Luminescence characteristics of lysergic acid diethylamide and related ergolines

Abstract

The fluorescence and phosphorescence characteristics of lysergic acid diethylamide and a number of related ergolines have been examined. Fluorescence decay times have been determined using a time-correlated single photon counting technique. Pronounced changes were observed in the fluorescence spectra and decay times with change of solvent. These effects have been attributed to the change in both the dielectric constant of the solvent and the extent of dipole–dipole interaction in the excited state.