Photoinduced electron transfer from phthalocyanines to fullerenes (C60 and C70)

Tatsuya Nojiri, Maksudul M. Alam, Hideo Konami, Akira Watanabe, Osamu Ito

Research output: Contribution to journalArticlepeer-review

112 Citations (Scopus)

Abstract

Photoinduced electron transfer between fullerenes (C60 and C70) and phthalocyanines such as tetra-tertbutylphthalocyanine (H2TBPc) and its zinc derivative (ZnTBPc) in solution has been investigated with nanosecond laser photolysis method by observing the transient absorption bands in the visible/near-IR regions. By the predominant excitation of fullerenes with 532 nm laser light, slow rises of the transient absorption bands of phthalocyanine cation radicals and fullerene anion radicals were observed instead of the decays of the excited triplet states of fullerenes (TC60* and TC70*) in polar solvents. Electron-transfer from the phthalocyanines to TC60* or TC70* was confirmed. The quantum yield of the electron transfer via TC70* is higher than that via TC60*; ZnTBPc acts as stronger electron donor than H2TBPc. In nonpolar solvent, energy transfer from TC60* (and TC70*) to the phthalocyanines occurs predominantly as confirmed by the consecutive appearance of the triplet states of the phthalocyanines.

Original languageEnglish
Pages (from-to)7943-7947
Number of pages5
JournalJournal of Physical Chemistry A
Volume101
Issue number43
DOIs
Publication statusPublished - 1997 Oct 23

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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