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Journal of Physical Chemistry, Vol.98, No.31, 7736-7740, 1994
Photoinduced Electron-Transfer Between C-60 and Polysilane Studied by Laser Flash-Photolysis in the Near-Ir Region
The photoinduced electron transfer between C-60 and a sigma-conjugated polysilane was investigated by laser flash photolysis in the near-IR region. The transient absorption spectra of C-60 triplet (C-3(60)*), C-60 radical anion, and the poly(methylphenylsilylene) radical cation were observed in the region 600-1600 nm in a polar solvent. The quenching rate constant kg of C-3(60)* corresponded well with the formation rate constant kappa(f) of the poly(methylphenylsilylene) radical cation. Direct electron transfer from poly(methylphenylsilylene) to C-3(60)* is suggested. The electron-transfer rate constants between C-60 and poly(methylphenylsilylene) showed the polar solvent effect and the local concentration effect of the polymer chain.
Keywords:PHOTOPHYSICAL PROPERTIES;TRANSIENT ABSORPTION;PULSE-RADIOLYSIS;CHARGE-TRANSFER;DOPED POLYMERS;C60;TRIPLET;C-70;FLUORESCENCE;FULLERENES