Direct Evidence of Photoinduced Charge Transfer from Alternating Copolymer to Buckminsterfullerene

Fluorescence quenching of the alternating copolymer (TPA-PAV) obtained from triphenylamine dialdehyde and the 1,10-anthrylene di-ylide Wittig reagent has revealed exciplex formation by intramolecular charge transfer state of TPA-PAV and C60 in benzene solution. The formation of the exciplex may result in an irreversible photochemical reaction. The photoinduced charge transfer from TPA-PAV to C60 was investigated. Furthermore, ESR signals of the C60 anion radical were observed.