Photoinduced electron transfer reactions between C60 and poly(N- vinylcarbazole) (PVCz) in polar benzonitrile solution have been investigated by observing the transient absorption bands in the visible and near-ir regions. When C60 was photoexcited, the electron transfer reaction occurred via both 3C60/* and 1C60/*. In the case of the reaction via 3C60/*, electron transfer rate constant was 5.1 x 106 M-1 s-1, which is larger than that of the reaction between 3C60/* and EtCz by a factor of 7.5, indicating a stabilization of cation radical of carbazole in PVCz. Electron transfer reactions via 1C60/* proceeded at the diffusion- controlled rate, while the quantum yield for electron transfer is not high. When PVCz was photoexcited, direct photo-ejection occurred from PVCz yielding PVCz - + and solvated electron, in which the latter was captured by C60. Electron transfer from 3PVCz* to C60 was also pointed out as a charge generation mechanism.
- Photoinduced electron transfer
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry