CONFORMATION-DEPENDENT INTRAMOLECULAR EXCIMER FORMATION IN JET-COOLED1,3-DIPHENYLPROPANE

Intramolecular excimer formation from photoexcited diarylalkanes in a supersonic beam has been studied, for the first time, using laser indu ced fluorescence, The results on 1,3-diphenylpropane demonstrate the p resence of four major ground-state conformations which display differi ng efficiency for the excimer formation. The conformation dependence o f the excimer formation allows tentative assignments of the species in terms of the four major rotational isomers expected for the molecule.