Competitive chemisorption between pairs of cinchona alkaloids and related compounds from solution onto platinum surfaces.
Quinoline-derived compounds exhibit the following relative chemisorption strengths from CCl4 solutions onto platinum surfaces, as determined by in-situ infrared spectroscopy: quinine, quinidine > cinchonidine > cinchonine > 6-methoxyquinoline > lepidine > quinoline. This sequence explains nonlinear enantioselectivity effects with cinchona chiral modifiers in hydrogenation catalysis.
Ma
Zhen
Z
Department of Chemistry, University of California, Riverside, CA 92521, USA.
Zaera
Francisco
F
D000327:Adsorption; D001667:Binding, Competitive; D002930:Cinchona Alkaloids / Q000737:chemistry*; D015394:Molecular Structure; D010984:Platinum / Q000737:chemistry*; D012680:Sensitivity and Specificity; D012996:Solutions / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013237:Stereoisomerism; D013499:Surface Properties
D002930:Cinchona Alkaloids; D012996:Solutions; D010984:Platinum