Journal of Chemical Physics, Vol.105, No.14, 5806-5816, 1996
Laser-Excited Fluorescence Study of Reactions of Excited Ca and Sr with Water and Alcohols - Product Selectivity and Energy Disposal
Reactions of the metastable P-3(J)0 states of Ca and Sr in atomic beams with H2O, D2O, and CH3OH yielding ground electronic state products have been observed by laser excited fluorescence of MOH, MOD, and MOCH(3). The water reactions favor metal hydroxide products while methanol reactions favor methoxides. For SrOH product, spectral simulation of the (B) over tilde(2) Sigma(+)-(X) over tilde(2) Sigma(+) transition based on coupled harmonic-oscillator Franck-Condon factors was used to determine crude vibrational energy distributions in the bending and metal-stretching modes, and simulation of a higher resolution scan of excitation of the ground vibrational level gave some information about the rotational energy distribution in that level. While excitation of metal stretching and rotation were considerable and not too far from the predictions of a prior model, bending was significantly colder. Limited spectroscopic constants and severe spectral congestion have precluded other successful simulations.
Keywords:REACTION CROSS-SECTION;CA-ASTERISK+ROH-)CAOH-ASTERISK+R R=CH3;RADICAL SIZE;CHEMILUMINESCENT REACTIONS;STATE DISTRIBUTIONS;MATRIX-ISOLATION;FERMI RESONANCE;SPECTROSCOPY;SYSTEM;C2H5