Photoinduced electron transfer reactions of highly twisted 1-donor-substituted 2,4,6-triphenylpyridinium cations

Takashi Namikawa, Masato Kuratsu, Masatoshi Kozaki, Toshio Matsushita, Akio Ichimura, Keiji Okada*, Akio Yoshimura, Noriaki Ikeda, Koichi Nozaki

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

4 被引用数 (Scopus)

抄録

Primary processes of photoelectron transfer reactions of highly twisted 1-mesityl- (1a), 1-(2,5-dimethoxyphenyl)- (1b), and 1-(2,3,5,6-tetramethoxyphenyl)- 2,4,6-triphenylpyridinium (1c) tetrafluoroborates in butyronitrile were investigated. The charge-shift states were observed in all cases. Irradiation of 1a generated the charge-shift state (360, 475, and 550 nm), which was converted with a lifetime of 21 ns into the long-lived triplet state (τ = 2.2 μs) localized on the pyridinium moiety. On the other hand, compounds 1b and 1c generated the charge-shift states (λmax = 440 and 540 and λmax = ca. 550 nm as a broad absorption) of short lifetimes, 35 and 16 ps, respectively, decaying exclusively to the singlet ground states.

本文言語英語
ページ(範囲)254-260
ページ数7
ジャーナルJournal of Photochemistry and Photobiology A: Chemistry
194
2-3
DOI
出版ステータス出版済み - 2008/02/20

ASJC Scopus 主題領域

  • 化学一般
  • 化学工学一般
  • 物理学および天文学一般

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