期刊
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
卷 82, 期 3, 页码 304-312出版社
WILEY
DOI: 10.1002/jctb.1673
关键词
ionic liquid; ion hydration; nuclear magnetic resonance (NMR) relaxation; kosmotropicity; enzyme; enantioselectivity; Hofmeister series
The nuclear magnetic relaxations of water in ionic-liquid (IL) solutions were examined at various IL concentrations in order to better understand their hydration behaviors (in terms of nuclear magnetic resonance (NMR) B'-coefficients). From these B'-values of ILs, the individual ion's B'-coefficients were further calculated based on the additivity. These coefficients represent the hydration behavior (`kosmotropicity') of ILs in aqueous solutions. Using these data, a linear correlation was found between enzyme enantioselectivity in aqueous solution and the delta' parameter (difference in NMR B'-coefficients of anion and cation). In general, high enzyme enantiomeric ratios (E) could be achieved in solutions of ILs with high delta' values. (c) 2007 Society of Chemical Industry
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