Abstract

Extremely useful connections exist between the dynamics of adsorbed molecules and their vibrational spectra, as revealed in optical absorption spectroscopy. These connections have been nicely established by Noid et al. [ J. Chem. Phys. 67, 404 ( 1977)]. The present study has been motivated by recent experiments suggesting that CO adsorbed on Pt(111) shows evidence for conversion between twofold and threefold symmetric adsorption sites. The role of multiple wells along a reaction coordinate (hindered translations) in determining the vibrational spectrum of an internal mode (intramolecular stretch) anharmonically coupled to the hindered translation is investigated.

© 1987 Optical Society of America

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