Absolute Infrared Intensities of the Fundamental Absorption Bands in Solid CO_2 and N_2O

Publication

Reference: Yamada Haruka, Person Willis B. (1964). Absolute Infrared Intensities of the Fundamental Absorption Bands in Solid CO$_2$ and N$_2$O. J. Chem. Phys., 41, 2478 - 2487.

Names

Title: Absolute Infrared Intensities of the Fundamental Absorption Bands in Solid CO$_2$ and N$_2$O
Abstract: Absolute infrared intensities of the fundamental vibrations of CO$_2$ and N$_2$O have been measured in polycrystalline solid films. The path length has been measured by observing interference fringes. In contrast with CS$_2$, the results for the solid phase do not agree exactly with those predicted from the gas phase values, using only the simple "field-effect" correction. In particular the intensity in the solid is less than that in the gas phase for v$_1$ and v$_3$ of N$_2$O and for v$_3$ of CO$_2$, whereas the "field-effect" predicts an increase in intensity. However, the observed changes in intensity are relatively small. The predicted frequency shifts also do not agree with the observed values, indicating that other effects are important. Bond moment parameters are presented. The bond moment μ is the same as in the gas phase, but the derivative, $\partial\μ/\partialr$, decreases by about 25%. Some incomplete studies of the intensities in mixed crystals of N$_2$O and CO$_2$ are presented.
Keywords: spectroscopy, transmission spectra, mid-IR, band position, band intensity, band vibration mode, ices, molecular solids, amorphous, crystalline, CO2, N2O
Content: spectral data, band list data, experimental physics

Doi

10.1063/1.1726291

Identifiers