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聚γ-苄基-L-谷氨酸酯(PBLG)和聚γ-苄基-D-谷氨酸酯(PBDG)液晶相中对映体的非对映异构取向有何不同:一个案例研究。

How different are diastereomorphous orientations of enantiomers in the liquid crystalline phases of PBLG and PBDG: a case study.

作者信息

Marx Andreas, Schmidts Volker, Thiele Christina M

机构信息

Technische Universität Darmstadt, Clemens Schöpf Institut für Organische Chemie und Biochemie, Petersenstr. 22, 64287 Darmstadt, Germany.

出版信息

Magn Reson Chem. 2009 Sep;47(9):734-40. doi: 10.1002/mrc.2454.

DOI:10.1002/mrc.2454
PMID:19504463
Abstract

The orientational properties of the two enantiomers of an example compound, namely isopinocampheol [(+)- and (-)-IPC] in the two enantiomers of a liquid crystalline phase, namely Poly-gamma-benzyl-L/D-glutamate (PBLG/PBDG) with the organic cosolvent CDCl(3), were investigated. The interactions can be either enantiomorphous, leading to equal orientations and residual dipolar couplings (RDCs), or diastereomorphous, leading to different orientations and RDCs. The difference between the two diastereomorphous orientations was determined to be rather small (5 degrees in the Euler angle beta). Furthermore, we investigated whether one of the two diastereomorphous interactions is favored.

摘要

研究了一种示例化合物(异松蒎醇[(+)-和(-)-IPC])的两种对映体在一种液晶相(聚-γ-苄基-L/D-谷氨酸酯(PBLG/PBDG))与有机共溶剂CDCl₃的两种对映体中的取向性质。相互作用可以是对映形态的,导致相同的取向和残余偶极耦合(RDCs),也可以是非对映形态的,导致不同的取向和RDCs。两种非对映形态取向之间的差异被确定相当小(欧拉角β中为5度)。此外,我们研究了两种非对映形态相互作用中是否有一种更受青睐。

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