Highly selective cis-trans photoisomerization of 1-pyrenylethylenes: Relations between the modes of isomerization and potential energy surfaces.
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概要
- 論文の詳細を見る
Among 1-pyrenylethylenes with an alkyl (<I>t</I>-butyl) or an aryl (phenyl) group on the β ethylenic carbon, 1-(3,3-dimethyl-1-butenyl)pyrene (BP) undergoes cis-to-trans one-way isomerization on benzil sensitization, whereas 1-styrylpyrene (SP) undergoes mutual isomerization between the cis and trans isomers to afford an extremely high photostationary state composition (98%) of the trans isomer. Transient spectroscopy and measurements of the isomerization quantum yields revealed that the trans triplet state is the most stable and populated conformation on the triplet energy surface for both BP and SP; however, a higher degree of stabilization of the trans conformation for BP than for SP compared to the perpendicularly twisted conformation makes BP and SP one-way and two-way isomerizing, respectively.
- 公益社団法人 日本化学会の論文
著者
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Arai Tatsuo
Department Of Applied Physics Nagoya University
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Sakuragi Hirochika
Department Of Chemistry University Of Tsukuba
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Tokumaru Katsumi
Department of Chemistry Faculty of Science The University of Tokyo
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Okamoto Hiroaki
Department of Advanced Materials and Science, Faculty of Engineering, Yamaguchi University
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Sakuragi Hirochika
Department of Chemistry, Universiry of Tsukuba
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