A color center laser spectrometer along with velocity modulation detection was used to record the absorption spectrum of H2O+ produced in an AC glow discharge between 3180 and 3390 cm-1 with a gas mixture of He/H2O. The predominant role of the reaction of metastable helium with H2O has been observed. The H2O+ ion is also present in the spectra recorded between 3 100 and 3600 cm-1 with a gas mixture of He/H2/02 and some features are illustrated. The nu1 and nu2 + nu3 - nu2 bands have been assigned and the previous analysis of the nu3 band [J. Mol. Spectrosc. 127, 1 (1988)] has been extended. The nu1 and nu3 states have been fitted together taking into account the vibration-rotation interaction. The molecular constants have been obtained for the nu1 and nu2 + nu3 states and they have been improved in the case of the nu3 and the ground vibrational states. The equilibrium structure has been derived [r(e) = 0.9992(6) angstrom, theta(e) = 109.30(10)-degrees] and the quadratic and cubic force field constants have been evaluated.
INFRARED-SPECTROSCOPY AND EQUILIBRIUM STRUCTURE OF H2O+(X)2B1)
1992
Abstract
A color center laser spectrometer along with velocity modulation detection was used to record the absorption spectrum of H2O+ produced in an AC glow discharge between 3180 and 3390 cm-1 with a gas mixture of He/H2O. The predominant role of the reaction of metastable helium with H2O has been observed. The H2O+ ion is also present in the spectra recorded between 3 100 and 3600 cm-1 with a gas mixture of He/H2/02 and some features are illustrated. The nu1 and nu2 + nu3 - nu2 bands have been assigned and the previous analysis of the nu3 band [J. Mol. Spectrosc. 127, 1 (1988)] has been extended. The nu1 and nu3 states have been fitted together taking into account the vibration-rotation interaction. The molecular constants have been obtained for the nu1 and nu2 + nu3 states and they have been improved in the case of the nu3 and the ground vibrational states. The equilibrium structure has been derived [r(e) = 0.9992(6) angstrom, theta(e) = 109.30(10)-degrees] and the quadratic and cubic force field constants have been evaluated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
