Exciplex mechanism of the fluorescence quenching in polar media

Abstract

The formation of exciplexes (non-emitting or poorly emitting) is proposed as a cause of the deviations of the experimental data from the classical model of excited state electron transfer in polar solvents yielding radical ion pairs. Experimental evidences for the formation of such exciplexes are discussed. Simulation of the dependencies of the quenching rate constant vs. Gibbs energy of electron transfer according to the exciplex formation model confirms its consistence with the experimental data. © 1993, Walter de Gruyter. All rights reserved.