THE ANGLE OF TWIST BETWEEN THE 2 PHENYL RINGS IN THE NEMATIC LIQUID-CRYSTAL 4-NORMAL-PENTYL-4'-CYANOBIPHENYL

被引：33

作者：

CELEBRE, G ^{[1
]}

LONGERI, M ^{[1
]}

SICILIA, E ^{[1
]}

EMSLEY, JW ^{[1
]}

机构：

[1] UNIV SOUTHAMPTON,DEPT MED,SOUTHAMPTON SO9 5NH,HANTS,ENGLAND

来源：

LIQUID CRYSTALS | 1990年 / 7卷 / 05期

关键词：

D O I：

10.1080/02678299008036754

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The NMR spectrum of the protons in the biphenyl group of 4-n-pentyl-4′-cyanobiphenyl (5CB), was obtained by Sinton et al. (1984, Molec, Phys., 53, 333) and analysed by them to give an angle of twist, φmin, between the normals to the two phenyl rings of 30 ± 2°. Their analysis made the assumption that V(φ), the potential for rotation about the inter ring bond, is such that only the structures with the minimum energy need be considered when calculating averaged dipolar couplings. Re-analysis of their data by a method which allows for the whole of V(φ) to be sampled when averaging the dipolar couplings yields a value for φmin of 38.4 ± 0.1°. © 1990 Taylor & Francis Group, LLC.

引用

页码：731 / 737

页数：7

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