Patent ID: 8871361

Claim:
A compound having the formula: wherein A is a 5-membered carbocyclic or heterocyclic ring and B is a 5-membered or 6-membered carbocyclic or heterocyclic ring; wherein A-B connects to Pt through one covalent bond and one covalent bond and one coordination bond; wherein X is selected from the group consisting of BR, NR, PR, O, S, Se, C═O, S═O, SO 2 , CRR′, SiRR′, and GeRR′; wherein R and R′ are independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; wherein R 3 may represent mono, di, or tri substitutions; wherein R 1 may represent mono or di substitutions: wherein R 1 , R 2 , and R 3 are independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; wherein two adjacent substituents of R 1 , R 2 , and R 3 are optionally joined to form a fused ring; wherein at least one of R 1 and R 2 is: wherein R′ 1 and R′ 2 are independently selected from the group consisting of alkyl and aryl; and wherein C is a 5-membered or 6-membered carbocyclic or heterocyclic ring that is optionally further substituted.