Tolane liquid crystals bearing fluorinated terminal group and their mid-wave infrared properties

被引：32
作者：
Hu, Minggang [1 ]
An, Zhongwei [1 ,2 ]
Li, Jian [1 ]
Mo, Lingchao [1 ]
Yang, Zhi [1 ]
Li, Juanli [1 ]
Che, Zhaoyi [1 ]
Yang, Xiaozhe [1 ]
机构：
[1] Xian Modern Chem Res Inst, Xian, Peoples R China
[2] Shaanxi Normal Univ, Sch Mat Sci & Engn, Xian, Peoples R China
来源：
LIQUID CRYSTALS | 2014年 / 41卷 / 12期
关键词：
tolane; liquid crystals; infrared; birefringence; HIGH-BIREFRINGENCE; ANISOTROPY;
D O I：
10.1080/02678292.2014.949318
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This paper describes the synthesis and characterisation of several liquid crystal (LC) compounds having a tolane core structure and a trifluoromethoxy terminal group. The mesomorphic properties, mid-wave infrared (IR) absorption and birefringence were investigated. These materials exhibit low absorption in mid-wave IR regions (MWIR) and high birefringence (Delta n~0.26-0.29). The impact of fluorine substitution was investigated. Compounds with monofluorine exhibit wide mesophase temperature (88.5 degrees C), and the mesomorphic behaviour weakened with increasing fluorine atom. The results show that they are promising LC materials for applications in the MWIR.
引用
收藏
页码：1696 / 1702
页数：7
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