Accession Number : AD0682245
Title : RADIATIVE AND RADIATIONLESS PROCESSES IN AROMATIC MOLECULES: PYRENE.
Descriptive Note : Technical rept.,
Corporate Author : TRW SYSTEMS REDONDO BEACH CALIF CHEMICAL SCIENCES DEPT
Personal Author(s) : Kropp,J. L. ; Dawson,W. R. ; Windsor,M. W.
Report Date : 30 OCT 1968
Pagination or Media Count : 20
Abstract : The fluorescence yield, triplet yield, and fluorescence lifetime for pyrene-h10 and pyrene-d10 have been measured as a function of temperature. The phosphorescence yield, and phosphorescence lifetime, have also been determined. However, in pyrene-d10 the fluorescence yield increases with increasing temperature, indicating that the rate constant for intersystem crossing has a temperature-dependent part. The variation of fluorescence lifetime and triplet yield with temperature for a pyrene-h10 is attributable in toto to a temperature-sensitive internal conversion; in pyrene-d10 both internal conversion and inter-system crossing are temperature-dependent and contribute to the observed variations. (Author)
Descriptors : (*POLYCYCLIC COMPOUNDS, *LUMINESCENCE), FLUORESCENCE, PHOSPHORESCENCE, EFFICIENCY, MOLECULAR ENERGY LEVELS, ELECTRON TRANSITIONS, RELAXATION TIME, AROMATIC COMPOUNDS
Subject Categories : Radiation and Nuclear Chemistry
Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE