲン化物イオン対するケイ光応答

    2007年日本化学会西日本大会  2007年 

     詳細を見る

  • 2H-及び3H-Azepine誘導体の合成及びその化学反応性の検討

    2007年日本化学会西日本大会  2007年 

     詳細を見る

  • ゼオライト細孔内における4-acetylbiphenylの光物性に対する共存金属イオンの効果

    2007年光化学討論会  2007年 

     詳細を見る

  • ジアザ[32]-およびトリアザ[33]シクロファンのトリフルオロアセトアミド誘導体の合成と光反応挙動

    2007年光化学討論会  2007年 

     詳細を見る

  • Photochemistry of nitrogen-bridged cylophanes(依頼講演)

    3rd International Workshop on Molecular Information and Dynamics  2007年 

     詳細を見る

  • Preparation and photoproperties of (aza)n[3n]cyclophanes (n = 2,3)

    ICP2007―XXIII International Conference on Photochemistry  2007年 

     詳細を見る

  • 固体型色素増感太陽電池に用いる光増感シアニン色素の合成と評価

    2007年日本化学会西日本大会  2007年 

     詳細を見る

  • 1,8-ナフタルイミドのトリフルオロアセトアミド誘導体の蛍光挙動

    光化学若手の会  2007年 

     詳細を見る

  • ゼオライト細孔中の共存カチオンによる4-acetylbiphenylの光物性への影響

    日本化学会内87春季年会  2007年 

     詳細を見る

  • A Trifruoroacetamide Derivative of 1,8-Naphthalimide As Solvent And Metal-Ion Sensitive Fluorophore

    XXIst IUPAC Symposium on Photochemistry  2006年 

     詳細を見る

  • アゼピニウムイオンのフリーデル・クラフツ反応および反応生成物の挙動について

    日本化学会西日本大会  2006年 

     詳細を見る

  • ジアザパラシクロファン誘導体の合成と光反応:ベンゼン光二量化の新しい反応モード

    2006年光化学討論会  2006年 

     詳細を見る

  • ジアザシクロファン類の光反応(依頼講演)

    第28回光化学若手の会  2006年 

     詳細を見る

  • 両末端にソルバトフルオロクロミズム性色素を持つポダンドのケイ光挙動

    2005年光化学討論会  2005年 

     詳細を見る

  • 1,8-ナフタルイミドトリフルオロアセトアミド誘導体のケイ光特性:自発的プロトン解離に基づく発光挙動

    2005年光化学討論会  2005年 

     詳細を見る

  • 溶媒駆動によるケイ光操作

    第27回光化学若手の会  2005年 

     詳細を見る

  • クラウン化アミノフタルイミド誘導体の蛍光特性とロジックゲート動作

    日本化学会第85春季年会  2005年 

     詳細を見る

  • 1,8-ナフタルイミドアセトアミド誘導体のケイ光特性:アルコール中における白色LED類似の発光スペクトル

    第20回シクロファン研究会  2005年 

     詳細を見る

  • アザクラウン化イソルミノールの合成と化学発光挙動

    化学発光生物発光研究会第23回学術講演会  2005年 

     詳細を見る

  • 2個の化学発光部位を有するイミダゾール類の化学発光

    2005年光化学討論会  2005年 

     詳細を見る

  • Photochemistry via a Triplet Exciplex between an Aromatic Triplet and a Ground-State Ketone

    XXth IUPAC Symposium on Photochemistry  2004年 

     詳細を見る

  • 新規なアザトロピリウムイオンと芳香族化合物の求電子反応

    第34回複素環化学討論会  2004年 

     詳細を見る

  • 三重項励起錯体を経由するジナフチルエタンの光化学反応過程の研究

    2004年光化学討論会  2004年 

     詳細を見る

  • ヘキサプリズマン骨格合成-[4 + 4]光環化付加の反応条件の最適化-

    2004年光化学討論会  2004年 

     詳細を見る

  • アザクラウン化フタルイミドの合成とケイ光挙動:ソルバトフルオロクロミズムと金属イオン応答を示すケイ光センサー

    2004年光化学討論会  2004年 

     詳細を見る

  • Preparation of a crown-ether modified isoluminol derivative and its chemiluminescence properties in an organic medium

    13th International Symposium on Bioluminescence and Chemiluminescence  2004年 

     詳細を見る

  • 2,11-ジアザ[3,3](9,10)アントラセノパラシクロファン誘導体の光化学

    第18回シクロファン研究会  2003年 

     詳細を見る

  • 2,11-ジアザ[3,3](9,10)アントラセノパラシクロファン光異性体の三重項光増感反応

    2003年光化学討論会  2003年 

     詳細を見る

  • 共役アゼピニウムイオンの合成と求電子反応性

    第33回複素環化学討論会  2003年 

     詳細を見る

  • Preparation and chemiluminescent properties of an isoluminol having an azacrown ether function

