| 摘要 |
<p>Compounds of formula (I) are provided which are particularly useful in STN Devices, wherein n may be 1-5; m may be 1-5; q may be 0, 1 or 2; A1, A2 are independently chosen from 1,4-disubstituted benzene, 2,5-disubstituted pyrimidine, or 2,5-disubstituted pyridine, which may be laterally substituted with F, Cl, Br or CN; X2 may be H, F, Cl, Br, NO2, CN, NCS or CH=C(CN)2; X1 and X3 are independently chosen from H, F, Cl, Br, NO2, CN, NCS or CH3; Z1, Z2 are independently chosen from a direct bond, COO, OOC, C2H4, CH2O, OCH2, C4H8, C3H6O, (E)-CH=CHC2H4, (E)-CH=CHCH2O, -C≡C-; provided that at least one of X1, X2, X3 is halogen or nitrile and when m is 1, 3 or 5 the carbon-carbon double bond configuration is E and when m is 2 or 4 the carbon-carbon double bond configuration is Z.</p> |
