| 主权项 |
1. A light up-conversion luminescent substance comprising a compound represented by the following general formula (1): wherein group A represents a bivalent moiety of a polycyclic aromatic compound with 3 to 5 condensed rings optionally having a substituent; Group B1 and group B2 each independently represent a trivalent group represented by the following general formula (2a) or (2b): wherein in each of general formulas (2a) and (2b), group Z binds to group A, the remaining two binding hands bind to group X1 and group X2, and group Z represents a single bond, or a saturated or unsaturated, straight-chain or branched-chain alkylene group; Rn2 is 0 to 3 substituents which substitute for a hydrogen atom on a benzene ring and each independently represent an alkyl group, an alkoxy group, a phenyl group, a hydroxyl group, or an amino group; and Group X1 and group X2 each independently represent a straight-chain or branched-chain alkylene group with a carbon number of two or more, optionally having at least one bond selected from the group consisting of an ether bond, an ester bond, an amide bond, and a sulfide bond. |
