期刊论文

Synthesis and property of unsymmetric bent-core liquid crystals

中文

武汉轻工大学学报

2095-7386

2015

3

41-45

10.3969/j.issn.2095-7386.2015.03.009

国家自然基金资助项目（11374067）；

本校为第一机构

以2，5-二取代-1，3，4-噁二唑为中心核，酯基（-COO-）为桥键，直链烷基为末端基团，在单侧苯环侧位上引入氟原子，设计合成了3个新型不对称弯曲形液晶化合物8，9a和9b；并通过IR，1 H NMR，13 C NMR，19 F NMR和MS对其结构进行鉴定，经差热扫描仪（ DSC）和偏光显微镜（ POM）测定其液晶相态。结果表明：所有目标化合物的分子结构正确，都呈现向列相态，向列相态温度范围最宽达78℃；侧位单氟苯环结构化合物（8）的向列相温度范围没有二氟苯环结构（9）的宽。

Three novel bent-core liquid crystal compounds (8, 9a and 9b) were prepared with a central bent core based on 2,5-disubstitueted-1,3,4-oxadiazole,ester group bridge (-coo-), alkyl terminal tails, and one side wing substituted by fluorine atom .The structures of the target compounds were confirmed by IR , 1 H NMR, 13 C NMR, MS, and their transition temperatures and phase textures were investigated by using differential scanning calorimet -ric (DSC) and polarizing optical microscopy (POM).The result suggested that all target compounds had right c...