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Infrared spectra of diatomic polar molecules in rare-gas liquids. I. Spectral theory.
- Source :
- Journal of Chemical Physics; 9/15/1989, Vol. 91 Issue 6, p3435, 8p
- Publication Year :
- 1989
-
Abstract
- A theoretical model for the infrared (0–1) band of dilute solutions of diatomic polar molecules in nonpolar rare-gas liquids is presented. The model is based on decomposition of the rotational motion of the diatomic molecule into two limiting cases, according to the Bratos model: quasifree rotation and rotational diffusion. Contribution to the infrared absorption coefficient due to quasifree rotation is analyzed within a non-Markovian formalism using a stochastic directing intermolecular field (DIF) model to describe the diatomic molecule–solvent interaction. The P and R branches appear as a consequence of the quasifree contribution, which is also important in the Q-branch region. The contribution due to rotational diffusion is calculated making use of the Debye model and is mainly significant in the Q-branch region. [ABSTRACT FROM AUTHOR]
- Subjects :
- DIATOMS
SPECTRUM analysis
NOBLE gases
Subjects
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 91
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 7649960