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FUMIE X. SUNAHORI, XIAOPENG ZHANG AND DENNIS J. CLOUTHIER, Department of Chemistry, University of Kentucky, Lexington, KY 40506-0055.
The electronic spectrum of the jet-cooled copper hydrosulfide molecule has been observed for the first time by pulsed electric discharge and laser-induced fluorescence techniques. High resolution studies of the 000 bands of the A 1A'' - X 1A' transition of CuSH and its various isotopomers (65CuSH, 63CuSD, and 65CuSD) have allowed us to obtain the excited state molecular structure and refine the previously reported ground state structure. Single vibronic level emission spectra have also been recorded to measure the ground state vibrational frequencies. Some of the excited state vibrational frequencies have been obtained from an analysis of the vibronic structure in the LIF spectra. Ab initio Franck-Condon simulations of the absorption and emission spectra are in accord with experiment.