| 摘要 |
An object is to provide a liquid crystal compound satisfying at least one of physical properties such as a high stability to heat, light and so forth, a high clearing point, a low minimum temperature of a liquid crystal phase, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, a suitable elastic constant and an excellent compatibility with other liquid crystal compounds, a liquid crystal composition containing the compound, and a liquid crystal display device including the composition.;A solution is the compound represented by formula (1):;;wherein, in formula (1),
for example, R1 is alkyl having 1 to 10 carbons; ring A1 and ring A2 are independently 1,4-cyclohexylene or 1,4-phenylene; Z1 and Z2 are independently a single bond or —CF2O—; L1 and L2 are halogen; and a is 1 or 2. |
| 主权项 |
1. A compound represented by formula (1): wherein, in formula (1), R1 is alkyl having 1 to 10 carbons, and in the alkyl, at least one of —CH2— may be replaced by —O—, and at least one of —CH2CH2— may be replaced by —CH═CH—, and in the groups, at least one of hydrogen may be replaced by halogen; ring A1 and ring A2 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 1,4-phenylene in which at least one of hydrogen is replaced by halogen, tetrahydropyran-2,5-diyl, pyrimidine-2,5-diyl, pyridine-2,5-diyl, 1,3-dioxane-2,5-diyl or 2,6,7-trioxabicyclo[2.2.2]octane-1,4-diyl; Z1 and Z2 are independently a single bond, —CH2CH2—, —C≡C—, —CH═CH—, —CF2O—, —CH2O— or —COO—; L1 and L2 are independently hydrogen or halogen; and a is 0, 1, 2 or 3, however, when a is 0, Z2 is —CF2O—. |
