Photoinduced electron transfer between C60/C70 and zinc tetraphenylporphyrin in polar solvents

Tatsuya Nojiri, Akira Watanabe, Osamu Ito

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77 Citations (Scopus)

Abstract

Photoinduced electron transfer between C60/C70 and zinc tetraphenylporphyrin (ZnTPP) in a polar solvent has been investigated with a nanosecond laser photolysis method by observing the transient absorption bands in the near-IR region. The transient absorption bands of the C60/C70 radical anion (C60.-/C70.-) in the near-IR region gave evidence of electron transfer for the system ZnTPP and C60/C70. In ZnTPP solution where C60 and C70 were photoexcited predominantly, electron transfer takes place from the ground state of ZnTPP to the triplet states of C60/C70 (3C60*/3C70*). In the concentrated ZnTPP solution where ZnTPP was predominantly photoexcited, the triplet state of ZnTPP donates the electron to the ground state of C60/C70, producing C60.-/ C70.-. The efficiency of electron transfer via the 3C60*/3C70* route is higher than that via 3ZnTPP*.

Original languageEnglish
Pages (from-to)5215-5219
Number of pages5
JournalJournal of Physical Chemistry A
Volume102
Issue number27
DOIs
Publication statusPublished - 1998 Jul 2

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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