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Mesomorphic properties of liquid crystalline compounds with chalconyl central linkage in two phenyl rings

机译:两种苯环中硅酰基中央键合液晶化合物的态晶特性

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In order to investigate the influence of the central linking group and the effect of flexibility on mesomorphism, we have synthesised a newly homologous series 3-(3-butoxyphenyl)-1-(4-nalkoxy phenyl) prop-2-en-1-one (series-l) consisting of 13 homologues C1-C8, C10, C12, C14, C16 and C18. In the present series, mesophase commences from the C6 homologue. C1-C5 homologues did not exhibit liquid crystalline (LC) property, while C6-C12 homologues exhibited an enantiotropic nematic phase and the rest of the homologues C14-C18 displayed monotropic SmC and nematic mesophase. The transition temperatures of the synthesised compounds were determined by an optical polarising microscopy equipped with a heating stage. All newly synthesised compounds were confirmed by 1H-NMR, 13C-NMR, IR and elemental analysis.
机译:为了探讨中央连接组的影响和柔韧性对中间体的影响,我们合成了一种新同源的3-(3-丁氧基苯基)-1-(4-烯烷苯基)-1-(4-烯烷基苯基)PROP-2-EN-1- 一种(系列-1)由13种同源物C1-C8,C10,C12,C14,C16和C18组成。 在本系列中,中间相波从C6同源物开始。 C1-C5同源物未表现出液晶(LC)性质,而C6-C12同源物表现出脱嗜脱氢型向列相,其余的同源物C14-C18显示单调的SMC和向列中的中间相。 合成化合物的过渡温度通过配备有加热阶段的光学偏振显微镜测定。 所有新合成的化合物通过1H-NMR,13C-NMR,IR和元素分析证实。

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