Magnetic field effects on the decay rates of triplet biradical photogenerated from intramolecular electron-transfer in a zinc- tetraphenylporphyrin-fullerene linked compound

Hiroaki Yonemura, Hideki Nobukuni, Shinya Moribe, Sunao Yamada, Yoshihisa Fujiwara, Yoshifumi Tanimoto

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21 Citations (Scopus)

Abstract

Transient absorption spectra of a zinc-tetraphenylporphyrin(ZnP)- fullerene(C60) linked compound with flexible eight methylene groups indicated that intramolecular electron-transfer occurred in benzonitrile, while not in toluene. In benzonitrile, the decay rate constant of biradical decreases quickly in lower magnetic fields (<0.1 T), and then increases gradually and finally become almost constant in higher magnetic fields (0.1≤H≤1.2 T). The magnetic field effects (MFEs) verified that the triplet biradical was generated from the intramolecular electron-transfer of the triplet-excited states of ZnP and C60. The reverse phenomenon of the MFEs around 0.1 T is most likely ascribed to the properties of C60 moiety.

Original languageEnglish
Pages (from-to)417-422
Number of pages6
JournalChemical Physics Letters
Volume385
Issue number5-6
DOIs
Publication statusPublished - Feb 16 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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