以羰基为中心基团的香蕉形液晶合成与性能研究  

Synthesis and Property of Bent-Core Liquid Crystal Compounds with Carbonyl Central Unit

作　　者：黄江涛[1] 游红军[1] 张智勇[1] 关金涛[1] 戴志群[1] 张开诚[1] 

机构地区：[1]武汉轻工大学化学与环境工程学院,湖北武汉430023

出　　处：《液晶与显示》2013年第5期668-673,共6页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.11074054);湖北省教育厅科技基金(No.Z20091801);武汉轻工大学研究生教育创新基金(No.2011cx003)

摘　　要：以4,4'-二羟基二苯甲酮为中心结构基元,以酯基(-COO-)作为桥键,烷基(m=5,6,7,8,9,10)为末端基团,合成了一系列新型香蕉形液晶化合物(mPEPK),通过IR、~1H NMR、^(13)C NMR和MS鉴定这些化合物的结构正确,并经过差热扫描仪(DSC)和偏光显微镜(POM)测定其相变温度和相态织构。结果表明,所合成目标化合物具有近晶相,并且相转变温度较类似结构香蕉型液晶化合物有大幅度降低。A novel series of bent-core molecules （mPEPK） was prepared with a central bent core based on 4,4-dihydroxybenzophenone （DHBP）, ester group bridge（—COO—）, and alkyl tails with different carbon numbers （m= 5, 6, 7, 8, 9, 10.）. The structures of the titled compounds were confirmed by IR, 1H NMR, 13C NMR, MS spectra, and their transition temperatures and phase textures were investigated by using differential scanning calorimetric（DSC） and polarizing optical microscopy（POM）. A part of the compounds exist smectic phase. Comparing with the similar compounds, the target compounds （m-PEPK） have declined to a great extent in liquid crystalline phase transition temperatures.

关 键 词：弯曲液晶 二苯甲酮 液晶相态 合成 

分 类 号：TN27[电子电信—物理电子学]