CPC C07F 15/0033 (2013.01) [H10K 85/342 (2023.02)] | 20 Claims |
1. A compound comprising a first ligand LX of Formula II
wherein,
F is a 5-membered or 6-membered carbocyclic or heterocyclic ring;
each RF and RG independently represents mono to the maximum possible number of substitutions, or no substitution;
Z3 and Z4 are each independently C or N and coordinated to a metal M to form a 5-membered chelate ring;
G is a fused ring structure comprising five or more fused heterocyclic or carbocyclic rings, of which one or two rings are of Formula III
the fused heterocyclic or carbocyclic rings in the fused ring structure G are 5-membered or 6-membered; of which if two or more 5-membered rings are present, at least two of the 5-membered rings are fused to one another;
Y is selected from the group consisting of BR′, NR′, PR′, O, S, Se, C═O, S═O, SO2, CR′R″, SiR′R″, and GeR′R″;
each R′, R″, RF, and RG is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, boryl, and combinations thereof;
the metal M can be coordinated to other ligands; and
the ligand LX can be linked with other ligands to comprise a tridentate, tetradentate, pentadentate, or hexadentate ligand, with the proviso that when triphenylene is fused to Formula III, Y═O.
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