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g+ AND EXCITED Ã 1B1 STATES OF JET-COOLED LIOLI ("LITHIATED WATER").
D. BELLERT, DARIN W. WINN AND W. H. BRECKENRIDGE, Department of Chemistry, University of Utah, Salt Lake City, Utah 84112.
Various laser based spectroscopies, including R2PI (Resonance Two-Photon Ionization), LIF (Laser-induced Fluorescence), DF (Dispersed Fluorescence), and SEP (Stimulated Emission Pumping) have been utilized to determine several vibrational and rotational constants for the ground (X 1
g+) and first singlet excited state (Ã 1B1) of 7Li16O7Li. From analysis of SEP spectra to (
1,
2\ell,
3 = 0) vibrational states, the 7Li16O7Li ground state is confirmed to be linear, with a bond length (R0) of 1.611 \underline+ 0.005 Å. The 1B1 excited state is bent, with a bond angle of approximately 105\circ, and a bond length (R0) of approximately 1.84 Å. These geometries are consistent with ab initio estimates, and with the idea that the bonding in both these states is essentially ionic (Li+1O-2Li+1 and Li+1/2O-1Li+1/2, respectively).