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Photoexcitation dynamics of a pyrene-C60 dyad molecule has been investigated. From the excitation spectrum and fluorescence lifetime measurements, effective energy transfer processes from the singlet excited pyrene-moiety were confirmed both in polar and nonpolar solvents. The transient absorption suggested that the triplet excited C60 was generated effectively upon excitation of the pyrene-moiety via the singlet energy transfer and the intersystem crossing process.
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Fujitsuka et al. (2002) studied this question.
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