Patent ID: 7851072

Claim:
A compound having the formula: wherein M is iridium; (X—Y) is an ancillary ligand; m is a value from 1 to the maximum number of ligands that may be attached to the metal; and m+n is the maximum number of ligands that may be attached to the metal; ring A is an aromatic heterocyclic or a fused aromatic heterocyclic ring having at least one nitrogen atom, N, that is coordinated to the metal M; wherein R′ 4 is an alkyl; and wherein R′ 3 and R′ 6 is each independently H, alkyl, alkenyl, alkynyl, heteroalkyl, aryl, heteroaryl, or aralkyl; and wherein R′ 5 is H, aryl, or heteroaryl; ring B is an aromatic ring with at least one carbon atom coordinated to metal M, wherein R 7 represents one or more optional substitutions located on any position of the phenyl ring attached to ring B, wherein the optional R 7 substitutions are all fluoro or all alkyl; R 3 , R 4 , and R 6 are each independently selected from the group consisting of H, alkyl, alkenyl, alkynyl, alkylaryl, CN, CO 2 R, C(O)R, NR 2 , NO 2 , OR, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, and a heterocyclic group; each R is independently H, alkyl, alkenyl, alkynyl, heteroalkyl, aryl, heteroaryl, or aralkyl; wherein each R is optionally substituted by one or more substituents Z; each Z is independently a halogen, R′, OR′, N(R′) 2 , SR′, C(O)R′, C(O)OR′, C(O)N(R′) 2 , CN, SO 2 , SOR′, SO 2 R′, or SO 3 R′; and each R′ is independently H, alkyl, alkenyl, alkynyl, heteroalkyl, aryl, or heteroaryl.