Dispersed fluorsecence spectroscopy of AINi, NiAu, and PtCu

Dispersed fluorescence studies of AlNi, NiAu, and PtCu have been performed, providing spectroscopic information about the ground and low-lying excited electronic states. Vibrational frequencies are reported for the ground X 2?5/2 state of all three molecules. In the case of AlNi, fluorescence to all five of the states originating from the 3dNi 9 3sAl2?2 manifold has been observed. For both NiAu and PtCu, fluorescence to two low-lying excited states in addition to the ground state was observed. Relative energies, vibrational constants, and, when possible, V values of these states are reported. Comparisons of the measured electronic states to the predictions of a ligand-field plus spin?orbit model are also provided, along with a comparison of the electronic structure of PtCu to that of PtH.