Abstract
The absorption and emission spectra of anethole trithione in various solvents were studied. In methylcyclohexane, an (n→π*) absorption band was clearly observed in the longer wavelength region. It was postulated that anethole trithione emits fluorescence from the S2(1(π, π*)) state on the basis of the positions of its maxima and excitation spectra. Judging from the solvent effect on the phosphorescence spectra and the lifetimes, the phosphorescence was assigned as (π*→n). The intensity ratio of fluorescence and phosphorescence was larger in methylcyclohexane than in MeOH. This phenomenon is explained using energy level diagrams.
