| 摘要 |
A compound represented by formula (1), a liquid crystal composition, a liquid crystal display device are described.;;In formula (1), for example, the ring A1 and the ring A4 are phenylene or cyclohexylene; Z1, Z2, Z3 and Z4 are a single bond or alkylene having 1 to 6 carbons; L1 is a single bond; s and t are 0; and P1, P2, P3 and P4 are a polymerizable group. |
| 主权项 |
1. A compound represented by formula (1): wherein ring A1, ring A2, ring A3 and ring A4 are independently phenylene or cyclohexylene, and in these groups at least one hydrogen may be replaced by alkyl having 1 to 10 carbons, fluorine, —CF2H or —CF3; Z1, Z2, Z3 and Z4 are independently a single bond or alkylene having 1 to 6 carbons, and in the alkylene at least one —CH2— may be replaced by —O—, —COO—, —CH═CH— or —C≡C—; L1, L2 and L3 are independently a single bond, —CH═CH—, —CH═CH—COO—, —C(CH3)═CH—COO—, —CH═C(CH3)—COO—, —C(CH3)═C(CH3)—COO—, —C≡C—, —COCH═CH—, —C(CH3)═C(CH3)—, —CH═CH—CH2O—, —CH═CH—OCH2— or —CO—, and at least one of L1, L2 and L3 is —CH═CH—, —CH═CH—COO—, —C(CH3)═CH—COO—, —CH═C(CH3)—COO—, —C(CH3)═C(CH3)—COO—, —C≡C—, —COCH═CH—, —C(CH3)═C(CH3)—, —CH═CH—CH2O—, —CH═CH—OCH2— or —CO—; s and t are independently 0 or 1, and the sum of s and t is 0, 1 or 2; P1, P2, P3 and P4 are independently a polymerizable group; and when L1 is a single bond and s and t are 0, an alkyl substituent at 2-position of the ring A1 and an alkyl substituent at 2-position of the ring A4 may be bonded with each other to form a ring. |
