| 主权项 |
1. A liquid crystal composition that has a nematic phase and contains at least one compound selected from the group of compounds represented by formula (1) as a first component, and at least one compound selected from the group of compounds represented by formula (2) as a second component: wherein, in formula (1) and formula (2), R1 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; R2 and R3 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 to 12 carbons in which at least one piece of hydrogen is replaced by halogen, or alkenyl having 2 to 12 carbons in which at least one piece of hydrogen is replaced by halogen; ring A and ring B are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, 2,3,5-trifluoro-1,4-phenylene, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl, tetrahydropyran-2,5-diyl or naphthalene-2,6-diyl; Z1 and Z2 are independently a single bond, ethylene, vinylene, methyleneoxy, carbonyloxy or difluoromethyleneoxy, and at least one of m pieces of Z1 or j pieces of Z2 is difluoromethyleneoxy; X1, X2, X6, X7 and X8 are independently hydrogen or fluorine; Y1 is fluorine, chlorine, alkyl having 1 to 12 carbons in which at least one piece of hydrogen is replaced by halogen, alkoxy having 1 to 12 carbons in which at least one piece of hydrogen is replaced by halogen, or alkenyloxy having 2 to 12 carbons in which at least one piece of hydrogen is replaced by halogen; and m and j are independently 0, 1, 2 or 3, and a sum of m and j is 2 or 3. |
