PIPERIDINE DERIVATIVE, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

To provide a liquid crystal composition containing a compound that is effective in preventing photolysis of the liquid crystal composition, and has high solubility in the liquid crystal composition, and to provide a liquid crystal display device including the composition.;The liquid crystal composition contains a compound represented by formula (1), and a liquid crystal display device uses the composition:;;in which, in formula (1), R1 to R8 are hydrogen or alkyl having 1 to 4 carbons; ring A1 and ring A2 are cyclohexylene, phenylene, naphthalenediyl or the like; Z1, Z2 and Z3 are a single bond or the like; and a and b are independently 1 or 2, and c is 0, 1 or 2.

主权项

1. A liquid crystal composition, containing at least one compound selected from the group of compounds represented by formula (1), and at least one compound represented by formulas (2) to (4):wherein, in formula (1),
R1, R2, R3, R4, R5, R6, R7 and R8 are independently hydrogen or alkyl having 1 to 4 carbons; ring A1 and ring A2 are independently cyclohexylene, cyclohexenylene, decahydronaphthalenediyl, dihydropyrandiyl, tetrahydropyrandiyl, dioxanediyl, phenylene, naphthalenediyl, pyrimidinediyl or pyridinediyl, and in the rings, at least one of hydrogen may be replaced by halogen, alkyl having 1 to 5 carbons, alkoxy having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one of hydrogen is replaced by halogen; Z1, Z2 and Z3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one of —CH2— may be replaced by —O—, —S—, —CO—, —COO—, —OCO— or —SiH2—, at least one of —CH2—CH2— may be replaced by —CH═CH— or —C≡C—, and in the groups, at least one of hydrogen may be replaced by halogen; and a and b are independently 1 or 2, and c is 0, 1 or 2;wherein, in formulas (2) to (4),
R11 and R12 are independently alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, and in the alkyl or the alkenyl, at least one of —CH2— may be replaced by —O—, and at least one of hydrogen may be replaced by fluorine; ring B1, ring B2, ring B3 and ring B4 are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene or pyrimidine-2,5-diyl; and Z11, Z12 and Z13 are independently a single bond, —CH2CH2—, —CH═CH—, —C≡C— or —COO—.