Analysis of the infrared emission and absorption spectra from isotopic CO molecules in solid -CO

Publication

Reference: Legay-Sommaire N., Legay F. (1982). Analysis of the infrared emission and absorption spectra from isotopic CO molecules in solid \ensuremathα-CO. Chem. Phys., 66, 315 - 325.

Names

Title: Analysis of the infrared emission and absorption spectra from isotopic CO molecules in solid \ensuremathα-CO
Abstract: Infrared emission and absorption spectra of CO isotopes suspended in solid \ensuremathα-CO at \ensuremath\approx 20 K have been analysed. Absorption measurements suggest that line intensities decrease going from gas to solid. Frequency measurements, in absorption and emission, show a red matrix shift which increases with vibrational excitation. Line shapes are gaussian with widths which increase slightly with vibrational excitation. A theoretical calculation of the matrix shift and lattice energy in terms of electrostatic, dispersive, induced and repulsive interactions gives a satisfactory agreement with the experimental data, provided that the dispersive and repulsive interaction parameters found in the literature are modified slightly. In the same way, the \ensuremathν dependence of the linewidths is explained in terms of electric interactions, but the agreement with experiment is less good, because it has not been possible to introduce repulsive interactions into the calculation.
Keywords: spectroscopy, far-IR, ices, molecular solids, CO
Content: spectral data

Doi

10.1016/0301-0104(82)88030-0

Identifiers