RESONANT 2-PHOTON IONIZATION SPECTROSCOPY OF C6H6-(SF6)1,2

Vibrationally resolved electronic spectra of heteroclusters C6H6-SF6 a nd C6H6-(SF6)2 were studied in the spectral regions near the S0-S1, 0( 0)0 and 6(0)1 transitions of the benzene monomer. A nonvanishing 0(0)0 vibrational band has been observed for C6H6-SF6 with a C3v symmetry. For both clusters we have determined the ionization potentials as well as the binding energies in the electronic ground state and the ioniza tion state. The fragmentation of larger clusters (C6H6)n(SF6)m is rest ricted to the loss of SF6 molecules while the emission of C6H6 molecul es have not been observed.