| 摘要 |
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. |
