| 摘要 |
To provide a compound, when the compound has both a high clearing point and a low crystallization temperature, having a wide temperature range of a liquid crystal phase and also an excellent solubility in other liquid crystal compounds, and further having general physical properties necessary for the compound, namely, stability to heat, light and so forth, a suitable optical anisotropy and a suitable dielectric anisotropy. A compound is represented by formula (1):;
wherein, for example, Ra and Rb are alkyl having 1 to 10 carbons; A1, A2, A3 and A4 are 1,4-phenylene; Z1, Z2, Z3 and Z4 are a single bond or alkylene having 1 to 4 carbons; and m, n, q and r are independently 0, 1, or 2, and a sum of m, n, q and r is 1, 2, 3 or 4. |
| 主权项 |
1. A compound represented by formula (1):wherein, in formula (1), Ra and Rb are independently hydrogen, halogen or alkyl having 1 to 10 carbons, and in the alkyl, arbitrary —CH2— may be replaced by —O—, —S—, —CO— or —SiH2—, and arbitrary —(CH2)2— may be replaced by —CH═CH— or —C≡C—; A1, A2, A3 and A4 are independently 1,4-cyclohexylene, 1,4-phenylene, cyclohexene-1,4-diyl, cyclohexene-3,6-diyl, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or naphthalene-2,6-diyl, and in the rings, one of —CH2— may be replaced by —O—, —S—, —CO— or —SiH2—, and arbitrary —(CH2)2— may be replaced by —CH═CH—, and in the rings, arbitrary hydrogen may be replaced by halogen, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2 or —OCH2F; Z1, Z2, Z3 and Z4 are independently a single bond or alkylene having 1 to 4 carbons, and in the alkylene, arbitrary —CH2— may be replaced by —O—, —S— or —SiH2—, and arbitrary —(CH2)2— may be replaced by —CH═CH— or —C≡C—; m, n, q and r are independently 0, 1 or 2, and a sum of m, n, q and r is 1, 2, 3 or 4; and when a sum of m, n, q and r is 1, Ra and Rb are independently hydrogen, halogen or alkyl having 1 to 10 carbons, and in the alkyl, arbitrary —CH2— may be replaced by —O—, —S—, —CO— or —SiH2—, and arbitrary —(CH2)2—may be replaced by —CH═CH— or —C≡C—; A1, A2, A3 and A4 are independently 1,4-cyclohexylene, 1,4-phenylene in which one or more of hydrogen is replaced by halogen, cyclohexene-1,4-diyl, cyclohexene-3,6-diyl, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or naphthalene-2,6-diyl, and in the rings, one of —CH2— may be replaced by —O—, —S—, —CO—, or —SiH2—, and arbitrary —(CH2)2— may be replaced by —CH═CH—, and in the rings, arbitrary hydrogen may be replaced by halogen, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2 or —OCH2F; and Z1, Z2, Z3 and Z4 are independently a single bond or alkylene having 1 to 4 carbons, and in the alkylene, arbitrary —CH2— may be replaced by —O—, —S— or —SiH2—, and arbitrary —(CH2)2— may be replaced by —CH═CH— or —C≡C—. |
