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Chiral separation of mandelic acid enantiomers using an aqueous two-phase system based on a thermo-sensitive polymer and dextran

机译:基于热敏聚合物和葡聚糖的含水两相系统使用两相系统的手性分离

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In this study, a thermo-sensitive polymer Poly(MAH-beta-CD-co-NIPAAm) was synthesized by the copolymerization of N-isopropylazylamide (NIPAAm) with the maleic anhydride (MAH) modified beta-cyclodextrin (beta-CD). This polymer was both used as chiral selector and phase-forming component of aqueous two-phase system (ATPS). ATPS formed by Poly(MAH-beta-CD-co-NIPAAm) and dextran T40 was used for chiral separation of mandelic acid (MA) enantiomers. The influencing parameters of the distribution behavior of MA were studied, viz. concentration of thermo-sensitive polymer, pH, operational temperature, and initial MA concentration. The results showed that this chiral selector preferentially recognizes the (S)-enantiomer rather than the (R)-enantiomer, the maximum separation factor (cc) can reach to 1.27 under the optimum conditions. The thermo-sensitive polymer can be recycled by heating and centrifugation after enantioseparation. This ATPS is a simple, green and economical approach for the chiral separation of MA and other chiral enantiomers. (C) 2016 Elsevier B.V. All rights reserved.
机译:在该研究中,通过用马来酸酐(MAH)改性的β-环糊精(β-CD)共聚,通过N-异丙基氨基酰胺(NIPAAM)共聚合成热敏聚合物聚(MAH-BETA-CD-CO-COIPAAM)。该聚合物均用作水性两相系统(ATP)的手性选择器和相成分组分。由聚(MAH-BETA-CD-CO-NIPAAM)和葡聚糖T40形成的ATP用于伪生酸(MA)对映体的手性分离。研究了MA的分布行为的影响参数,VIZ。热敏聚合物浓度,pH,操作温度和初始MA浓度。结果表明,该手性选择器优先识别(S) - 蒽酰甲,而不是(R) - 蒽酸,最大分离因子(CC)可以在最佳条件下达到1.27。热敏聚合物可以通过加热和映对后离心再循环。该ATP是一种简单,绿色和经济的方法,用于MA和其他手性对映体的手性分离。 (c)2016年Elsevier B.v.保留所有权利。

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