Photophysical and photochemical properties of C60 fine particle which was prepared by the reprecipitation method were examined by nanosecond laser flash photolysis. Triplet-triplet annihilation due to migration of triplet state within the fine particle was observed. Photoexcitation of the fine particle under the presence of electron donor resulted in photoinduced electron transfer. The reaction rate was one order smaller than that in solution suggesting interfacial electron transfer.
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