Multidentate dinuclear cyclometallated complexes containing phenylpyridine and its analogues
Disclosed herein are multidentate dinuclear cyclometallated complexes. The complexes are suitable as emitting materials or host materials in OLED devices, the materials having one of the following structures:
1. A compound of Formula I:
wherein each of M 1 and M 2 is independently a platinum or palladium;
wherein each of L 1 and L 2 is independently a heteroaryl ring;
wherein V 1 , V 2 , V 3 , V 4 , V 5 , V 6 , V 7 and V 8 are coordinated with M 1 or M 2 ; and V 1 , V 4 , V 5 , and V 8 are N, V 2 , V 3 , V 6 , V 7 and V 8 are C;
wherein each of Y 1 , Y 2 , and Y 3 is independently a C;
wherein each of A 1 and A 2 is independently an O;
wherein X is independently a N;
wherein each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 is independently a hydrogen.
2. The compound of claim 1 , wherein the compound has a neutral charge.