    XXIst International Conference on Photochemisry  2003年 

     詳細を見る

  • 化学発光を操作するための新しい試み

    第25回光化学若手の会in筑波  2003年 

     詳細を見る

  • クラウンエーテルで機能化したイソルミノール誘導体の合成と化学発光挙動

    日本化学会第83春季年会  2003年 

     詳細を見る

  • アントラセノパラシクロファン誘導体の光反応:アントラセンとベンゼンクロモフォア間の[4+4]光付加・解離過程

    第24回光化学若手の会in大阪  2002年 

     詳細を見る

  • 2-メトキシ-3H-アゼピン誘導体と臭素およびNBSとの反応

    日本化学会第81春季年会  2002年 

     詳細を見る

  • 2-アルコキシ-及び2-アルキルチオ-2H-アゼピン類の合成と反応性

    日本化学会第81春季年会  2002年 

     詳細を見る

  • クラウンエーテル機能をもつ2,4,5-トリフェニルイミダゾール誘導体の金属イオンによる化学発光特性モジュレーション

    日本化学会第81春季年会  2002年 

     詳細を見る

  • 2H-アゼピン環で観測される水素原子及びアルキルチオ基の[1,5]シグマトロピー転位

    第32回複素環化学討論会  2002年 

     詳細を見る

  • 化学発光操作の新しい手法:クラウン機能化ロフィンペルオキシドの化学発光挙動

    2002年日本化学会西日本大会  2002年 

     詳細を見る

  • エチレンジアミンホスト機能を持つパラシクロアントラセノファン誘導体のフォトクロミズム

    2002年光化学討論会  2002年 

     詳細を見る

  • Chemiluminescence of a lophine peroxide having a crown-ether function: A novel guest-sensitive chemiluminophore

    XIXth IUPAC Symposium on PhotochemistryJuly  2002年 

     詳細を見る

  • クラウンエーテルで機能化されたロフィンペルオキシドの生成とその化学発光制御

    日本化学会第79春季年会  2001年 

     詳細を見る

  • N-Hydroxy- and N-Alkoxythiazole-2(3H)-thiones as Novel Photo-Fenton Reagents: Photo-induced Oxyl-radical Release and DNA Strand Breaks

    光化学討論会  2001年 

     詳細を見る

  • Reaction of 2-methoxy-5-tert-butyl-3H-azepine with sodium alkoxyde and alkyllithium

    18th International Congress of Heterocyclic Chemistry  2001年 

     詳細を見る

  • [3.3]パラシクロ(9,10)アントラセノファン誘導体とその光異性体の発光挙動

    1999年光化学討論会  1999年 

     詳細を見る

▼全件表示

受賞

  • 岡山工学振興会科学技術賞

    2015年  

     詳細を見る

    受賞国:日本国

    researchmap

  • 有機合成化学協会中国四国支部奨励賞

    2007年  

     詳細を見る

    受賞国:日本国

    researchmap

  • ITE Research Award

    2003年  

     詳細を見る

 

担当授業科目

  • 反応有機化学演習 (2021年度) 通年  - その他

  • 反応有機化学特論 (2021年度) 前期  - 月1,月2

  • 基礎化学実験 (2021年度) 第4学期  - 木5,木6,木7,木8

  • 有機光化学 (2021年度) 前期  - その他

  • 有機化学1 (2021年度) 第1学期  - 金1,金2

  • 有機化学2 (2021年度) 第2学期  - 金1,金2

  • 有機化学I (2021年度) 1・2学期  - 金1,金2

  • 有機機器分析 (2021年度) 1・2学期  - 水3,水4

  • 有機機器分析1 (2021年度) 第1学期  - 水3,水4

  • 有機機器分析2 (2021年度) 第2学期  - 水3,水4

  • 反応化学特別講義Ⅱ (2020年度) 集中  - その他

  • 反応有機化学演習 (2020年度) 通年  - その他

  • 反応有機化学特論 (2020年度) 前期  - 月1,月2

  • 基礎化学実験 (2020年度) 第4学期  - 木5,木6,木7,木8

  • 有機光化学 (2020年度) 前期  - その他

  • 有機化学1 (2020年度) 第1学期  - 金1,金2

  • 有機化学2 (2020年度) 第2学期  - 金1,金2

  • 有機化学I (2020年度) 1・2学期  - 金1,金2

  • 有機機器分析 (2020年度) 1・2学期  - 水3,水4

  • 有機機器分析1 (2020年度) 第1学期  - 水3,水4

  • 有機機器分析2 (2020年度) 第2学期  - 水3,水4

▼全件表示