摘要
通过DCC辅助的酯化反应,合成了一系列(共7种)新型液晶化合物,即4-(4-烷氧基苯基偶氮基)苯甲酸-3-氟-4-氰基苯基酯,其中"烷氧基"代表丁氧基、戊氧基、己氧基、庚氧基、辛氧基、壬氧基和癸氧基中的一种。通过红外光谱、核磁共振氢谱和元素分析确认了这些化合物的结构。用示差扫描量热(DSC)和偏光显微镜(POM)检测了这些化合物的液晶性质,发现7种化合物都是互变热致液晶化合物,在介晶范围内都呈现向列相;这些化合物的清亮点随着烷氧基中碳原子数目增加而下降。该系列中最高的清亮点可达264℃,最大介晶相范围可达156℃。该文报告工作的新颖性,已由青岛市科学技术信息研究所2009年2月18日出具的第200905321107号《科技查新报告》所证实。
A series of new liquid-crystalline compounds ,3-fluoro-4-cyanophenyl 4-（4-alkoxyphenylazo） benzoate （where ＂alkoxy＂ was one of butyloxy, pentyloxy, hexyloxy, heptyloxy, octoylxy, nonoxy and decyloxy） were synthesized through DCC-aided esterification. They were characterized with IR, ^1 HNMR and elementary analysis. The liquid-crystalline properties of these compounds were explored using differential scanning calorimetry （DSC） and polarizing optical microscope （POM）. All the seven compounds were found to be the enantiotropic liquid-crystalline compounds ; the clearing points of these compounds decreased along with the increase of the number of carbon atoms in the alkoxy group. The highest clearing point in this series was 264 ℃ and the largest mesophase range was 156 ℃. The novelty of the compounds in this study has been testified by the Novelty Assessment Report No. 200905321107,issued by Qingdao Institute of Science and Technology Information on Feburarv 18.2009.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2009年第8期742-746,共5页
Fine Chemicals
基金
山东省教育厅科技计划项目(J07YC09)~~
关键词
液晶
偶氮苯
2-氟4-羟基苯腈
功能材料
liquid crystal
azobenzene
2-fluoro-4-hydroxybenzonitrile
functional materials
