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首页> 外文期刊>Bulletin of the Korean Chemical Society >Synthesis and Liquid Crystalline Properties of the Compounds Consisting of a Schiff Base Type Mesogen and a Dyad Type Aromatic Ester Structure Interconnected Through the Central Hexamethylene Spacer
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Synthesis and Liquid Crystalline Properties of the Compounds Consisting of a Schiff Base Type Mesogen and a Dyad Type Aromatic Ester Structure Interconnected Through the Central Hexamethylene Spacer

机译：通过中心六亚甲基间隔基相互连接的席夫碱型液晶元和二元型芳族酯结构组成的化合物的合成及液晶性质

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摘要

A series of compounds consisting of 4`-oxybenzylidene-4-n-butylaniline, a mesogen, and a p-substituted phenoxyterephthaloyl structure a non-mesogen, interconnected through a central hexamethylene spacer were synthesized and their thermal behavior and liquid crystallinity were studied. p-Substituents included in this study are H, Cl, CN, NO2, n-C4H9O and phenyl groups. The compounds having phenyl and n-C4H9O substituents are enantiotropic and form smectic-A(SA) and nematic (N) phases. The compound with NO2 substituent is monotropic and forms only a nematic phase on heating the solid, whereas it forms nematic as well as SA phases on cooling the isotropic liquid. The rest compounds were found to be non-liquid crystalline. This is in great contrast to the fact that the monomesogenic model compound 4`-n-hexyloxybenzylidine-4-n-butylaniline forms SB, SC, SA and N phases enantiotropically.
机译：合成了一系列由4'-氧亚苄基-4-正丁基苯胺，介晶和对位取代的苯氧基对苯二甲酰基结构（非介晶）通过中心六亚甲基间隔基相互连接的化合物，并研究了它们的热行为和液晶性。这项研究中包括的对位取代基是H，Cl，CN，NO2，n-C4H9O和苯基。具有苯基和n-C4H9O取代基的化合物是对映体，并形成近晶A（SA）和向列相（N）相。具有NO 2取代基的化合物是单向性的，在加热固体时仅形成向列相，而在冷却各向同性液体时形成向列相和SA相。发现其余化合物是非液晶的。这与单相生成模型化合物4'-正己氧基苄基-4-亚丁基苯胺的对映体形成SB，SC，SA和N相形成了鲜明的对比。

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