三苯环香蕉形液晶的合成和表征  

Synthesis and Characterization of Three-Benzene-Ring Banana-Shaped Liquid Crystals

作　　者：马青兰[1] 黄远明[1] 

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650092

出　　处：《液晶与显示》2010年第2期161-165,共5页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.10674091);国家教育部资助海外归国学者科学研究基金(No.2005-546);国家教育部重点研究项目基金(No.206110);云南省青年科学项目基金(No.2008PY058);云南省自然科学基金(No.2008CD110)

摘　　要：通过脂肪酸和三苯环化合物1,3-phenylene bis(4-hydroxybenzylideneamine)的酯化反应合成了对称的同系物三苯环香蕉形分子化合物N,N-bis(4-(alkylcarbonyloxyl)benzylidene)benzene-1,3-diamine,其末端酯基尾链中的碳原子数为1～12。用偏光显微镜和差示扫描量热分析法对所合成的三苯环香蕉形分子化合物进行了细致的表征。结果表明:这些三苯环香蕉形分子化合物在第二次升温和第二次降温过程中均能够形成液晶相,其香蕉相分别在187～218℃(升温)和120～179℃(降温)之间形成。A homologous series of three-benzene-ring containing bent-core compounds N,N-bis（4-（alkylcarbonyloxyl）benzylidene）benzene-1,3-diamine were synthesized by esterifying aliphatic acids with the three-benzene-ring containing bent-core 1,3-phenylene bis（4-hydroxybenzylideneamine）,the number of carbon atoms in their two symmetric terminal arms is from 1 to 12. The mesomorphic properties of the homologous series of the three-benzene-ring containing bent-core compounds were characterized by means of polarized optical microscopy and differential scanning calorimetery. The results have demonstrated that the three-benzene-ring containing bent-core compounds can form mesophases.

关 键 词：香蕉形液晶 三苯环 弯曲中心 香蕉相 

分 类 号：O753.2[理学—晶体学]