| abstract |
A first platinum complex in which two bidentate ligands are coordinated with platinum, wherein each of the two bidentate ligands has an imino moiety, nitrogen atoms in the imino moieties are coordinated with platinum at a trans position with respect to each other, and the two bidentate ligands have different structures from each other; or a second platinum complex in which a quadridentate ligand is coordinated with platinum, wherein the quadridentate ligand has two bidentate ligands that are linked to each other through crosslinking, each of the two bidentate ligands has an imino moiety, nitrogen atoms in the imino moieties are coordinated with platinum at a trans position with respect to each other, and the two bidentate ligands have different structures from each other. |