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PARAGRANJITA BHOWMIK, SHENGGANG LI, JASON F. FULLER, GRETCHEN K. ROTHSCHOPF, BRADFORD R. SOHNLEIN, XU WANG AND DONG-SHENG YANG, Department of Chemistry, University of Kentucky, Lexington, KY 40506-0055.
Gallium-amine complexes were produced by reactions of gallium atoms and methylamines seeded in helium or argon carrier gases. The Ga-NHn(CH3)3-n complexes have adiabatic ionization potentials of 39330, 38790, and 38081 cm-1 for n = 2, 1, and 0, respectively. The ZEKE spectrum of Ga-NH2CH3 exhibits 299 and 124 cm-1 vibrations in the ionic state and a 93 cm-1 vibration in the neutral state. In the case of Ga-NH(CH3)2, 864, 331, 206, and 132 cm-1 vibrations were measured for the ion, and 177 and 128 cm-1 vibrations for the neutral molecule. For Ga-N(CH3)3, the spectrum displays ionic vibrations of 785, 462, 188, and 111 cm-1 and a neutral vibration of 133 cm-1. Assignments of the observed vibrations will be discussed in comparison with theoretical calculations.