부산대학교 도서관

The temperature dependence and associated decay kinetics of the high energy band centered at 380 nm in the fluorescence spectrum of 1,6-diphenyl-1,3,5-hexatriene in a nonpolar solvent were investigated. Below 150 K the emission intensity at 380 nm relative to that of a sharp band near 400 nm was very small. Above this temperature the intensity at 380 nm increased with increasing temperature. The fluorescence decay analysis of this band showed two components with decay times of 62 ps and 13.4 ns. The 62 ps component was assigned to the prompt fluorescence of the S2 (1Bu*) state and 13.4 ns component to a delayed type fluorescence from the same state after establishment of a thermal equilibrium with lower S1 (1Ag*) state.