α-甲基联苯酯类液晶的合成与性质  

Synthesis and Property of Liquid Crystal Compounds: α-Methyl biphenyl esters

作　　者：张智勇[1] 莫小曼[2] 陆婉芳[3] 施耀曾[3] 

机构地区：[1]石家庄实力克液晶材料有限公司,石家庄050061 [2]湖北省黄冈师范学院化学系 [3]南京大学化学系

出　　处：《应用化学》2003年第1期59-64,共6页Chinese Journal of Applied Chemistry

摘　　要：合成了 2个系列 (PBM和PMB)的α 甲基联苯酯类液晶共 1 2个化合物。由于α 甲基的位阻效应 ,它们都是低熔点液晶化合物。其中PBM系列的α 甲基在分子的极性端基 ,使该化合物具有宽的近晶C相态(Sc)和手性近晶C相态 (Sc )温度范围 ,并出现向列相态 (N) ,为合成新型铁电液晶材料开辟了一条新途径。而PMB系列因αTwo series of α-methyl biphenyl esters, series PBM and series PMB including tweleve compounds were synthesized. All these compounds are liquid crystals with low melting points due to the α-methyl stereo-effect. There are very wide smectic C(Sc) or chiral smectic C(Sc *) liquid crystal phase ranges in the PBM series compounds, but narrow phase ranges in the PMB series where the α-methyl is in the central part of the molecular chain. The chemical structures of the compounds were verfied by IR, 1H NMR, MS spectra and elemental analysis. Their transition temperatures of liquid crystal phase and phase states were verified by DSC and POM. They could have promising applications especially as components in the ferroelectric liquid crystal display.

关 键 词：α-甲基联苯酯类液晶 铁电液晶 合成 相态行为 甲基位阻效应 

分 类 号：O625.323[理学—有机化学] TM22[理学—化学]