Hydrogen-bonding dynamics in photoinduced electron transfer in ferrocene - Quinone linked dyad with a rigid amide spacer

Shunichi Fukuzumi, Yutaka Yoshida, Ken Okamoto, Hiroshi Imahori, Yasuyuki Araki, Osamu Ito

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

A newly designed ferrocene-quinone dyad with an amide space (Fc-Q) is employed to examine formation of the hydrogen bonding in the one-electron reduced form (Q•-) and the dynamics in the photoinduced electron-transfer reaction from the ferrocene to the quinone moiety. Photoexcitation of the Q moiety in Fc-Q in deaerated PhCN with 388 nm results in intramolecular electron transfer from Fc to the singlet excited state of Q to produce Fc+-Q•- without changing the conformation (<1 ps), followed by hydrogen bond formation with the amide proton of the spacer (τ =∼ 5 ps). The resulting radical ion pair decays via a back electron transfer to the ground state at a longer time scale with a rate constant of 2.6 × 10 8 s-1.

Original languageEnglish
Pages (from-to)6794-6795
Number of pages2
JournalJournal of the American Chemical Society
Volume124
Issue number24
DOIs
Publication statusPublished - 2002 Jun 19

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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