Patent ID: 11970508
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A compound comprising a ligand LA of Formula I:, , wherein:
Z2 is C or N;
A2 is a monocyclic or multicyclic fused ring system comprising one or more 5-membered or 6-membered carbocyclic or heterocyclic rings;
A1 comprises a multicyclic fused ring system comprising one six-membered aromatic ring with three N atoms connecting to each other, and the remaining three C atoms connecting to each other, wherein Z1 is one of the three N atoms connecting to each other;
L is selected from the group consisting of a direct bond, BR, NR, PR, O, S, Se, C═O, S═O, SO2, CR′R″, SiR′R″, GeR′R″, and combinations thereof;
R1 and R2 each represents mono to the maximum allowable substitution, or no substitution;
R1, R2, R, R′ and R″ are each independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, boryl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
the ligand LA complexes to a metal M through the dashed lines to form a 5-membered chelate ring;
M is selected from the group consisting of Os, Ir, Rh, Re, Ru, Pd, Pt, Cu, Ag, and Au;
M can be coordinated to other ligands;
LA can be linked with other ligands to comprise a tridentate, tetradentate, pentadentate, or hexadentate ligand; and
any two adjacent R1, R2, R, R′ and R″ can be joined or fused together to form a ring.