Photoinduced electron transfer and electron-mediating systems of [60]fullerene and triphenylamine derivatives in the presence of viologen dication in polar solvent

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

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1 Citation (Scopus)

Abstract

Photoinduced electron-transfer processes between fullerenes (C 60) and three triphenylamines (TPA's) including bis(tolylaminophenyl) cyclohexane in the absence and presence of hexylviologen dication (HV 2+) and 1-benzyl-1,4-dihydronicotinamide (BNAH) have been studied by the transient absorption method in the visible and near-IR regions. Electron-transfer takes place initially from TPA's to the triplet states of fullerenes (3C60*), giving the radical anions of fullerenes (C60.-) and the radical cations of TPA's (TPA.+). The rate constants and efficiencies of electron transfer are quite high, because of the high electron-donor abilities of TPA's as their low oxidation potentials indicate. On addition of HV2+ to the C 60 and TPA systems, the electron-mediating process from C 60.- to HV2+ occurs, yielding the viologen radical cation (HV.+). In the further addition of BNAH, which acts as a sacrificial donor, steady-state concentration of HV.+ was accumulated during continuous photoirradiation and persisted for a long time.

Original languageEnglish
Pages (from-to)93-100
Number of pages8
JournalJournal of the Chinese Chemical Society
Volume53
Issue number1
DOIs
Publication statusPublished - 2006 Feb

Keywords

  • Electron mediating
  • Electron transfer
  • Laser photolysis
  • Triphenylamines
  • [60]fullerene

ASJC Scopus subject areas

  • Chemistry(all)

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