4-(4′dime thylaminobenzoyloxy)benzylidene-4″-cyanoanmlines were synthesized. They show broad nematic phases with high nematic isotropic transitions. Lateral Clsubstituents decrease the clearing points of these liquid crystals by about 80°. The intermediate 4-(4′-alkylbenzoyloxy)benzaldehydes are monotropic nematic.
合成了直链的4-(4'-烷基苯甲酰氧基)-,4-(4'-甲基芳基苯甲酰氧基)-和4-(4'二苯
硫基
氨基苯甲酰氧基)亚苄基-4″-
氰基
亚胺。它们显示出具有高向列各向同性转变的宽向列相。横向Cl取代基使这些液晶的澄清点降低约80°。中间体4-(4'-烷基苯甲酰氧基)
苯甲醛是单向性的向列型。