Molecular electronic energy transfer in bichromophoric molecules in solution and in a supersonic jet expansion

Abstract

We present preliminary results showing electronic energy transfer (EET) between benzene and biacetyl and between naphthalene and anthracene in a supersonic jet expansion and in bichromophoric molecules in solution. Excitation of several vibronic levels of benzene (donor) in the presence of biacetyl (acceptor) shows quenching of benzene emission with simultaneous appearance of biacetyl fluorescence emission with similar results for the pair naphthalene (donor) and anthracene (acceptor). The quenching follows Stern-Volmer kinetics as a function of added acceptor pressure, indicative of EET in a binary donor-acceptor complex. © 1992 Walter de Gruyter