Patent ID: 8586203

Claim:
A compound comprising a monoanionic bidentate ligand L having the structure: wherein A is pyridine; wherein X 1 is nitrogen; wherein X 2 , X 4 and X 6 are selected from the group consisting of carbon, nitrogen and boron, wherein X 3 is nitrogen or boron; wherein, when X 3 is boron, one of X 2 , X 4 and X 6 is nitrogen and the other two of X 2 , X 4 and X 6 are each carbon; wherein, when X 3 is nitrogen, one of X 2 , X 4 and X 6 is boron and the other two of X 2 , X 4 and X 6 are each carbon; wherein X 5 and X 7 are carbon; wherein R 1 and R 2 represent mono, di, tri, or tetra substitutions; wherein R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, aralkyl, aryl, and heteroaryl; and wherein X 1 and X 2 are coordinated to iridium.