Photochemical reactions of bromoanthraquinones in ethanol at room temperature studied by steady-state photolysis and laser photolysis.
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概要
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Photolyses of α-bromoanthraquinones (1-bromo-, 1,5-dibromo-, and 1,8-dibromoanthraquinones) with 366-nm light in ethanol at room temperature gave rise to the formation of debrominated 9,10-anthracenediol as a final product. This was interpreted in terms of the sequence of the formation of α-bromo-9,10-anthracenediols followed by the photochemical dehydrobromination yielding the corresponding anthraquinones with one less bromine atom than original ones. Photolysis of 2-bromoanthraquinone gave rise to the formation of 2-bromo-9,10-anthracenediol, and no dehydrobromination was observed. Combined with the values of the quantum yields of photoreduction, the results of the laser photolyses revealed that the rate constant for the hydrogen-atom abstraction from ethanol decreased as an increase of the ππ<SUP>*</SUP> character of the lowest triplet states of α-bromoanthraquinones.
- 公益社団法人 日本化学会の論文
著者
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NAKAYAMA Toshihiro
Department of Chemistry, Kyoto Institute of Technology
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Hamanoue Kumao
Department Of Chemistry Kyoto Institute Of Technology
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Sawada Kazuhide
Department Of Civil Engineering Gifu University
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Hirase Susumu
Department of Chemistry and Materials Technology, Faculty of Engineering and Design, Kyoto Institute
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NAKAYAMA Toshihiro
Department of Chemistry and Materials Technology, Faculty of Engineering and Design, Kyoto Institute of Technology
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Yamamoto Yoshiaki
Department of Clinical Research, National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders
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Teranishi Hiroshi
Department of Chemistry, Kyoto Institute of Technology
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Teranishi Hiroshi
Department of Chemistry, Faculty of Technology, Kyoto Institute of Technology
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Sawada Kazuhide
Department of Chemistry, Kyoto Institute of Technology
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