Liquid crystal composition and liquid crystal display device

A liquid crystal composition containing at least one compound selected from compounds represented by formula (1) as a first component that has a capability of a hydrogen bond donor and can form a hydrogen bond with an alignment film surface, an oligomer of the monomer, a prepolymer of the monomer or a polymer of the monomer, wherein a proportion of the first component when the weight of the liquid crystal composition excluding the first component and a polymerizable compound other than the first component is taken as 100 parts by weight is in the range of 0.05 part by weight to 10 parts by weight and a sum of the proportion of the first component and a proportion of the polymerizable compound other than the first component is in the range of 0.05 part by weight to 10 parts by weight:

• wherein, in formula (1), P is a polymerizable group having 3 to 20 carbons and one or more groups selected from α,β-unsaturated ester and cyclic ether, in which at least one of hydrogen may be replaced by halogen;
• A is a divalent group derived from a ring selected from adamantane, noradamantane, diamantane, triamantane, norbornene, norbornane, phthalan, coumaran, 1,2-methylenedioxybenzene, chroman, benzene, naphthalene, cyclohexane, cyclohexene, tetrahydropyran, dioxane, pyrimidine and pyridine, or a single bond, in which at least one of hydrogen may be replaced by halogen, alkyl having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one of hydrogen is replaced by halogen, B is a (n2+m)-valent group derived from a ring selected from adamantane, noradamantane, diamantane, triamantane, norbornene, norbornane, phthalan, coumaran,1,2-methylenedioxybenzene, chroman, benzene, naphthalene, cyclohexane, cyclohexene, tetrahydropyran, dioxane, pyrimidine and pyridine, or a single bond, in which at least one of hydrogen may be replaced by halogen, alkyl having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one of hydrogen is replaced by halogen;
• X1 is —H, —OH, —NH2, —NHR1, —SH or a heterocycle having 3 to 20 carbons and containing one or more of —NH—, and in the heterocycle, at least one of hydrogen may be replaced by halogen, in which, when both A and B are a single bond, X1 is a heterocycle having 3 to 20 carbons and containing at least one of —NH—, and in the heterocycle, at least one of hydrogen may be replaced by halogen;
• R1 is alkyl having 1 to 6 carbons;
• Z1 and Z2 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—, —COO—, —OCO— or —OCOO—, at least one of —CH2—CH2— may be replaced by —CH═CH— or —C≡C—, and when P is a polymerizable group having a cyclic ether group, Z1 is alkylene having 1 to 10 carbons in which at least one of —CH2— is replaced by —O—, —COO—, —OCO— or —OCOO—, and when X1 is hydrogen, Z1 is alkylene having 1 to 10 carbons in which at least one of hydrogen is replaced by —OH or —COOH;
• L1 is a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one of —CH2— may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one of —CH2—CH2— may be replaced by —CH═CH— or —C≡C—;
• m is 1, 2 or 3;
• n1 is 0, 1, 2, 3 or 4;
• n2 is 1, 2 or 3;
• and (n2+m) is an integer from 2 to 5.