INTERMOLECULAR VIBRATIONAL EXCITATIONS OF TETRACENE.(RARE GAS)1 HETEROCLUSTERS

In this paper we focus on the electronic-vibrational spectra of tetracene.A1 (A = Ar, Kr, Xe) heteroclusters, which provide information on the intermolecular nuclear motion of a rare-gas atom on the microsurface of a large aromatic molecule. Calculations of the energy levels and nuclear Franck-Condon factors for the excitation of the parallel and perpendicular intermolecular vibrations in the electronic S0 --> S1 excitation of heteroclusters were performed. The experimental energetic and intensity data for the perpendicular intermolecular nuclear excitation are well accounted for by our calculations.