Patent ID: 8084145

Claim:
An organometallic complex represented by the following general formula (4), wherein R 1 is an alkyl group, wherein Ar is one of an aryl group having an electron-withdrawing group and a heterocyclic group having an electron-withdrawing group, wherein R 2 and R 3 are individually any one selected from the group consisting of a hydrogen atom, a halogen atom, an acyl group, an alkyl group, an alkoxyl group, an aryl group, a cyano group, and a heterocyclic group, wherein M is one of an element of Group 9, wherein n=2, and wherein L is any one of a monoanionic ligand having a β-diketone structure, a monoanionic bidentate ligand having a carboxyl group, and a monoanionic bidentate ligand having a phenolic hydroxyl group.