| abstract |
Luminescents comprising platinum complexes represented by the general formula [1]: [1] wherein any two of A to C are each independently an optionally substituted nitrogenous aromatic heterocyclic group coordinating to the platinum atom at the nitrogen atom, and the other is optionally substituted aryl or heteroaryl; and Y is halogeno or an optionally substituted aryl or heteroaryl group which is bonded either directly or through oxygen or sulfur (with the proviso that when two adjacent rings are nitrogenous aromatic heterocyclic groups, the cases wherein Y is chloro are excepted, while when two nonadjacent rings are nitrogenous aromatic heterocyclic groups, the cases wherein Y is not halogeno are excepted). |