AN ENHANCED ODD EVEN EFFECT OF LIQUID-CRYSTAL DIMERS ORIENTATIONAL ORDER IN THE ALPHA,OMEGA-BIS(4'-CYANOBIPHENYL-4-YL)ALKANES

被引：152

作者：

BARNES, PJ ^{[1
]}

DOUGLASS, AG ^{[1
]}

HEEKS, SK ^{[1
]}

LUCKHURST, GR ^{[1
]}

机构：

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

来源：

LIQUID CRYSTALS | 1993年 / 13卷 / 04期

关键词：

D O I：

10.1080/02678299308026332

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The odd-even behaviour observed for liquid crystal dimers has been predicted to be a sensitive function of the geometry of the link joining the mesogenic groups to the flexible spacer. Here we report the synthesis of two cyanobiphenyl dimers with methylene links, together with a determination of their transitional properties. In particular we have probed their orientational order via the major and biaxial orientational order parameters of a solute molecule, anthracene-d10, using NMR spectroscopy. For comparison we have also determined the corresponding quantities for the cyanobiphenyl dimers with ether links. The enhanced odd-even effect observed for the methylene linked dimers relative to those with ether links is in good accord with theory.

引用

页码：603 / 613

页数：11

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