Liquid-crystalline properties of dissymmetric molecules part 3: Smectic properties of 4-[2-(perfluoroalkyl) ethoxy]-substituted nitrobenzenes and benzonitriles

被引：31

作者：

Duan, M ^{[1
]}

Okamoto, H ^{[1
]}

Petrov, VF ^{[1
]}

Takenaka, S ^{[1
]}

机构：

[1] Yamaguchi Univ, Fac Engn, Dept Adv Mat Sci & Engn, Ube, Yamaguchi 7558611, Japan

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1999年 / 72卷 / 07期

关键词：

D O I：

10.1246/bcsj.72.1637

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This paper describes the thermal properties of some homologs of 4- and 3-[2-(perfluoroalkyl)ethoxy]-substituted nitrobenzenes and benzonitriles. Many of the homologs show notable smectic properties involving smectic A and B phases. The smectic structures were characterized by an X-ray diffraction examination. The smectic A phase has a partially interdigitated bilayer arrangement where the layer spacing is 1.2-1.8 times the calculated molecular length. Interestingly, some homologs show a smectic B phase with a layer spacing of 2 times the calculated molecular length. Both fluorophilic and polar interactions are supposed to play important roles for the molecular arrangements.

引用

页码：1637 / 1642

页数：6

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