Experimental determination of the low-lying excited A states of trans-stilbene

Abstract

The low-lying A states of trans-stilbene are investigated by means of two-photon excitation spectroscopy. The exptl. findings are compared with theor. results. From the combined information of one- and two-photon spectroscopy, were assigned at least seven excited singlet states in the energy range below 50,000 cm-1. The newly obtained information is discussed with regard to the mechanism proposed for the photoisomerization of stilbene.