Dichroic dye compound, polarizing film, and uses thereof

A composition comprising a polymerizable liquid crystal compound and a compound represented by formula (1):

• wherein R1 represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an acyl group having 1 to 20 carbon atoms, an alkoxycarbonyl group having 2 to 20 carbon atoms, an acyloxy group having 1 to 20 carbon atoms, or —N(R10)(R11), wherein R10 represents an acyl group having 1 to 20 carbon atoms, an alkylsulfonyl group having 1 to 20 carbon atoms, or an arylsulfonyl group having 6 to 20 carbon atoms, R11 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, R10 and R11 together with the nitrogen atom to which they are bonded may be joined together to form a ring containing —N—CO— or —N—SO2—, at least one hydrogen atom constituting the alkyl group, the alkoxy group, the acyl group, the alkoxycarbonyl group, the acyloxy group, the alkylsulfonyl group, and the arylsulfonyl group may be replaced by a halogen atom, a hydroxy group, an amino group, or an amino group having a substituent, —O— or —NR20— may be inserted between carbon atoms constituting the alkyl group and the alkoxy group, wherein R20 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms;
• R7 and R8 are substituents other than a hydrogen atom, each independently representing an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen atom, or a cyano group, at least one hydrogen atom constituting the alkyl group having 1 to 4 carbon atoms and the alkoxy group having 1 to 4 carbon atoms may be substituted with a halogen atom or a hydroxy group, p and q are each independently 0;
• R2 represents an acyl group having 1 to 20 carbon atoms, an alkylsulfonyl group having 1 to 20 carbon atoms, or an arylsulfonyl group having 6 to 20 carbon atoms;
• R3 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, R2 and R3 may be joined together to form a ring containing —N—CO— or —N—SO2— together with the nitrogen atom to which they are bonded;
• at least one hydrogen atom constituting the alkyl group, the acyl group, the alkylsulfonyl group, and the arylsulfonyl group may be substituted with a halogen atom, a hydroxy group, an amino group, or an amino group having a substituent, —O— or —NR30— may be inserted between carbon atoms constituting the alkyl group, wherein R30 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms;
• Y represents a group of formula (Y1):
• wherein * represents a bonding site with N;
• R9 are substituents other than a hydrogen atom, each independently representing an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen atom, or a cyano group, at least one hydrogen atom constituting the alkyl group having 1 to 4 carbon atoms and the alkoxy group having 1 to 4 carbon atoms may be substituted with a halogen atom or a hydroxy group;
• r is 0,
• or a group of formula (Y2):
• wherein * represents a bonding site with N;
• P1 and P2 each independently represent —S—, —O—, or —N(R12)—, wherein R12 represents an alkyl group having 1 to 4 hydrogen or carbon atoms;
• Q1 and Q2 each independently represent ═N— or ═CH—.