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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Enantiorecognition ability of different chiral selectors for separation of liquid crystals in supercritical fluid chromatography; critical evaluation
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Enantiorecognition ability of different chiral selectors for separation of liquid crystals in supercritical fluid chromatography; critical evaluation

机译：不同手性选择器在超临界流体色谱中分离液晶的映射能力; 关键评估

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摘要

Comprehensive study of enantioselective potential of eight different chiral stationary phases for chiral liquid crystal-forming molecules was conducted. The tested columns were: (i) polysaccharide-based Trefoil AMY1, CEL1 and CEL2 and (ii) superficially porous particles packed TeicoShell, VancoShell, TagShell, DMP-MaltoShell, and NicoShell. To test their enantioselective potential for these separations, twenty racemic mixtures of rod-like liquid crystalline materials comprising three different types of chiral centres and various other structural differences were used. Mobile phases consisting of supercritical carbon dioxide and alcohol as cosolvent were used; selected alcohols were methanol, ethanol and propan-2-ol. Effect of acidic and/or basic additives on enantioselectivity was also evaluated. Chiral stationary phases based on polysaccharides were found to have the greatest enantioselective potential for rod-like molecules that form liquid crystals, followed by TeicoShell, which proved suitable for enantioseparation of non-halogenated liquid crystals with lactic acid-based chiral centre. (C) 2020 Elsevier B.V. All rights reserved.
机译：进行了对手性液晶形成分子的八种不同手性固定阶段的映射潜力综合研究。测试的柱是：（i）基于多糖的三叶草Amy1，Cel1和Cel2和（ii）的表面多孔颗粒包装Teicoshell，Vancoshell，Tagshell，DMP-Maltoshell和Nicoshell。为了测试它们对这些分离的映射潜力，使用包含三种不同类型的手性中心和各种其他结构差异的棒状液晶材料的20个外消旋混合物。使用由超临界二氧化碳和醇组成的移动阶段作为共溶剂;选定的醇是甲醇，乙醇和丙烷-2-醇。还评价了酸性和/或碱性添加剂对对映选择性的影响。发现基于多糖的手性固定相对于形成液晶的棒状分子具有最大的对映选择性潜力，其次是Teicoshell，这被证明是与乳酸类手性中心的非卤代液晶的映对解性。 （c）2020 Elsevier B.v.保留所有权利。

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