Liquid crystals containing the isoxazole and tetrazole heterocycles

被引：24

作者：

da Silva, L

Gallardo, H

Magnago, RF

Begnini, IM

机构：

[1] Univ Vale Itajai, Sao Jose Dos Campos, Brazil

[2] Univ Fed Santa Catarina, Dept Chem, Florianopolis, SC, Brazil

[3] Univ Sul Santa Catarina, Tubarao, SC, Brazil

[4] Univ Blumenau, Blumenau, SC, Brazil

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2005年 / 432卷

关键词：

mesogens; phenylisoxazole; phenyltetrazole;

D O I：

10.1080/154214090892528

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The influence of the bridging group between the mesogenic group and the terminal position on liquid-crystalline behavior was investigated. Two liquid-crystalline series containing pentagonal heterocycles were synthesized for this purpose. The liquid-crystal phase of mesogens with the isoxazole group was more stable than that of those with isoxazole and tetrazole groups in the same molecule. The mesogens with only the isoxazole group showed better thermal properties than those with isoxazoles and tetrazoles. Nematic and smectic phases were observed. The mesophase sequences of the materials were investigated by polarization microscopy and DSC (Differential Scanning Calorimetry).

引用

页码：1 / 13

页数：13

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