COLL 143 |
| Francisco Zaera, Department of Chemistry, Department of Chemistry, University of California, Riverside, CA 92521 |
| Examples from our laboratory on applications of infrared spectroscopy to the characterization of surface species in non-vacuum environments will be presented. In one, the adsorption of cinchona chiral modifiers from solution onto platinum catalytic surfaces is detailed by studies using in-situ reflection-absorption infrared spectroscopy (RAIRS) at the liquid-solid interface. Parameters such as adsorption geometry, reversibility of adsorption, and the effect of gases and solvents were investigated, and the adsorption behavior was correlated to catalytic properties. A second example deals with RAIRS studies of porphyrin self-assembled layers on gold and silicon surfaces. In this case a correlation was established between adsorption geometry and electrical properties as they apply to the design of molecular memory devices. In a final case, the characterization of palladium-supported catalysts for environmental uses is performed by transmission infrared spectroscopy, using carbon monoxide as a probe for the oxidation state of the metal after different treatments. |
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Vibrational Analyses of Dry and Wet Surfaces
2:00 PM-5:45 PM, Monday, March 29, 2004 Marriott -- Grand Ballroom H, Oral
Division of Colloid and Surface Chemistry |