ELECTRONIC-SPECTRA OF JET-COOLED TROPOLONE-H2O CLUSTERS

The S-1-S-0 fluorescence excitation and dispersed fluorescence spectra of jet-cooled tropolone-(H2O)(n) (n = 1-3) have been measured to inve stigate the effects of the solvation by water on proton tunneling. Thr ee intermolecular vibrational modes have been observed in the disperse d fluorescence spectrum, Ab initio calculations suggest that two stabl e conformers exist for tropolone-(H2O)(1). The structure of tropolone- (H2O)(1) has been discussed by comparing the observed and calculated v ibrational frequencies.