Liquid crystal alkenyl bicyclo[2.2.2]octanes and mixtures and devices containing such compounds
申请人:The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
公开号:US06187393B1
公开(公告)日:2001-02-13
Compounds of formula (I)
are provided which are particularly useful in super twisted nematic devices, where n may be 0-5; m may be 0-5; p may be 1-9; q may be 1, 1, or 2; A1, A2 are independently chosen from 1-4, -disubstituted benzene, 2,5-disubstituted pyrimidine, or 2,5-disubstituted pyridine, trans- 1,4-disubstituted cyclohexane, trans- 2,5-disubstitued dioxane. The aromatic rings may be laterally substituted with F, Cl, Br or CN; Z1 may be O, COO, OOC; Z2, Z3 are independent chosen from a direct bond, COO, OOC, C2H4, CH2O, OCH2, or -c≡c-, provided that when Z1 is O and m is 1, 3 or 5 the carbon—carbon double bond configuration is E; provided that when Z1 is O and m is 2 or 4 the carbon—carbon double bond configuration is Z; provided that when Z1 is COO or OOC and m is 0, 2 or 4 the carbon—carbon double bond configuration is E; and provided that when Z1 is COO or OOC and m is 1, 3 or 5 the carbon—carbon double bond configuration is Z.
提供了化学式(I)的化合物,特别适用于超扭曲向列型液晶器件,其中n可以为0-5;m可以为0-5;p可以为1-9;q可以为1,1或2;A1,A2独立选择自1-4,-二取代苯,2,5-二取代嘧啶,或2,5-二取代吡啶,反-1,4-二取代环己烷,反-2,5-二取代二噁烷。芳香环可以侧基取代F,Cl,Br或CN;Z1可以为O,COO,OOC;Z2,Z3独立选择自直接键,COO,OOC,C2H4,CH2O,OCH2或-c≡c-,前提是当Z1为O且m为1,3或5时,碳-碳双键构型为E;当Z1为O且m为2或4时,碳-碳双键构型为Z;当Z1为COO或OOC且m为0,2或4时,碳-碳双键构型为E;当Z1为COO或OOC且m为1,3或5时,碳-碳双键构型为Z。