Coupling to Dipole-Forbidden Modes: CO on Pt(111) Studied by Infrared Spectroscopy
- 10 March 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 78 (10) , 1944-1947
- https://doi.org/10.1103/physrevlett.78.1944
Abstract
The metal-molecule stretch vibrational mode of CO chemisorbed in the structure on a Pt(111) surface at 100 K has been studied using infrared spectroscopy. For the bridge-bonded molecules the infrared absorption spectra reveal a doublet structure, which is assigned to a Fermi-resonance between the stretch mode and a combination of parallel, dipole-forbidden vibrational modes. Furthermore, no so-called antiabsorption connected to the frustrated rotation is detected, in contrast to what is found on close-packed copper surfaces.
Keywords
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