Patent ID: 8383249

Claim:
An organic light emitting device, comprising: an anode; a cathode; and a phosphorescent emissive region disposed between the anode and the cathode, wherein the emissive material has the formula IV: wherein: M is a second or third row transition metal; dotted lines represent optional double bonds; X 2 is selected from C—R 2 or N; R 2 is selected from H, alkyl, alkenyl, alkynyl, aralkyl, O—R′, N(R′) 2 , SR′, C(O)R′, C(O)OR′, C(O)NR′ 2 , CN, CF 3 , NO 2 , SO 2 R′, SOR′, SO 3 R′, Si(R″) 3 , halo, aryl and heteroaryl; R 5 is selected from H, alkyl, alkenyl, alkynyl, aralkyl, O—R′, N(R′) 2 , SR′, C(O)R′, C(O)OR′, C(O)NR′ 2 , CN, CF 3 , NO 2 , SO 2 R′, SOR′, SO 3 R′, Si(R″) 3 , halo, aryl and heteroaryl; R 7 is selected from H, alkyl, alkenyl, alkynyl, aralkyl, O—R′, N(R′) 2 , SR′, C(O)R′, C(O)OR′, C(O)NR′ 2 , CN, CF 3 , NO 2 , SO 2 R′, SOR′, SO 3 R′, Si(R″) 3 , halo, aryl and heteroaryl; R 12 is selected from alkyl, aryl, aralkyl, cycloalkyl and C(O)R′; R 13 and R 14 are independently selected from H, alkyl, alkenyl, alkynyl, aralkyl, O—R′, N(R′) 2 , SR′, C(O)R′, C(O)OR′, C(O)NR′ 2 , CN, CF 3 , NO 2 , SO 2 R′, SOR′, SO 3 R′, Si(R″) 3 , halo, aryl and heteroaryl; additionally or alternatively R 13 and R 14 form a fused 5- or 6- membered cyclic group, wherein the fused cyclic group is optionally substituted with one of more substituents selected from alkyl, alkenyl, alkynyl, aralkyl, O—R′, N(R′) 2 , SR′, C(O)R′, C(O)OR′, C(O)NR′ 2 , CN, CF 3 , NO 2 , SO 2 R′, SOR′, SO 3 R′, Si(R″) 3 , halo, aryl and heteroaryl; R 22 is selected from alkyl, aryl, aralkyl, cycloalkyl and C(O)R′; R 23 and R 24 are independently selected from H, alkyl, alkenyl, alkynyl, aralkyl, O—R′, N(R′) 2 , SR′, C(O)R′, C(O)OR′, C(O)NR′ 2 , CN, CF 3 , NO 2 , SO 2 R′, SOR′, SO 3 R′, Si(R″) 3 , halo, aryl and heteroaryl; additionally or alternatively R 23 and R 24 form a fused 5- or 6- membered cyclic group, wherein the fused cyclic group is optionally substituted with one of more substituents selected from alkyl, alkenyl, alkynyl, aralkyl, O—R′, N(R′) 2 , SR′, C(O)R′, C(O)OR′, C(O)NR′ 2 , CN, CF 3 , NO 2 , SO 2 R′, SOR′, SO 3 R′, Si(R″) 3 , halo, aryl and heteroaryl; each R′ is independently selected from H, alkyl, alkenyl, alkynyl, aralkyl, aryl and heteroaryl; and each R″ is independently selected from H, alkyl, alkenyl, alkynyl and aralkyl.