Curable composition, cured film, optical filter, laminate, solid image pickup element, image display device, and infrared sensor

1. A curable composition comprising:

a near infrared absorbing compound that includes a cation having an absorption in a near infrared range and an anion;

a salt of an anion that is a component other than the near infrared absorbing compound and has a conjugate acid pKa of −8 or lower; and

a curable compound.

2. The curable composition according to claim 1 ,

wherein the near infrared absorbing compound includes the cation having an absorption in a near infrared range, and an anion that is present outside a molecule of the cation having an absorption in a near infrared range.

3. The curable composition according to claim 1 ,

wherein the salt of the anion having a conjugate acid pKa of −8 or lower does not have a maximum absorption wavelength in a visible range.

4. The curable composition according to claim 1 ,

wherein a molecular weight of the salt of the anion having a conjugate acid pKa of −8 or lower is 100 to 2000.

5. The curable composition according to claim 1 ,

wherein a content of the salt of the anion having a conjugate acid pKa of −8 or lower is 0.05 to 5 mol with respect to 1 mol of the near infrared absorbing compound.

6. The curable composition according to claim 1 ,

wherein the near infrared absorbing compound is at least one selected from the group consisting of a cyanine compound and a diimmonium compound.

7. The curable composition according to claim 1 ,

wherein the near infrared absorbing compound is at least one selected from the group consisting of a compound represented by the following Formula (A1) and a compound represented by the following Formula (A2),

in Formula (A1), Z 1 and Z 2 each independently represent a non-metal atomic group for forming a 5- or 6-membered nitrogen-containing heterocycle which may be fused, R 1 and R 2 each independently represent an aliphatic group or an aromatic group, L 1 represents a methine chain including an odd number of methine groups, a and b each independently represent 0 or 1, and X 1 represents an anion; and

in Formula (A2), R 11 to R 18 each independently represent an alkyl group or an aryl group, V 11 to V 15 each independently represent an alkyl group, an aryl group, a halogen atom, an alkoxy group, or a cyano group, X 2 represents an anion, and n1 to n5 each independently represent an integer of 0 to 4.

8. The curable composition according to claim 1 ,

wherein the near infrared absorbing compound includes an anion having a conjugate acid pKa of −8 or lower.

9. The curable composition according to claim 1 ,

wherein the salt of the anion having a conjugate acid pKa of −8 or lower is at least one selected from the group consisting of a salt of an anion having a partial structure represented by the following Formula (B1), a salt of an anion having a partial structure represented by the following Formula (B2), and a salt of an anion represented by the following Formula (B3),

in Formula (B1), R 111 and R 112 each independently represent —SO 2 — or —CO—;

in Formula (B2), R 113 represents —SO 2 — or —CO— and R 114 and R 115 each independently represent —SO 2 —, —CO—, or a cyano group; and

in Formula (B3), R 116 to R 119 each independently represent a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, or a cyano group.

10. The curable composition according to claim 1 ,

wherein the salt of the anion having a conjugate acid pKa of −8 or lower is at least one selected from the group consisting of a salt of an anion represented by the following Formula (B1-1), a salt of an anion represented by the following Formula (B2-1), and a salt of an anion represented by the following Formula (B3),

in Formula (B1-1), R 211 and R 212 each independently represent a halogen atom or an alkyl group, and in a case where R 211 and R 212 each independently represent an alkyl group, R 211 and R 212 may be bonded to each other to form a ring;

in Formula (B2-1), R 213 to R 215 each independently represent a halogen atom or an alkyl group,

in a case where R 213 and R 214 each independently represent an alkyl group, R 213 and R 214 may be bonded to each other to form a ring,

in a case where R 214 and R 215 each independently represent an alkyl group, R 214 and R 215 may be bonded to each other to form a ring, and

in a case where R 213 and R 215 each independently represent an alkyl group, R 213 and R 215 may be bonded to each other to form a ring; and

in Formula (B3), R 116 to R 119 each independently represent a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, or a cyano group.

11. The curable composition according to claim 1 ,

wherein the salt of the anion having a conjugate acid pKa of −8 or lower is at least one selected from the group consisting of a bis(fluoroalkylsulfonyl)imide salt, a tris(fluoroalkylsulfonyl)methide salt, and a tetracyanoborate salt.

12. A cured film which is formed using the curable composition according to claim 1 .

13. An optical filter comprising:

the cured film according to claim 12 .

14. The optical filter according to claim 13 ,

wherein the optical filter is a near infrared cut filter or an infrared transmitting filter.

15. The optical filter according to claim 13 comprising:

a pixel of the cured film formed using a curable composition; and

at least one pixel selected from the group consisting of a red pixel, a green pixel, a blue pixel, a magenta pixel, a yellow pixel, a cyan pixel, a black pixel, and an achromatic pixel,

wherein the curable composition includes,

a near infrared absorbing compound that includes a cation having an absorption in a near infrared range and an anion;

a salt of an anion that is a component other than the near infrared absorbing compound and has a conjugate acid pKa of −8 or lower; and

a curable compound.

16. A laminate comprising:

the cured film according to claim 12 ; and

a color filter that includes a chromatic colorant.

17. A solid image pickup element comprising:

the cured film according to claim 12 .

18. An image display device comprising:

the cured film according to claim 12 .

19. An infrared sensor comprising:

the cured film according to claim 12 .