Patent ID: 7670691

Claim:
A cyclometalated transition metal complex represented by Formula I: {[C^N] m M[P(R 1 R 2 )][LR 3 R 4 ] n } z (I) wherein M is a transition metal of Ru, Rh, Ir, Os, Pt or Au; C^N is a cyclometalated ligand; m is 1 or 2; L is PR 5 , NR 5 , AsR 5 , O, S, Se, or Te, R 1 and R 2 are each independently an alkyl group, an aryl group, a heteroaryl group, an amino group, an alkoxy group, an aryloxy group, a heteroaryl group, or an oxyamino group; R 3 , R 4 , and R 5 are each independently a hydrogen atom, an alkyl group, an alkynyl group, an aryl group, an amino group, an alkoxy group, an aryloxy group, an acyl group, an alkoxycarbonyl group, an acyloxy group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfonylamino group, a sulfamoyl group, a carbamoyl group, an arylthio group, a heteroarylthio group, a sulfonyl group, a sulfinyl group, an ureido group, a phosphoramide group, a hydroxy group, a mercapto group, a halogen atom, a cyano group, a sulfo group, a carboxy group, a nitro group, a hydroxamic group, a heterocyclic group, a silyl group, or a phosphino group; P is a phosphonis atom; n is 0 or 1, and m+n=2; and z is 1 or 2.