A compound including a first ligand LX of Formula II
is disclosed, where 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 at least one ring is 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 can be one of BR′, NR′, PR′, O, S, Se, C═O, S═O, SO2, CR′R″, SiR′R″, and GeR′R″; 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.
一种化合物,包括式 II 的第一
配体 LX
其中 F 为 5 元或 6 元碳环或杂环;RF 和 RG 各自独立地代表单取代至最大可能取代数,或不代表取代;Z3 和 Z4 各自独立地为 C 或 N,并与
金属 M 配位以形成 5 元螯合环;G 为融合环结构,包括 5 个或更多个融合杂环或碳环,其中至少一个环为式 III
融合环结构 G 中的融合杂环或碳环为 5 元环或 6 元环;其中,如果存在两个或更多 5 元环,则至少有两个 5 元环相互融合;Y可以是BR′、NR′、PR′、O、S、Se、C═O、S═O、SO2、CR′R″、SiR′R″和GeR′R″中的一种;
金属M可以与其他
配体配位;
配体 LX 可以与其他
配体连接,组成三齿、四齿、五齿或六齿
配体。