A new approach to study of solvent effect on intramolecular electron transfer
An electron-transfer process in a porphyrin-quinone model compound was studied by steady-state and nanosecond time-resolved fluorescence spectroscopy in thirteen solvents with different polarity (es values ranged from 4.3 to 46.7). Electron-transfer rate constants (ket) and fluorescence quenchings were strongly dependent on the polarity of solvents. The parabolic dependence of ln ket on optical and static dielectric constant term (1/eop − 1/es) was observed for applied solvents.