Abstract

A lot of work has been done on the kinetics of triphenyl methane molecules after electronic excitation. These molecules are of interest on account of their nonexponential relaxation behaviour on a picosecond time scale. In most cases two time constants fit the data quite well. Most of the theoretical models describe the biexponential relaxation by introducing an intermediate state which is asumed to be a state with different conformation. In this paper we present extensive time and frequency resolved studies, which show that biexponential relaxation may be explained by a subsequent vibrational heating of the molecules.

© 1988 Optical Society of America