A variety of biphenylthienyl and terphenyl-based liquid crystalline materials were prepared that incorporate a 1,1-difluoropentyl terminal group. The mesogenic properties of these compounds were compared and contrasted with analogs where the CF2 moiety was replaced by a -CH2-, -O- or -CO- group. The 1,1-difluoroalkyl group is unique in its behavior and tends to promote orthogonal smectic phase behavior.
制备了一系列含有1,1-二
氟戊基末端基团的联
苯并噻吩型和三
联苯型液晶材料。将这些化合物的液晶性能与
CF2基团被-
CH2-、-O-或-CO-基团替代的类似物的性能进行了对比。1,1-二氟烷基具有独特的行为,倾向于促进正交层状相行为。