4-(2,3,5,6-四氟-烷基取代苯乙基)苯甲酸-4′-氟-4-联苯酯的合成及液晶性研究  

Synthesis and Mesomorphic Properties of 4′-Fluorobiphenyl4-yl-4-(2,3,5,6-Tetrafluoro-4-Alkylphenethyl)Benzoates

作　　者：孙冲[1] 秦川[1] 闻建勋 

机构地区：[1]华东理工大学化学与分子工程学院,上海200237 [2]上海天问化学有限公司,上海200232

出　　处：《液晶与显示》2011年第3期267-273,共7页Chinese Journal of Liquid Crystals and Displays

摘　　要：以2,3,4,5,6-五氟溴苯和脂肪醛为起始原料,设计并合成了一系列含四氟苯基亚乙基的四环酯类液晶化合物,通过偏光显微镜和DSC对其相变行为进行了研究。整个系列化合物有较宽的向列相温度范围,所合成的化合物中,随着末端碳链的增长,熔点和清亮点呈现下降趋势。A series of 1,2-bisubstituted ethane＇s liquid crystals containing polyfluorophenyl group were synthesized from penta-fluorobromobenzene and aliphatic aldehydes.Their phase transition behaviours were studied by DSC and thermal polarizing microscopy.The results showed this series of compounds have high clearing point and wide temperature range of nematic phase.The phase transition temperature is lower when the alkyl chains of compounds become longer.

关 键 词：含氟液晶 四氟苯基亚乙基 相变 

分 类 号：O753.2[理学—晶体学]