FLUORESCENCE OF EXCITED CHARGE-TRANSFER COMPLEXES AND ABSOLUTE DYNAMICS OF RADICAL-ION PAIRS IN ACETONITRILE

The absolute dynamics of the contact and the solvent-separated radical-ion pairs for a series of 2,6,9,10-tetracyanoanthracene acceptor/alkylbenzene donor systems have been determined in acetonitrile from a combined analysis of time-resolved excited charge-transfer emission and radical-ion pair absorption data and measurements of the quantum yields for formation of separated radical ions. Absolute rate data for the contact radical-ion pairs are obtained from time-resolved emission experiments. Absolute rate data for the solvent-separated radical-ion pairs are obtained for those cases in which the time-resolved emission is different from the time-resolved absorption.