亚甲氧基桥键弯曲型液晶合成与性能研究  

Synthesis and Property of Oxymethylene-Bridged Bent-core Liquid Crystals

作　　者：王勇丽[1] 杜琼[1] 王国华[1] 张智勇[1] 戴志群[1] 关金涛[1] 项颖[2] 

机构地区：[1]武汉轻工大学化学与环境工程学院,武汉430023 [2]广东工业大学信息工程学院,广州510006

出　　处：《有机化学》2013年第9期2010-2015,共6页Chinese Journal of Organic Chemistry

基　　金：国家自然科学基金(No.11074054);湖北省教育厅科技基金(Z20091801);武汉工业学院研究生教育创新基金(No.2011cx003)资助项目~~

摘　　要：以2,5-二(4-羟基苯基)-1,3,4-噁二唑为中心基团,亚甲氧基(CH2O)为桥键,烷基(m=3,5,6,7,8,9,10)为末端基团合成了一系列新型弯曲型液晶化合物.通过IR,1H NMR,13C 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,目标化合物6a^6g的分子结构正确,其熔点较结构相当的酯类液晶化合物低,除6c外,其它化合物熔点均在100℃以下,都呈现液晶相态,且化合物6d^6g的相态温度范围较宽,并呈现奇偶效应.We have prepared a novel series of bent-core molecules with a central bent core based on 2,5-bis（4-hydroxyphenyl）-1,3,4-oxadiazole, oxymethylene-bridged（-CH2O-）, and alkyl tails with carbon numbers m= 3, 5, 6, 7, 8, 9, 10. Structures of the titled compounds were confirmed by IR, 1H NMR, 13C NMR, MS techniques, their transition temperatures and phase transition were investigated using differential scanning calorimetric（DSC） and polarizing optical microscopy（POM）. Comparing with ester-bridged, target compounds 6a^6g have right chemical structure, possessed low melting points that below 100 ℃（except 6c） and exhibited liquid crystal phases. Compounds 6d^6g exist in wide phase temperature range and show odd-even effect.

关 键 词：弯曲型液晶 噁二唑 亚甲氧基 合成 低熔点 

分 类 号：O753.2[理学—晶体学]