Characterization of the Giant Transient Dipole Generated by Photoinduced Electron Transfer in a Carotene-Porphyrin-Fullerene Molecular Triad

Sergei N. Smirnov, Paul A. Liddell, Ivan V. Vlassiouk, Alexey Teslja, Darius Kuciauskas, Charles L. Braun, Ana Moore, Thomas Moore, Devens Gust

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Excitation of a carotenoid (C) porphyrin (P) fullerene (C60) molecular triad yields the poiphyrin first excited singlet state, C- 1P-C60, which decays via a sequential two-step photoinduced electron-transfer process into a C•+-P-C 60•- charge-separated state with a lifetime of 340 ns in 2-methyltetrahydrofuran solution. The transient dc photocurrent method has been used to investigate the dipole moment of the charge-separated state in tetrahydrofuran and 2-methyltetrahydrofuran. The results show formation of a giant dipole with a moment in excess of 150 D, corresponding to separated charges located on the fullerene and carotene moieties of the triad.

Original languageEnglish (US)
Pages (from-to)7567-7573
Number of pages7
JournalJournal of Physical Chemistry A
Issue number38
StatePublished - Sep 25 2003


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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