Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 307, Issue 2, Pages 481-487Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2006.12.001
Keywords
modified cyclodextrins; hydroformylation; Tsuji-Trost; adsorption; surface excess; surface tension; molecular area
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Methylated and hydroxylpropylated cyclodextrins (CDs) are highly efficient mass transfer promoters in biphasic aqueous organometallic processes. The surface tension measurements demonstrated that these CDs adsorb at air-water interface and allowed to determine surface excess of CD by using Gibbs adsorption equation. Interestingly, a good correlation between surface excess and catalytic activity was obtained in the case of hydroformylation and Tsuji-Trost reactions. These results point out the importance of CD adsorption at the interface in biphasic aqueous organometallic processes. (c) 2006 Elsevier Inc. All rights reserved.
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