VAN-DER-WAALS COMPLEXES OF THE BICHROMOPHORE SPIROBIFLUORENE

Van der Waals complexes of the bichromophore spirobifluorene with argo n, nitrogen, water, methanol, and acetonitrile were studied in a super sonic jet. The 1:1 complexes have two origin transitions which are shi fted to the red and to the blue of the bare bichromophore origin. Thes e spectral shifts are discussed in terms of the dispersive interaction s in a three-body cluster. Larger argon clusters are identified by bro ad features which are caused by the spectral overlap of many origin tr ansition. A model of vibronic coupling is suggested to explain the bro adened features in some of the spectra.