Patent ID: 7838669

Claim:
A compound of the following formula (IV): L 111 , L 112 , L 121 , L 122 , L 131 , L 141 and L 142 each independently represents —O—, —N(R 211 )—, —S—, —C(R 212 )(R 213 )—, —CO—, —CO—N(R 214 )—, —SO—, —SO 2 —, —SO 2 N(R 215 ), or a group of their combinations; R 211 , R 212 , R 213 , R 214 and R 215 each independently represents a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group; Q 111 , Q 112 , Q 121 , Q 122 , Q 131 , Q 132 , Q 141 and Q 142 each independently represents a non-metallic atomic group consisting of atoms selected from C, N, O and S and necessary for forming a 5-membered or 6-membered hetero ring along with the nitrogen atom thereof; R 113 , R 123 , R 133 and R 143 each independently represents a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkylthio group or an arylthio group; n113, n123, n133 and n143 each independently indicates an integer of from 0 to 4; and M 2 represents two hydrogen atoms, two monovalent metal atoms, a divalent metal atom, or a divalent substituted metal atom including a trivalent or tetravalent metal atom.