New Luminescent Liquid Crystals Based on 2,1,3-Benzothiadiazole and Bent Five-membered N-Heterocyclic Cores

被引：73

作者：

Gallardo, Hugo ^{[1
]}

Conte, Gilmar ^{[1
]}

Tuzimoto, Patricia A. ^{[1
]}

Behramand, B. ^{[1
]}

Molin, Fernando ^{[1
]}

Eccher, Juliana ^{[2
]}

Bechtold, Ivan H. ^{[2
]}

机构：

[1] Univ Fed Santa Catarina, Dept Quim, Florianopolis, SC, Brazil

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

来源：

LIQUID CRYSTALS | 2012年 / 39卷 / 09期

关键词：

2,1,3-benzothiadiazole; luminescent materials; liquid crystals; Sonogashira coupling; MESOMORPHIC BEHAVIOR; MESOGENS; 1,4-DIARYL; ISOXAZOLE; UNITS;

D O I：

10.1080/02678292.2012.698313

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

New fluorescent liquid crystalline (LC) compounds containing the 2,1,3-benzothiadiazole chromophore as the central core substituted with 1,2,4-oxadiazole, 1,2,3-triazole and 1,2-isoxazole heterocycles were synthesised and their mesophases characterised by polarised optical microscopy, differential scanning calorimetry and X-ray diffraction. We observed that the bent angles of the five-membered heterocyclic substituents are crucial in determining the thermal stability of the LC phases formed, indicating a delicate balance of forces involved in LC phases. The mesophases formed by all symmetrical and unsymmetrical compounds showed thermal stability in the order 1,2-isoxazole > 1,2,3-triazole > 1,2,4-oxadiazole.

引用

页码：1099 / 1111

页数：13

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