Synthesis and Property of Unsymmetric Bent-core Liquid Crystals Based on 2,5-Disubstitueted-1,3,4-oxadiazole

doi:10.6023/cjoc201504026

Chin. J. Org. Chem. ›› 2015, Vol. 35 ›› Issue (12): 2575-2582.DOI: 10.6023/cjoc201504026 Previous Articles Next Articles

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2,5-二取代-1,3,4-噁二唑不对称弯曲形液晶合成与性能研究

毛志鹏^a, 游红军^a, 王坤^a, 张智勇^a, 关金涛^a, 戴志群^a, 项颖^b

a 武汉轻工大学化学与环境工程学院武汉 430023;
b 广东工业大学信息工程学院广州 510006

收稿日期:2015-04-18 修回日期:2015-07-05 发布日期:2015-08-25
通讯作者: 张智勇 E-mail:zzy6211@126.com
基金资助:
国家自然科学基金(Nos. 11074054, 11374067)资助项目.

Synthesis and Property of Unsymmetric Bent-core Liquid Crystals Based on 2,5-Disubstitueted-1,3,4-oxadiazole

Mao Zhipeng^a, You Hongjun^a, Wang Kun^a, Zhang Zhiyong^a, Guan Jintao^a, Dai Zhiqun^a, Xiang Ying^b

a Department of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023;
b Department of Technology Institute and Information Engineering, Guangdong Polytechnic University, Guangzhou 510006

Received:2015-04-18 Revised:2015-07-05 Published:2015-08-25
Supported by:
Project supported by the National Natural Science Foundation of China (Nos. 11074054, 11374067).

1. Synthesis and Property of Unsymmetric Bent-core Liquid Crystals Based on 2,5-Disubstitueted-1,3,4-oxadiazole.PDF(1607KB)

Abstract

Two novel series of bent-core liquid crystals (9a~9e and 10a~10e) were prepared with a central bent core based on 2,5-disubstitueted-1,3,4-oxadiazole, ester group bridge (coo), alkyl tails with different carbon numbers (n=5~9), and one side wing substituted by fluorine atom. The structures of the target compounds were confirmed by IR, ¹H NMR, ¹³C NMR, MS, and their transition temperatures and phase textures were investigated by using differential scanning calorimetric (DSC) and polarizing optical microscopy (POM). The result suggested that all target compounds had right chemical structure. All compounds 9a~9e and 10a~10e exhibited nematic phase and existed wide temperature range of nematic phase. The widest range of nematic phase was 78 ℃. The temperature range of nematic phase of compounds 9a~9e with lateral monofluoro-substituted benzene was more narrow than compounds 10a~10e with lateral difluoro-substituted benzene. Moreover, compounds 9a~9e showed odd-even effect.

Key words: oxadiazole, unsymmetric bent-core liquid crystal, nematic phase, synthesis

Cite this article

Mao Zhipeng, You Hongjun, Wang Kun, Zhang Zhiyong, Guan Jintao, Dai Zhiqun, Xiang Ying. Synthesis and Property of Unsymmetric Bent-core Liquid Crystals Based on 2,5-Disubstitueted-1,3,4-oxadiazole[J]. Chin. J. Org. Chem., 2015, 35(12): 2575-2582.

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2,5-二取代-1,3,4-噁二唑不对称弯曲形液晶合成与性能研究

Synthesis and Property of Unsymmetric Bent-core Liquid Crystals Based on 2,5-Disubstitueted-1,3,4-oxadiazole

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