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首页> 外文期刊>International Journal of Molecular Sciences >Synthesis of 1,4-Bis(phenylethynyl)benzenes and Their Application as Blue Phase Liquid Crystal Composition
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Synthesis of 1,4-Bis(phenylethynyl)benzenes and Their Application as Blue Phase Liquid Crystal Composition

机译：1,4-双（苯基乙炔基）苯的合成及其在蓝相液晶组合物中的应用

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摘要

A number of 1,4-bis(phenylethynyl)benzene derivatives (BPEBs) and their analogues with different numbers of side-substitute fluorine atoms on benzene rings, and alkyl chains, ethoxyl groups, fluorine atoms and trifluoromethyl groups as the end groups have been synthesized. The effects of the different substituents on their properties such as thermal behavior of melting point and clearing point, the temperature of nematic phase, optical anisotropy and dielectric anisotropy have been well investigated, and it has been found that some BPEBs have a wide range of the nematic phase temperature with high optical anisotropy (Δn) and acceptable dielectric anisotropy (Δɛ), which have been applied as the crucial compositions to constitute a liquid crystal mixture having the properties of Δɛ = 29.0 and Δn = 0.283 at 25 °C. With the addition of the chiral dopant to the obtained liquid crystal mixture, blue phase liquid crystal with a blue phase temperature range of 8 °C has been achieved.
机译：许多1,4-双（苯基乙炔基）苯衍生物（BPEB）及其类似物在苯环上具有不同数量的侧取代氟原子，并且烷基链，乙氧基，氟原子和三氟甲基为端基合成的。各种取代基对其性质如熔点和透明点的热行为，向列相的温度，光学各向异性和介电各向异性的影响已得到了很好的研究，并且发现一些BPEB具有广泛的具有高光学各向异性（Δn）和可接受的介电各向异性（Δφ）的向列相温度已被用作构成在25℃下具有Δφ＝ 29.0和Δn＝ 0.283的性质的液晶混合物的关键组合物。通过将手性掺杂剂添加到所获得的液晶混合物中，已经实现了蓝相温度范围为8℃的蓝相液晶。

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