Tsuyoshi Oshima  Dr. Iori Yamanaka  Dr. Anupriya Kumar  Dr. Junichiro Yamaguchi  Dr. Taeko Nishiwaki‐Ohkawa  Kei Muto  Rika Kawamura  Dr. Tsuyoshi Hirota  Prof. Dr. Kazuhiro Yagita  Prof. Dr. Stephan Irle  Prof. Dr. Steve A. Kay  Prof. Dr. Takashi Yoshimura  Prof. Dr. Kenichiro Itami 《Angewandte Chemie (International ed. in English)》2015,54(24):7200-7200

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Miyabi Hiyama  Yoshifumi Noguchi  Hidefumi Akiyama  Kenta Yamada  Nobuaki Koga 《Photochemistry and photobiology》2015,91(4):819-827

To elucidate the factors determining the spectral shapes and widths of the absorption and fluorescence spectra for keto and enol oxyluciferin and their conjugate bases in aqueous solutions, the intensities of vibronic transitions between their ground and first electronic excited states were calculated for the first time via estimation of the vibrational Franck–Condon factors. The major normal modes, overtones and combination tones in absorption and fluorescence spectra are similar for all species. The theoretical full widths at half maximum of absorption spectra are 0.4–0.7 eV and those for the fluorescence spectra are 0.4–0.5 eV, except for phenolate‐keto that exhibits exceptionally sharp peak widths due to the dominance of the 0–0′ or 0′–0 band. These spectral shapes and widths explain many relevant features of the experimentally observed spectra.  相似文献   

    

Dr. Takanori Iwasaki  Xin Min  Asuka Fukuoka  Prof. Dr. Hitoshi Kuniyasu  Prof. Dr. Nobuaki Kambe 《Angewandte Chemie (International ed. in English)》2016,55(18):5550-5554

In the presence of a nickel catalyst, 1,3‐butadiene undergoes selective dimerization and alkylarylation with alkyl fluorides and aryl Grignard reagents to give 1,6‐octadienes with alkyl and aryl groups at the 3‐ and 8‐positions, respectively, by the consecutive formation of three carbon–carbon bonds. The formation of an anionic nickel complex plays an important role in forming C?C bonds with alkyl fluorides.  相似文献   

    

Dr. Kuirun Zhang  Dr. Soonchul Kang  Dr. Zi‐shuo Yao  Kazusa Nakamura  Dr. Takashi Yamamoto  Prof. Dr. Yasuaki Einaga  Nobuaki Azuma  Dr. Yuji Miyazaki  Prof. Dr. Motohiro Nakano  Dr. Shinji Kanegawa  Prof. Dr. Osamu Sato 《Angewandte Chemie (International ed. in English)》2016,55(20):6047-6050

Heterometallic Prussian blue analogues are known to exhibit thermally induced charge transfer, resulting in switching of optical and magnetic properties. However, charge‐transfer phase transitions have not been reported for the simplest FeFe cyanide‐bridged systems. A mixed‐valence Fe^II/Fe^III cyanide‐bridged coordination polymer, {[Fe(Tp)(CN)₃]₂Fe(bpe)?5 H₂O}_n, which demonstrates a thermally induced charge‐transfer phase transition, is described. As a result of the charge transfer during this phase transition, the high‐spin state of the whole system does not change to a low‐spin state. This result is in contrast to FeCo cyanide‐bridged systems that exhibit charge‐transfer‐induced spin transitions.  相似文献   

    

Terao J  Oda A  Ikumi A  Nakamura A  Kuniyasu H  Kambe N 《Angewandte Chemie (International ed. in English)》2003,42(29):3412-3414

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Makoto Sasaki  Nobuaki Matsumori  Takahiro Maruyama  Taro Nonomura  Michio Murata  Kazuo Tachibana  Takeshi Yasumoto 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》1996,108(15):1782-1785

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Ikuya Shibata  Takeyoshi Kano  Nobuaki Kanazawa  Shoji Fukuoka  Akio Baba 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2002,114(8):1447-1450

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Jun Terao  Hirohisa Todo  Hideyuki Watanabe  Aki Ikumi  Nobuaki Kambe 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2004,116(45):6306-6308

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Muhammad Faisal  Nobuaki Sato  Armando T. Quitain  Hiroyuki Daimon  Koichi Fujie 《国际化学动力学杂志》2007,39(3):175-180

The kinetics and pathway of hydrothermal decomposition of aspartic acid were studied using a continuous‐flow tubular reactor. The reaction was carried out in the temperature range of 200–260°C and at a pressure of 20 MPa. Deamination was the primary reaction, indicated by the presence of significant amount of ammonia, fumaric acid, or maleic acid in the products. Other reaction products were pyruvic acid, malic acid, and traces of succinic and lactic acid. Traces of alanine were also detected, showing the possibility of decomposing high‐molecular weight amino acids to obtain simple amino acids such as glycine or alanine. Results on the effect of reaction parameters demonstrated that decomposition of aspartic acid is highly temperature dependent under hydrothermal conditions. For a slight temperature difference of 60°C (from 200 to 260°C), the first‐order reaction rate constants of 0.003 significantly increased to 0.231 s^?1. The activation energy was 144 kJ/mol, as calculated by the Arrhenius equation. No significant effect was exhibited by other reaction parameters such as pH and pressure. The results are useful in controlling the hydrolysis of proteinaceous materials toward high yield of aspartic acid under hydrothermal conditions. © 2007 Wiley Periodicals, Inc. 39: 175–180, 2007  相似文献   

    

Jun Terao  Susumu Tsuda  Keisuke Tsurui  Nobuaki Kambe 《Macromolecular Symposia》2010,297(1):54-60

Summary: We developed a new method for synthesizing an organic-soluble permethylated cyclodextrin-based insulated molecular wire (IMW); this method involves the polymerization of a symmetrical linked inclusion complex as a monomer. This monomer was synthesized by dimerization of linked inclusion complexes at the terminal alkynyl groups by Glaser coupling. The polyrotaxane thus obtained is highly soluble in a variety of organic solvents and has a high covering ratio, regioregularity, and photoluminescence efficiency.  相似文献