阐述了形成大双折射液晶化合物的结构因素和含炔键大双折射液晶化合物的主要研究成果.迄今研究发现:二芳基取代的乙炔类(PTP)液晶双折射范围在0.25～0.49;双烷基联苯炔(PPTP)类液晶双折射范围在0.32～0.5;双苯二乙炔类(PTTP、PTDTP、PTPTP)液晶双折射范围在0.35～0.67;三联苯乙炔苯类液晶化合物双折射值约为0.54;含氰基或异硫氰基的苯炔类液晶双折射范围在0.25～0.79;稠环基苯乙炔类液晶双折射在0.36～0.79.含炔键苯类液晶材料具有较大的双折射值和实用价值.
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