Exciplex and radical pairs in photochemical electron transfer

Abstract

Photo induced electron transfer in polar solvents generates exci-plexes and radical pairs. The specific reactions of these intermediates have been studied for systems with pyrene as the primarily excited acceptor and various aromatic and aliphatic amines as electron donors by measuring exciplex decay times and by evaluating time-resolved extinction measurements carried out with and without an external magnetic field of 500 Gauss. The time-independent rate constants thus obtained yield detailed information on electron transfer in general. Their physical significance is discussed. © 1982, Walter de Gruyter. All rights reserved.