Patent ID: 7482451

Claim:
A compound represented by the Formula (I) wherein is a cyclometallated ligand, M is a metal with an atomic weight of greater than 40, X and Y are each an independently selected from pyrazoles, tetrazoles, thiazoles, furans and pyridines, Z is a group of the formula JR′ p R″ q wherein J is hydrogen or a metal or a non-metal, R′ and R″ are independently, alkenyl, heteroaryl, hydroxy, alkoxy, aryloxy, amino, alkylamino, arylamino, sulfido, alkylsulfido, arylsulfido, phophino, alkylphosphino or arylphosphino and p and q are integers between 0 and 2. m and n are integers selected from 1 and 2 wherein the sum of n+m is 3, with the proviso that is anionic.