Normal Unenhanced Raman Spectra of CO and CH4 Adsorbed on Cobalt(poly) |
| |
Authors: | H. A. Marzouk E. B. Bradley K. A. Arunkumar |
| |
Affiliation: | 1. Department of Electrical , Engineering University of Kentucky , Lexington, Kentucky , 40506–0046;2. Appollo Lasers Inc. , 9201 Independent Ave., Chatsworth, CA, 91311 |
| |
Abstract: | Abstract Normal unenhanced Raman spectra (NURS) of low-polarizability CO molecules were observed for the first time on cobalt at R. T. and residual gas pressure. We assign five bands observed between 2030–2130 cm?1 to linear chemisorbed CO species, while those observed between 1840–2010 cm?1 have been ascribed to the 2-fold chemisorbed species. The three bands observed between 1740–1830 cm?1 we believe are due to the 3-fold species. The corresponding fourteen Co-C stretches were observed and assigned. A model based upon electron backdonation is proposed for each of the three structures. NURS were also observed at R. T. for physisorbed CH4 and assignments are made to the four frequencies of CH4. |
| |
Keywords: | Raman Cobalt(poly) |
|
|