The photochemistry of the host-guest complex. VII. The photoreaction of dicyanopyrazine derivatives having a crown ether moiety.

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概要

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• The irradiation of 4′-(5,6-dicyano-2-pyrazinyl)benzo-15-crown-5 and 5,6-dicyano-2-(3,4-dimethoxyphenyl)pyrazine in the presence of a tertiary or secondary amine caused reductive decyanation to give 5-decyano derivatives, which in turn gave bis(decyano) derivatives on further irradiation. Free-energy changes upon single-electron transter from the amine to the excited state of dicyanopyrazine derivatives are exothermic for triethylamine and diethylamine, but endothermic for butylamine. The single-electron transfer was evidenced by the effect of the sodium ion on the quantum yields of the reaction products and the fluorescence quenching.

• 公益社団法人 日本化学会の論文

著者

• Tada Masaru

  Department Of Chemistry School Of Science And Engineering Waseda University

• Hirano Hideki

  Department of Chemistry, School of Science and Engineering, Waseda University

• Hamazaki Hirohide

  Department of Chemistry, School of Science and Engineering, Waseda University

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