Generation of long-lived radical ions through enhanced photoinduced electron transfer processes between [60]fullerene and phenothiazine derivatives

Yoshiko Sasaki, Yasuyuki Araki, Osamu Ito, Maksudul M. Alam

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Photoinduced electron transfer processes between fullerenes (C 60) and four phenothiazine derivatives (PTZs) in the absence and presence of hexylviologen dication (HV2+) have been studied by the transient absorption method in the visible and near-IR regions. Electron-transfer takes place from PTZs to the triplet states of fullerenes (3C60*) giving the radical anion of fullerenes (C60•-) and the radical cations of PTZs (PTZ •+). The rate constants and efficiencies of electron transfer are quite high, because of the high electron-donor abilities of PTZs as elucidated by their low oxidation potentials. On addition of HV2+ to the C60 and PTZ systems, the electron-mediating process occurs from C60•- to HV2+, yielding the viologen radical cation (HV•+). In the presence of a sacrificial donor, HV•+ persisted for a long time.

Original languageEnglish
Pages (from-to)560-565
Number of pages6
JournalPhotochemical and Photobiological Sciences
Volume6
Issue number5
DOIs
Publication statusPublished - 2007 Jan 1

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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