Composition, optically anisotropic layer, liquid crystal cell, liquid crystal display device, sensor, lens, switching element, isolator, and camera

An optically anisotropic layer comprising:

• at least one specific compound selected from the group consisting of a coloring agent compound having a cationic structure represented by Formula (I) and a reduction body of the coloring agent compound;
• and
• a liquid crystal compound,
• wherein the content of the specific compound is 1 to 30 parts by mass with respect to 100 parts by mass of the liquid crystal compound,
• in Formula (I),
• L101 represents —P(═X)RA—, —SiRA2—, —BRA—, —S(═X)—, or —S(═X)2—, where RA represents a hydrogen atom or a substituent, provided that, in a case of a plurality of RA's, the plurality of RA's may be the same or different from each other, and X represents an oxygen atom, a sulfur atom, or a selenium atom,
• L102 and L103 each independently represent —S— or —X104═X105—, where X104 and X105 represent —N═ or —C(RA)═, and RA represents a hydrogen atom or a substituent,
• X101 and X102 each independently represent —N═ or —C(RA)═, where RA represents a hydrogen atom or a substituent, provided that, in a case where X101 is —C(RA)═, the substituent as one aspect of RA may be bonded to Ar101 to form a ring, and in a case where X102 is —C(RA)═, the substituent as one aspect of RA may be bonded to Ar102 to form a ring,
• X103 represents —N+RB2— or —C+RB—, where RB represents a hydrogen atom, a halogen atom, a hydroxy group, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, an aryl group which may have a substituent, a heteroaryl group which may have a substituent, an alkoxy group which may have a substituent, an aryloxy group which may have a substituent, or an amino group which may have a substituent, provided that, in a case of a plurality of RB's, the plurality of RB's may be the same or different from each other,
• Ar101 and Ar102 each independently represent an alkenylene group which may have a substituent, an arylene group which may have a substituent, or a heteroarylene group which may have a substituent, where the arylene group and the heteroarylene group may be monocyclic or polycyclic, and in a case where the heteroarylene group is polycyclic, at least one of a plurality of ring structures may be a hetero ring,
• Y101 and Y102 each independently represent —ORC, —NRC2, or —SRC, where RC represents a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, an aryl group which may have a substituent, or a heteroaryl group which may have a substituent, provided that, in a case of a plurality of RC's, the plurality of RC's may be the same or different from each other, and the substituent which may be included in the alkyl group, the alkenyl group, the alkynyl group, the aryl group, and the heteroaryl group may be bonded to Ar101 or Ar102 to form a ring, and
• n101 and n102 each independently represent 1 or 2, provided that, in a case where n101 is 2, a plurality of Ar101's may be the same or different from each other, and in a case where n102 is 2, a plurality of Ar102's may be the same or different from each other.

An optically anisotropic layer obtained by fixing an alignment state of a composition which contains at least one specific compound selected from the group consisting of a coloring agent compound having a cationic structure represented by Formula (I) and a reduction body of the coloring agent compound, and a polymerizable liquid crystal compound,

• in Formula (I),
• L101 represents —P(═X)RA—, —SiRA2—, —BRA—, —S(═X)—, or —S(═X)2—, where RA represents a hydrogen atom or a substituent, provided that, in a case of a plurality of RA's, the plurality of RA's may be the same or different from each other, and X represents an oxygen atom, a sulfur atom, or a selenium atom,
• L102 and L103 each independently represent —S— or —X104═X105—, where X104 and X105 represent —N═ or —C(RA)═, and RA represents a hydrogen atom or a substituent,
• X101 and X102 each independently represent —N═ or —C(RA)═, where RA represents a hydrogen atom or a substituent, provided that, in a case where X101 is —C(RA)═, the substituent as one aspect of RA may be bonded to Ar101 to form a ring, and in a case where X102 is —C(RA)═, the substituent as one aspect of RA may be bonded to Ar102 to form a ring,
• X103 represents —N+RB2— or —C+RB—, where RB represents a hydrogen atom, a halogen atom, a hydroxy group, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, an aryl group which may have a substituent, a heteroaryl group which may have a substituent, an alkoxy group which may have a substituent, an aryloxy group which may have a substituent, or an amino group which may have a substituent, provided that, in a case of a plurality of RB's, the plurality of RB's may be the same or different from each other,
• Ar101 and Ar102 each independently represent an alkenylene group which may have a substituent, an arylene group which may have a substituent, or a heteroarylene group which may have a substituent, where the arylene group and the heteroarylene group may be monocyclic or polycyclic, and in a case where the heteroarylene group is polycyclic, at least one of a plurality of ring structures may be a hetero ring,
• Y101 and Y102 each independently represent —ORC, —NRC2, or —SRC, where RC represents a hydrogen atom, an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, an aryl group which may have a substituent, or a heteroaryl group which may have a substituent, provided that, in a case of a plurality of RC's, the plurality of RC's may be the same or different from each other, and the substituent which may be included in the alkyl group, the alkenyl group, the alkynyl group, the aryl group, and the heteroaryl group may be bonded to Ar101 or Ar102 to form a ring, and
• n101 and n102 each independently represent 1 or 2, provided that, in a case where n101 is 2, a plurality of Ar101's may be the same or different from each other, and in a case where n102 is 2, a plurality of Ari02's may be the same or different from each other.