Chiral recognition based on the kinetics of ion transfers across liquid/liquid interface

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• 作者：Valentin Mirč ; eski ; Franç ; ois Quentel ; Maurice L’ ; Her
• 关键词：Stereoselectivity ; Chiral ions ; Ion transfer kinetics ; Three-phase electrodes
• 刊名：Electrochemistry Communications
• 出版年：2009
• 出版时间：June 2009
• 年：2009
• 卷：11
• 期：6
• 页码：1262-1264
• 全文大小：312 K

文摘

Three-phase electrodes in combination with square-wave voltammetry are applied to study the transfer kinetics of chiral anions from water to the chiral 2-octanol. The experimental system used consists of a pyrolytic graphite electrode partly modified with a thin film of one of the enantiomers of 2-octanol, which was immersed into an aqueous solution containing anions of chiral 2-chloropropionic acid, 2-bromopropionic acid, or lactic acid. It is demonstrated that the kinetics of the ion transfer is a stereoselective. The rate of the ion transfer is higher when uncomplimentary transferring ion–solvent chiral isomers are used, i.e., (R)-ion and (S)-solvent, or (S)-ion and (R)-solvent. To the best of our knowledge this is the first evidence for the difference in the ion transfer kinetics of chiral isomers across water/chiral organic solvent interface.