Patent ID: 7338722

Claim:
A compound, having the structure: wherein M is a metal having an atomic weight greater than 40; (C—N) is a substituted or unsubstituted cyclometallated ligand, and (C—N) is different from at least one other ligand attached to the metal; each R 8 , R 10 , and R 12 to R 14 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, alkylaryl, CN, CF 3 , NO 2 , halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; additionally or alternatively, any two adjacent substituted positions together form, independently, a fused 4- to 7-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl, and wherein the 4- to 7-member cyclic group may be optionally substituted with a substituent independently selected from hydrogen, alkyl, alkenyl, alkynyl, alkylaryl, CN, CF 3 , NO 2 , halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; m has a value of at least 1; n has a value of at least 1; and m+n is the maximum number of ligands that may be attached to the metal.