Patent ID: 8119037

Claim:
A square planar transition metal complex, wherein the metal complex comprises a compound of one of the following formulas (I) or (II): wherein M is a transition metal selected from the groups 8 to 12 of the periodic system of the elements; X 1 , X 2 ,X 3 , and X 4 are independently selected from S, Se, NR5, and PR5, wherein R5 is selected from the group consisting of, substituted or unsubstituted, linear or branched alkyl, cycloalkyl, aryl, heteroaryl, condensed aromatic rings, donor groups, and acceptor groups; R1 and R2 are different from one another and/or R3 and R4 are different from one another, wherein R1, R2, R3 and R4 are otherwise independently selected from the group consisting of singly or multiply halogenated aromatic structures, singly or multiply halogenated heteroaromatic structures, singly or multiply cyanated aromatic structures, singly or multiply cyanated heteroaromatic structures, cyanated halogen aromatics, cyanated halogen heteroaromatics, halogenated hydrocarbons, cyano, and halogenated aliphatic nitrile compounds, wherein the halogenated hydrocarbons are aliphatic, linear, branched, or cyclic; and L1 and L2 are independently selected from the group consisting of alkylated amine, aromatic amine, alkylated phosphine, aromatic phosphine, halogen, pseudohalogen, NCS, SCN, and CN.