Near-infrared absorbing composition, near-infrared absorbing film and image sensor for solid-state imaging elements

A near-infrared ray absorbing composition comprising a near-infrared absorber and a solvent, wherein the near-infrared absorber contains at least one of the following component (A) and component (B);

• and a compound having a structure represented by Formula (I) is contained in the component (A) or component (B) in the range of 0.001 to 10% by mass based on the total mass of the near-infrared ray absorbing composition,
• Component (A):
• a component composed of at least one of a compound having a structure represented by Formula (1) or Formula (2) with a compound having a structure represented by Formula (I) and a copper ion
• Component (B):
• a component composed of a copper complex obtained by reaction of at least one of a compound having a structure represented by Formula (1) or Formula (2) with a compound having a structure represented by Formula (I) and a copper compound,
• O═P—(OH)3 Formula (I):
• in the above Formula (1), R represents at least one group selected from the Formulas (A) to (H) and (J);
• n represents 1 or 2, and when n represents 1, a plurality of R may be the same or different,
• in the above Formula (2), R′ represents an alkyl group, an aryl group, an aralkyl group, or an alkenyl group each having 1 to 18 carbon atoms, and the total carbon atom number is in the range of 1 to 36;
• n′ represents 1 or 2, and when n′ represents 1, a plurality of R′ may be the same or different,
• in the above Formulas (A) to (H) and (J), R11 to R19 each respectively represent an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 6 to 20 carbon atoms (provided that at least one hydrogen atom bonded to a carbon atom constituting an aromatic ring may be substituted with an alkyl group having 1 to 6 carbon atoms, or a halogen);
• R21 to R30 each respectively represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms;
• R31 and R32 each respectively represent an alkylene group having 1 to 6 carbon atoms;
• R41 represents an alkylene group having 1 to 10 carbon atoms;
• R51 and R52 each respectively represent an alkylene group having 1 to 20 carbon atoms;
• and R53 and R54 each respectively represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, provided that one of R53 and R54 is always a hydrogen atom, and both of R53 and R54 are not a hydrogen atom at the same time;
• m represents an integer of 1 to 12, k represents an integer of 0 to 5, p represents an integer of 1 to 10, and r represents an integer of 1 to 10.