			15min:

A HIGH RESOLUTION ELECTRONIC SPECTRUM OF THE PARA -DIFLUOROBENZENE/WATER COMPLEX .

CHEOLHWA KANG AND DAVID W. PRATT, Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260.

The rotationally resolved S₁ leftarrow S₀ fluorescence excitation spectrum of para -difluorobenzene ( p DFB) / water complex has been observed. The water complex appears 169 cm^-1 to the blue of the bare molecule origin and is split into two spectra separated by 0.12 cm^-1 .These spectra are a result of the internal rotation of the water molecule in the complex. Analyses of the bands show that the water molecule lies in the ab plane of the p DFB molecule. The possible types of water motion will be discussed.