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。 A new type of terminal cyano substituted fluorinated tetraphenyl acetylene liquid crystal was designed and synthesized. The phase behavior was studied by means of a polarizing microscope and DSC, which showed only one broad nematic phase. The effects of volume and polarity on the stability of liquid crystal and the temperature range of phase transition are discussed.