Pyrromethene-boron complex, color conversion composition, color conversion sheet, color conversion substrate, light source unit, display device, and lighting device

A pyrromethene-boron complex which is a compound of the following general formula (1):

• (wherein in the general formula (1), X is C—R7 or N;
• R1 and R3 are aryl groups which are different from each other;
• each of R2 and R4 to R9, which may be the same as or different from one another, is selected from the group consisting of a hydrogen atom, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a thiol group, an alkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, an aryl group, a heteroaryl group, halogen, a cyano group, an aldehyde group, a carbonyl group, a carboxyl group, an oxycarbonyl group, a carbamoyl group, an amino group, a nitro group, a silyl group, a siloxanyl group, a boryl group, and a phosphine oxide group, provided that one of two pairs:
• R4 and R5, and R5 and R6, has a ring structure of any one of the following general formulas (2A) to (2D):
• (wherein in the general formulas (2A) to (2D), R101, R102, and R201 to R204 are the same as R2, and R4 to R9 in said general formula (1);
• Ar is a substituted or unsubstituted aromatic hydrocarbon ring, or a substituted or unsubstituted aromatic heterocycle;
• R101 and R102 may form a ring;
• and the symbol * indicates a connection with the pyrromethene skeleton)).