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设计并合成了一类新型末端氰基取代含氟二苯乙炔类液晶。通过偏光显微镜和DSC对其相态进行了研究,此类化合物仅呈现一个宽的向列相。讨论了体积效应和极性因素对液晶稳定性及相变温度范围的影响。

Two series of tolan-type liquid crystals containing terminalcyano group were synthesized. Their phase transition temperatures were also measured by texture observation with a polarizing microscope and confirmed by DSC.All compounds only exhibit a nematic phase. Their mesomorphic properties and fluoro-substituents effect were studied in detail.

参考文献

[1] 黄锡珉, 黄辉光, 李之熔译. 日本学术振兴会第142委员会编. 液晶器件手册 [M]. 北京: 航空工业出版社, 1992, 55.
[2] Tournilhac F, Blinov L M, Simon J. Ferroelectric liquid crystals from achiral molecules [J]. Nature, 1992, 359(6396), 621-623.
[3] Wen J X, Yu H B, Chen Q. Synthesis and mesomorphic properties of 4-[(4-cyanophenyl)]-2, 3, 5, 6-tetrafluorophenyl 4-n-alkoxybenzotes [J]. J. Mater. Chem., 1994, 4(11), 1715-1717.
[4] 杨永刚, 龚亻刍, 陈宝铨, 等. 新型有机汞类液晶的合成及其相变研究 [J]. 液晶与显示, 1998, 13(4):231-237.
[5] Wen J X, Yin H Y, Tian M A, Chen Q. Synthesis and mesomorphic properties of 4-n-alkoxy 4′-[4-((4-alkoxy-2, 3, 5, 6-tertrafluorophenyl)ethynyl)benzyloxy]benzoates [J]. Liq. Cryst., 1995, 19(4):511-517.
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