Synthesis of thermotropic liquid crystals derived from phenylpiperazine containing an enyne unit

被引：0

作者：

Gallardo, H ^{[1
]}

Maurmann, L ^{[1
]}

机构：

[1] Univ Fed Santa Catarina, Dept Chem, BR-88040900 Florianopolis, SC, Brazil

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2002年 / 378卷

关键词：

phenylpiperazine; enyne; Schiff base;

D O I：

10.1080/713738578

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Thermotropic liquid crystals are of great technological importance. Much research is devoted to the development of stable compounds with transition temperatures close to room temperature. The interest of this work is the synthesis of thermotropic liquid crystal precursor units containing phenylpiperazine and/or phenylacetylenic units. Homologues of a Schiff base series and an enyne series have been synthesized, allowing comparisons of their mesomorphic and thermodynamic properties. The Schiff bases showed smectogenic behavior and the enynes a smectic dimorphism and/or a nematic phase. The synthetic methodology was efficient for the synthesis of the desired precursor, 4-[4'-(prop-1-yn-3-al)phenyl]-piperazine-1-carboxylic acid ethyl ester.

引用

页码：23 / 34

页数：12