Patent ID: 8147988

Claim:
A platinum complex represented by General Formula (1) below wherein in Formula (1) Pt represents a tetravalent platinum atom; the ring structure A represents a cyclic substituent having a carbon atom that forms a covalent bond with Pt, and wherein the ring structure A may also optionally contain a halogen atom, a nitro group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, a disubstituted amino group, or a linear or branched alkyl group having 1 to 20 carbon atoms; the ring structure B represents a cyclic substituent having Q that forms a coordination bond with Pt, wherein Q is a carbon atom, a nitrogen atom, or a phosphorous atom, and wherein the ring structure B may also optionally contain a halogen atom, a nitro group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, a disubstituted amino group, or a linear or branched alkyl group having 1 to 20 carbon atoms; wherein, optionally, a new ring structure may be formed by binding a substituent of the ring structure A to a substituent of the ring structure B; X1 represents a monovalent-bidentate ligand; and X2 represents a divalent-bidentate ligand having a carbon atom and an oxygen atom that form covalent bonds with the platinum atom.