TGB A-ASTERISK STATE IN A HOMOLOGOUS SERIES OF DIARYLETHANE ALPHA-CHLOROESTER FERROELECTRIC LIQUID-CRYSTALS

被引：30

作者：

DIERKING, I ^{[1
]}

GIESSELMANN, F ^{[1
]}

ZUGENMAIER, P ^{[1
]}

机构：

[1] TECH UNIV CLAUSTHAL,INST PHYS CHEM,ARNOLD SOMMERFELD STR 4,D-38678 CLAUSTHAL ZELLERF,GERMANY

来源：

LIQUID CRYSTALS | 1994年 / 17卷 / 01期

关键词：

D O I：

10.1080/02678299408036546

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A twist grain boundary (TGB A*) or twisted smectic A* state was observed in two compounds of a homologous series of diarylethane alpha-chloroester ferroelectric liquid crystals. The phases have been characterized by optical polarizing microscopy and differential scanning calorimetry. Textures of the TGB A* state obtained by preparation on a glass slide and in thin homeotropically orienting liquid crystal cells or as free-standing films clearly show the helical structure, whereas preparation in homogeneously orienting LC cells suggests that the helical structure is suppressed by the cell geometry, in a similar way to that observed for S(C)* phases in the surface stabilized geometry (SSFLCs).

引用

页码：17 / 22

页数：6

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