COLL 491 |
| Francisco Zaera, Zhen Ma, and Jun Kubota. Department of Chemistry, University of California, Riverside, CA 92521 |
| Heterogeneous hydrogenation catalysts such as platinum can be made enantioselective by the use of molecular modifiers. In particular, alpha-ketoesters can be selectively hydrogenated by cinchona-modified platinum catalysts to produce the corresponding optically-pure (R)- or (S)-alpha-hydroxoesters. In these, the adsorption details of the modifier appears to be critical to the performance of the catalyst. Here we report on in-situ infrared studies on the adsorption of cinchona modifiers from the liquid phase onto platinum surfaces. A number of properties were probed, including the effects of concentration and solvent on the adsorption. |
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Chiral Surfaces
Division of Colloid and Surface Chemistry |