Metal complexes of cyclometallated imidazo(1,2-f) phenanthridine and diimidazo(1,2-A;1',2'-C)quinazoline ligands and isoelectronic and benzannulated analogs therof

摘要

A compound comprising a phosphorescent metal complex comprising a monoanionic, bidentate ligand selected from Set 1, wherein the metal is selected from the group consisting of the non-radioactive metals with atomic numbers greater than 40, and wherein the bidentate ligand may be linked with other ligands to comprise a tridentate, tetradentate, pentadentate or hexadentate ligand; E 1a-q are selected from the group - consisting of C and N and collectively comprise an 18 pi-electron system; provided that E 1a and E 1p are different; and R 1a-i are each, independently, H, hydrocarbyl, heteroatom substituted hydrocarbyl, cyano, fluoro, OR 2a , SR 2a , NR 2a R 2b , BR 2a R 2b , or SiR 2a R 2b R 2c , where R 2a-c are each, independently, hydrocarbyl or heteroatom substituted hydrocarbyl, and where any two of R 1a-i and R 2a-c may be linked to form a saturated or unsaturated, aromatic or non-aromatic ring; provided that R 1a-i is other than H when attached to N. The compounds are used in OLED devices.