MESOGENIC BEHAVIOR IN SOME PYRAZOLE AND ISOXAZOLE DERIVATIVES

被引：70

作者：

BARBERA, J ^{[1
]}

CATIVIELA, C ^{[1
]}

SERRANO, JL ^{[1
]}

ZURBANO, MM ^{[1
]}

机构：

[1] UNIV ZARAGOZA,CSIC,INST CIENCIA MAT ARAGON,FAC CIENCIAS,E-50009 ZARAGOZA,SPAIN

来源：

LIQUID CRYSTALS | 1992年 / 11卷 / 06期

关键词：

D O I：

10.1080/02678299208030692

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Several aromatic-beta-diketones with a different number of alkyloxy groups in the aromatic rings and their derived pyrazoles, isoxazoles and thallium (I) complexes have been synthesized. The potential mesomorphic properties of these compounds have been investigated by optical microscopy, DSC and X-ray diffraction. The pyrazoles and isoxazoles with one chain in each aromatic ring are mesogenic, showing smectic A and smectic C mesophases, whereas the pyrazoles and isoxazoles with two chains per ring and the beta-diketones and thallium complexes are not. The mesogenic potentiality is shown to be related to the molecular linearity and to the number of alkyloxy groups. To the best of our knowledge, this is the first time liquid crystal properties have been described for pyrazole and isoxazole derivatives.

引用

页码：887 / 897

页数：11

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