| 摘要 |
To provide a liquid crystal compound satisfying at least one of high stability to heat, light and so forth, a high clearing point, a low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large dielectric anisotropy, a suitable elastic constant and excellent compatibility with other liquid crystal compounds, a liquid crystal composition containing the compound, and a liquid crystal display device including the composition.;The compound is represented by formula (1):;;wherein, for example, R is alkyl having 1 to 10 carbons or alkoxy having 1 to 9 carbons; ring A1, ring A2 and ring A3 is 1,4-cyclohexylene, 1,4-phenylene or 2,3-difluoro-1,4-phenylene; at least one of L1 and L2 is fluorine and the remainder is hydrogen; Z1, Z2 and Z3 are a single bond, —(CH2)2—, —CH2O— or —COO—; x and y are an integer from 0 to 10; and l, m and n are 0 or 1. |
| 主权项 |
1. A compound represented by formula (1):wherein, in formula (1),
R is hydrogen, alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons or alkenyloxy having 2 to 9 carbons; ring A1, ring A2 and ring A3 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl, pyridine-2,5-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,3-difluoro-1,4-phenylene; L1 and L2 are independently hydrogen, fluorine or chlorine, and at least one of L1 and L2 is fluorine; Z1, Z2, and Z3 are independently a single bond, —(CH2)2—, —CH2O—, —OCH2—, —COO—, —OCO—, —CF2O—, or —OCF2—; x and y are independently an integer from 0 to 10; and l, m and n are independently 0, 1 or 2, and a sum of l, m and n is 1, 2 or 3. |
