The invention aims at providing platinum complexes useful as materials for light emitting devices and extremely excellent in heat stability, luminous characteristics, and luminous efficiency, and a process for effective preparation thereof. The invention relates to platinum complexes represented by the general formula [1]:
wherein any two of A, B and C are each independently an optionally substituted nitrogenous aromatic heterocyclic group and the other is optionally substituted aryl or optionally substituted heteroaryl; and Y is halogeno or an optionally substituted aryl or heteroaryl group which is bonded either directly or through oxygen (-O-) or sulfur (-S-) (with the proviso that when the adjacent two rings are nitrogenous aromatic heterocyclic groups, the cases wherein Y is chloro are excepted, while when the nonadjacent two rings are nitrogenous aromatic heterocyclic groups, the cases wherein Y is not halogeno are excepted).
The invention aims at providing platinum complexes useful as materials for light emitting devices and extremely excellent in heat stability, luminous characteristics, and luminous efficiency, and a process for effective preparation thereof. The invention relates to platinum complexes represented by the general formula [1]:
wherein any two of A, B and C are each independently an optionally substituted nitrogenous aromatic heterocyclic group and the other is optionally substituted aryl or optionally substituted heteroaryl; and Y is halogeno or an optionally substituted aryl or heteroaryl group which is bonded either directly or through oxygen (—O—) or sulfur (—S—) (with the proviso that when the adjacent two rings are nitrogenous aromatic heterocyclic groups, the cases wherein Y is chloro are excepted, while when the nonadjacent two rings are nitrogenous aromatic heterocyclic groups, the cases wherein Y is not halogeno are excepted).
Facile Synthesis and Characterization of Phosphorescent Pt(N<sup>∧</sup>C<sup>∧</sup>N)X Complexes
作者:Zixing Wang、Eric Turner、Vanessa Mahoney、Sijesh Madakuni、Thomas Groy、Jian Li
DOI:10.1021/ic100740e
日期:2010.12.20
crossing the spectrum of visible light. Most of the Pt complexes are strongly luminescent (Φ = 0.32−0.63) and have short luminescence lifetimes (τ = 4−7 μs) at room temperature. The lowest excited state of the Pt(N∧C∧N)X complexes is identified as a dominant ligand-centered 3π−π* state with some 1MLCT/3MLCT character, which appears to have a larger 1MLCT component than their bidentate and tridentate analogs