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非手性对称液晶二聚体 CB7CB 在非手性向列相和手性扭曲向列相中的构象分布比较。

A comparison of the conformational distributions of the achiral symmetric liquid crystal dimer CB7CB in the achiral nematic and chiral twist-bend nematic phases.

机构信息

Centre RMN à Très Hauts Champs, CNRS/ENS Lyon/UCB-Lyon 1, Université de Lyon, 5 rue de la Doua, 69100 Villeurbanne, France.

出版信息

J Phys Chem B. 2013 May 30;117(21):6547-57. doi: 10.1021/jp4001219. Epub 2013 May 17.

DOI:10.1021/jp4001219
PMID:23634827
Abstract

The sets of residual dipolar couplings between carbon and hydrogen nuclei obtained from the proton-encoded (13)C 2D NMR experiment are used to investigate the conformational changes which occur when the achiral symmetric liquid crystal dimer CB7CB changes from the achiral nematic to the chiral twist-bend nematic phase. It is found that these changes are a consequence of the chirality of the twist-bend nematic phase, rather than being the driving force for the stability of this phase.

摘要

从质子编码的（13）C 2D NMR 实验获得的碳核和氢核之间的剩余偶极耦合集被用于研究当非手性对称液晶二聚体 CB7CB 从非手性向列相变为手性扭曲向列相时发生的构象变化。结果发现，这些变化是扭曲向列相的手性的结果，而不是该相稳定性的驱动力。

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