Patent ID: 11910628
Assignee: MERCK PATENT GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 3:
4. The organic electroluminescent element according to claim 1, wherein the blue phosphorescent compound is represented by the following general formula (1):, wherein M represents Ir or Pt; A1, A2, B1, and B2 each independently represent a carbon atom or a nitrogen atom; ring Z1 represents a 6-membered aromatic hydrocarbon ring, a 5-membered or 6-membered aromatic heterocyclic ring, or an aromatic condensed ring containing at least one of the rings, formed together with A1 and A2; ring Z2 represents a 5-membered or 6-membered aromatic heterocyclic ring or an aromatic condensed ring containing at least one of the rings, formed together with B1 and B2; a carbon atom included in the ring Z1 or the ring Z2 is optionally a carbene carbon atom; one of a bond between A1 and M and a bond between B1 and M is a coordinate bond and the other is a covalent bond; the ring Z1 and the ring Z2, each independently, optionally have a substituent; the substituents of the ring Z1 and the ring Z2 are optionally bonded to form a condensed ring structure or a ligand represented by the ring Z1 and a ligand represented by the ring Z2 are optionally linked; L represents a monoanionic bidentate ligand coordinated to M and optionally has a substituent; m represents an integer of 0 to 2; n represents an integer of 1 to 3; if M is Ir, m+n is 3 and if M is Pt, m+n is 2; and if m or n is 2 or more, ligands represented by each ring Z1 and each ring Z2 or each L is the same or different and the ligands represented by each ring Z1 and each ring Z2 are optionally linked to each L.