Kinetic and standard thermodynamic parameters of photoinduced charge separation reactions in a bichromophoric anthracene-containing molecule from time-resolved fluorescence measurements in different solvents and solvent mixtures and at different temperatures

Abstract

The determination of kinetic and standard thermodynamic parameters (reorganization energies, electronic coupling elements, free energy, enthalpy and entropy changes) of intramolecular photoinduced charge separation reactions in ω-(10-Phenyl-9-anthryl)propiophenone from the analysis of biexponential fluorescence decay curves exhibits distinct differences between the electronic factors in aprotic (benzene, acetonitrile, and mixtures thereof) and protic (methanol, ethanol) solvents and an unexpectedly small variation of the standard free energy change with solvent polarity.