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Citation: SUN Wei, ZHANG Qi-Sheng, CHENG Yan-Xiang, XIE Zhi-Yuan, LU Can-Zhong, WANG Li-Xiang. Phosphorescent Cuprous Complexes with 2-Pyridylmethyldiphenylphosphine:Synthesis,Photophysical Properties and Electroluminescence[J]. Chinese Journal of Applied Chemistry, ;2010, 27(12): 1403-1408. doi: 10.3724/SP.J.1095.2010.00128 shu

Phosphorescent Cuprous Complexes with 2-Pyridylmethyldiphenylphosphine:Synthesis,Photophysical Properties and Electroluminescence

a. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;
b. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou;
c. Graduate School, Chinese Academy of Sciences, Beijing

Received Date: 4 March 2010
Revised Date: 24 April 2010

Three novel cuprous complexes of[Cu(L)₂](BF₄)(a),[LCu(PPh₃)₂](BF₄)(b) and[LCu(POP)](BF₄)(c)(L=2-pyridylmethyldiphenylphosphine,POP=bis[2-(diphenylphosphino) phenyl] ether) have been prepared,and characterized by ¹H NMR,³¹P NMR,elemental analysis,and X-ray single-crystal diffraction. X-ray diffraction studies have revealed that the central Cu(Ⅰ) ions of all complexes have a distorted tetrahedral coordination geometry. The complexes show intense π-π^* absorption bands in the range of 261~274 nm in deaerated CH₂Cl₂ solution,while no characteristic metal-ligand charge transfer(MLCT) transition bands appear obviously. In rigid polymethylmethacrylate(PMMA) matrix,these Cu^Ⅰ complexes show intense blue emission at 515,476,and 481 nm,with a quantum efficiency of 16.0%,12.9% and 7.0%,respectively. Multilayer organic light-emitting diodes(OLEDs) using poly(N-vinylcarbazole)(PVK) and complex b were fabricated. A current efficiency of 0.36 cd/A and the maximum brightness of 217 cd/m² have been achieved at current density of 1.0 × 10^-3 A/cm².
- organic light-emitting,
- phosphorescence,
- Cu(Ⅰ) complexes,
- N^P ligand
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