FTIR overtone spectroscopy on surfaces. The C—O mode in chemisorbed methoxy on Ni(111)
✍ Scribed by Renato Zenobi; Jiazhan Xu; John T. Yates Jr.; B.N.J. Persson; A.I. Volokitin
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 508 KB
- Volume
- 208
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
We report the observation of a vibrational overtone for an adsorbate on a single crystal surface by high-resolution vibrational spectroscopy. A very weak absorption band at 20 17 cm-' is identified as the first overtone of the C-O stretching fundamental (at IO27 cm-') of . The anharmonic shift in the absence of dipole-dipole coupling and mechanical renormalization is determined to be 8.5 k 2 cm-', slightly smaller than that of the C-O stretching vibration in methanol, 12.5 cm-'. Surprisingly, no C-O bond weakening is found in CHsO-Ni( 111) compared to gas-phase methanol.