Photoinduced intramolecular electron-transfer reactions in carbazole-fullerene and phenothiazine-fullerene linked compounds in benzene and benzonitrile as studied by fluorescence, transient absorption, time-resolved EPR, and magnetic field effects

Hiroaki Yonemura, S. Moribe, K. Hayashi, M. Noda, H. Tokudome, Sunao Yamada, H. Nakamura

    Research output: Contribution to journalArticlepeer-review

    21 Citations (Scopus)

    Abstract

    Photoinduced intramolecular electron-transfer reactions in carbazole (Cz)-fullerene (C60) (Cz(8)C60) and phenothiazine (Ph)-C60 (Ph(n)C60 (n = 8, 10, 12)) linked compounds have been investigated in benzene and benzonitrile by fluorescence, transient absorption, and time-resolved electron paramagnetic resonance measurements, and by magnetic field effects on the decay rate constants of the photogenerated biradicals. In benzonitrile, photoinduced intramolecular electron transfer from Cz to the singlet excited state of C60 (1C60*) occurred in Cz(8)C60, but not to the triplet excited state (3C60*), while the intramolecular electron-transfer to both 1C60* and 3C60* occurred in Ph(n)C60 (n = 8, 10, 12). In benzene, on the other hand, no electron transfer to both 1C60* and 3C60* took place in all linked compounds. These results were interpreted in terms of the different Gibbs free energy changes in the two solvents.

    Original languageEnglish
    Pages (from-to)289-307
    Number of pages19
    JournalApplied Magnetic Resonance
    Volume23
    Issue number3-4
    DOIs
    Publication statusPublished - Jan 1 2003

    All Science Journal Classification (ASJC) codes

    • Atomic and Molecular Physics, and Optics

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