Control of reaction course of the excited state of charge-transfer complexes by the free energy of backward electron transfer

Abstract

Selective excitation of charge-transfer (CT) complexes between acenaphthylene and various electron acceptors gives net reaction products when the resulting radical ion pairs lie at sufficiently higher energy than the ground state (large –ΔG_BET); however, with decrease of –ΔG_BET, these tend to become less reactive and finally non-reactive.