| abstract |
The present invention provides a polymeric light emitting substance having a polystyrene reduced number-average molecular weight of from 10 3 to 10 8 which comprises a metal complex structure showing light emission from the triplet excited state at at least one of the ends of the main chain, wherein the metal complex structure showing light emission from the triplet excited state is of formula (6):n nwherein M represents a metal atom having an atomic number of 50 or more and showing a possibility of intersystem crossing between the singlet state and the triplet state in this complex by a spin-orbital mutual action; Ar represents a ligand bonded to M via one or more of a nitrogen atom, oxygen atom, carbon atom, sulfur atom and phosphorus atom, with bonding to a polymer at an arbitrary position; L represents a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms, carboxylate group having 1 to 10 carbon atoms, diketonate group having 1 to 10 carbon atoms, halogen atom, amide group, imide group, alkoxide group, alkylmercapto group, carbonyl ligand, arylene ligand, alkene ligand, alkyne ligand, amine ligand, imine ligand, nitrile ligand, isonitrile ligand, phosphine ligand, phosphine oxide ligand, phosphite ligand, ether ligand, sulfone ligand, sulfoxide ligand or sulfide ligand; m represents an integer of 1 to 5; and o represents an integer of 0 to 5. |