Rod-shaped dopants for flexoelectric nematic mixtures
Rod-shaped dopants for flexoelectric nematic mixtures
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DOI：
10.1080/02678290903031643
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发表时间：
2009-01-01
期刊：
影响因子：
2.2
通讯作者：
Goulding, Mark
中科院分区：
文献类型：
--
作者：
Aziz, Nayyar;Kelly, Stephen M.;Goulding, Mark
我们报告的合成和液晶行为的两个系列的对位取代的三联苯作为掺杂剂与刚性棒状的形状，而不是一个楔形，梨形或香蕉形，宾主混合物的挠曲电性能。一个系列的液晶掺杂剂具有低至强负介电各向异性，另一个系列的液晶掺杂剂具有低至强正介电各向异性。非极性和极性棒状掺杂剂作为用于LCD的正介电各向异性的挠曲电混合物的组分的有用性一般被研究，并且特别地研究了掺杂的挠曲电混合物的挠曲电性质对掺杂剂的极性的依赖性。的掺杂剂的浓度和几个客人-主机的混合物的挠曲弹性比的大小之间的相关性进行了研究。
We report the synthesis and liquid crystalline behaviour of two series of para-substituted terphenyls as dopants with a rigid rod-like shape, rather than a wedge-, pear- or banana-shape, for guest-host nematic mixtures with flexoelectric properties. One series of liquid crystalline dopants is of low-to-strongly negative dielectric anisotropy and the other is of low-to-strongly positive dielectric anisotropy. The usefulness of apolar and polar rod-like dopants as components of flexoelectric nematic mixtures of positive dielectric anisotropy for use in LCDs is investigated in general and the dependence of the flexoelectric properties of the doped nematic mixtures on the polarity of the dopants is studied in particular. The correlation between the concentration of the dopant and the magnitude of the flexoelastic ratio of several guest-host nematic mixtures is investigated.