Polymerizable compound, polymerizable composition, polymer, and optical anisotropic body

A polymerizable compound represented by a formula (I),

• wherein each of Y1 to Y8 independently represents a chemical single bond, —O—, —S—, —O—C(═)—, —C(═O)—O—,—O—C(═O)—O—, —NR1—C(═O)—, —C(═O)—NR1—, —O—C(═O)—NR1—, —NR1—C(═O)—O—, —NR1—C(═O)—NR1—,—O—NR1—, or —NR1—O—, R1 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,
• each of A2, A3, G1, and G2 independently represents a substituted or unsubstituted divalent linear aliphatic group having 1 to 20 carbon atoms that optionally includes —O—, —S—, —O—C(═O)—, —C(═O)—O—, —O—C(═O)—O—, —NR2—C(═O)—, —C(═O)—NR2—, —NR2—, or —C(═O)—, provided that a case where the linear aliphatic group includes two or more adjacent —O— or —S— is excluded, R2 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,
• each of Z1 and Z2 independently represents an alkenyl group having 2 to 10 carbon atoms that is substituted with a halogen atom, or unsubstituted,
• Ax represents an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring selected from a group consisting of an aromatic hydrocarbon ring and a hetcroaromatic ring,
• Ay represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 12 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, —C(═O)—R3, —SO2—R4, —C(═S)NH—R5, or an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring and a heteroaromatic ring, R3 represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 12 carbon atoms, R4 represents an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, a phenyl group, or a 4-methylphenyl group, R5 represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 12 carbon atoms, or a substituted or unsubstituted aromatic group having 5 to 20 carbon atoms,
• provided that the aromatic ring included in Ax and the aromatic ring optionally included in Ay are either substituted or unsubstituted, and
• A1 and Ay are optionally bonded to each other to form a ring,
• A1 represents a substituted or unsubstituted trivalent aromatic group,
• each of A4 and A5 independently represents a substituted or unsubstituted divalent aromatic group having 6 to 30 carbon atoms, and
• Q1 represents a hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms.