Patent WO-2021085460-A1 (WO)
Inventor: KAWAMOTO KAZUNARI
IPC: G09F9/30
Filed: 2020-10-28
Abstract: According to the present invention, a pyrromethene boron complex is represented by general formula (1). Provided are a light-emitting element material and a light-emitting element that have higher light emission efficiency. X 1  and X 2  may be identical or different from each other, and are each selected from the group consisting of 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, a cycloalkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, an aryl group, a heteroaryl group, a halogen, and a cyano group. These functional groups each may further have a substituent. Ar 1 -Ar 4  may be identical or different from each other, and each represent a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group. These aryl groups and heteroaryl groups may be a single ring or a fused ring. However, Ar 1  and/or Ar 2  is a single ring, said single ring includes, as a substituent, at least one secondary alkyl group, at least one tertiary alkyl group, at least one aryl group, or at least one heteroaryl group, or includes, as substituents, a total of two or more of a methyl group and a primary alkyl group. R 1  and R 2  may be identical or different from each other, and each represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group　R 3 -R 5  may be identical or different from each other, and are each 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, an aryl group, a heteroaryl group, a hydroxyl group, a thiol group, an alkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, a halogen, a cyano group, an aldehyde group, an acyl group, a carboxyl group, an ester group, an amide group, a sulfonyl group, a sulfonic acid ester group, a sulfonamide group, an amino group, a nitro group, a silyl group, and a ring structure formed with an adjacent group. These functional groups each may further have a substituent. R 6  and R 7  may be identical or different from each other, and are each 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, an aryl group, a heteroaryl group, a hydroxyl group, a thiol group, an alkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, a halogen, a cyano group, an aldehyde group, an acyl group, a carboxyl group, an ester group, an amide group, a sulfonyl group, a sulfonic acid ester group, a sulfonamide group, an amino group, a nitro group, and a silyl group. However, R 6  may be a crosslinked structure resulting from a covalent bond formed with Ar 4  by one or two atoms therebetween, and R 7  may be a crosslinked structure resulting from a covalent bond formed with Ar 3  by one or two atoms therebetween. These functional groups each may further have a substituent.