Coloring composition, anisotropic light absorption film, laminate, polarizing plate, image display device and compound
A coloring composition containing one or more species of compounds represented by Formula (I) or Formula (II) below, wherein each of R 1 and R 2 represents a hydrogen atom or substituent, each of Ar 1 to Ar 8 independently represents an optionally substituted aromatic hydrocarbon group or optionally substituted heterocyclic group, and each of L 1 and L 2 independently represents a divalent linking group which interrupts π electron conjugated system:
1. An anisotropic light absorption film comprising: a coloring composition comprising one or more species of compounds represented by Formula (I) or Formula (II) below and one or more species of thermotropic liquid crystalline polymer:
in Formula (I), R 1 represents a hydrogen atom or substituent, each of Ar 1 , Ar 2 , Ar 3 and Ar 4 independently represents an optionally substituted aromatic hydrocarbon group or optionally substituted heterocyclic group, and L 1 represents a divalent linking group which interrupts π electron conjugated system;
in Formula (II), R 2 represents a hydrogen atom or substituent, each of Ar 5 , Ar 6 , Ar 7 and Ar 8 independently represents an optionally substituted aromatic hydrocarbon group or optionally substituted heterocyclic group, and L 2 represents a divalent linking group which interrupts π electron conjugated system,
wherein the thermotropic liquid crystalline polymer is in the form of side-chain polymer liquid crystal.
2. The anisotropic light absorption film of claim 1 , wherein in Formula (I) and Formula (II), each of R 1 and R 2 represents a hydrogen atom.
3. The anisotropic light absorption film of claim 1 , wherein in Formula (I) and Formula (II), each of L 1 and L 2 represents —O(C═O)—, —(C═O)O—, —O—, —CH 2 —, or combination thereof.
4. The anisotropic light absorption film of claim 1 , wherein the compound represented by Formula (I) or Formula (II) is a compound represented by Formula (IA) or (IIA) below:
in Formula (IA), each of R 11 and R 12 independently represents an alkyl group having 1 to 6 carbon atoms or polymerizable group, each of R 13 , R 14 , R 15 and R 16 independently represents a hydrogen atom, alkyl group having 1 to 6 carbon atoms or alkoxy group having 1 to 6 carbon atoms, R 17 represents an alkyl group having 1 to 6 carbon atoms, alkoxy group having 1 to 6 carbon atoms, alkoxycarbonyl group having 2 to 6 carbon atoms, acyl group having 1 to 6 carbon atoms, or polymerizable group, and L 11 represents —O(C═O)—, —CH 2 CH 2 —, —CH 2 O—, —(C═O)O—, or —O—;
in Formula (IIA), R 21 represents —N(R 31 )(R 32 ), alkyl group having 1 to 6 carbon atoms, alkoxycarbonyl group having 2 to 6 carbon atoms, or polymerizable group, each of R 22 , R 23 , R 24 and R 25 independently represents a hydrogen atom, alkyl group having 1 to 6 carbon atoms or alkoxy group having 1 to 6 carbon atoms, R 26 represents an alkyl group having 1 to 6 carbon atoms, alkoxy group having 1 to 6 carbon atoms, alkoxycarbonyl group having 2 to 6 carbon atoms, or —N(R 41 )(R 42 ), and L 12 represents —O(C═O)—, —CH 2 CH 2 —, —OCH 2 —, or —(C═O)O—, where each of R 31 and R 32 independently represents an alkyl group having 1 to 6 carbon atoms or polymerizable group, and each of R 41 and R 42 independently represents an alkyl group having 1 to 6 carbon atoms.
5. The anisotropic light absorption film of claim 1 , further comprising one or more species of coloring compounds other than the compound represented by Formula (I) or Formula (II).
6. The anisotropic light absorption film of claim 5 , wherein each of the one or more species of coloring compounds other than the compound represented by Formula (I) or Formula (II) have a wavelength of maximum absorbance of 400 to 600 nm.
7. The anisotropic light absorption film of claim 5 , wherein each of the one or more species of coloring compounds other than the compound represented by Formula (I) or Formula (II) is a compound represented by Formula (III) or Formula (IV) below:
in Formula (III), each of Ar 11 , Ar 12 , Ar 13 and Ar 14 independently represents an optionally substituted aromatic hydrocarbon group or optionally substituted heterocyclic group, and L 3 represents a divalent linking group,
in Formula (IV), each of Ar 15 and Ar 16 independently represents an optionally substituted aromatic hydrocarbon group or optionally substituted heterocyclic group.
8. The anisotropic light absorption film of claim 1 , wherein the thermotropic liquid crystalline polymer is a polymer at least having a repeating unit represented by any one of Formulae (IX-a), (IX-b) and (IX-c) below:
in Formulae (IX-a), (IX-b) and (IX-c), R 1 represents a hydrogen atom or methyl group; L represents a single bond, —(CH 2 ) X1 O— or —(CH 2 CH 2 O) y1 —, where x1 represents an integer of 2 to 10, y1 represents an integer of 1 to 5, R 2 represents a hydrogen atom, alkyl group having 1 to 10 carbon atoms, alkoxy group having 1 to 9 carbon atoms, cyano group, or optionally substituted amino group; m1 represents an integer of 0 to 2; m2 represents an integer of 1 to 2; each of R a , R b and R c independently represents a substituent; and each of x, y and z independently represents an integer of 0 to 4.
9. The anisotropic light absorption film of claim 1 , further comprising a horizontal alignment agent.
10. The anisotropic light absorption film of claim 1 , which is formed on a surface of an alignment film.
11. A laminate comprising an alignment film and the anisotropic light absorption film of claim 1 .
12. A polarizing plate comprising at least the anisotropic light absorption film of claim 1 .
13. A polarizing plate comprising at least the laminate of claim 11 .
14. An image display device comprising the anisotropic light absorption film of claim 1 .
15. An image display device comprising the laminate of claim 11 .
16. An image display device comprising the polarizing plate of claim 12 .
17. An image display device comprising the polarizing plate of claim 13 .