Patent ID: 11930699
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A compound comprising a ligand LA of Formula I, , wherein:
A is a 5-membered or 6-membered carbocyclic or heterocyclic ring;
Z1 and Z2 are each independently C or N;
K3 and K4 are each independently a direct bond, O, or S;
X1, X2, and X3 are each independently C or N, at least one of X1, X2, and X3 is C;
X is O or NR′;
RA and RB each represents zero, mono, or up to the maximum number of allowed substitutions to its associated ring;
each of R, R′, RA, and RB is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and
two adjacent groups can be joined or fused to form a ring wherever chemically feasible, wherein the ligand LA is complexed to a metal M to form a chelate ring as indicated by the two dotted lines;
the metal M can be coordinated to other ligands; and
the ligand LA can be linked with other ligands to form a tridentate, tetradentate, pentadentate, or hexadentate ligand.