2-[(二苯基膦基)甲基]吡啶铜(I)配合物的合成及光物理和电致发光性质

合成了3个2-(二苯基膦基)甲基]吡啶(L)铜(Ⅰ)配合物：Cu(L)2(BF4)(a)、Cu(L)(PPh3)2(BF4)(b)和Cu(L)(POP)(BF4)(c)(POP为双(2-二苯膦基)苯基]醚)，其组成和结构分别经1H NMR、31P NMR、元素分析及晶体结构分析确证。 分子中，中心铜(Ⅰ)离子均为扭曲的四面体配位构型。 在除气的二氯甲烷溶液中，配合物均出现261~274 nm强π-π*吸收，未见明显的Cu→L电荷转移(MLCT)跃迁吸收。 配合物的薄膜样品发射蓝绿光，最大发射峰分别在515、476和481 nm处，光致发光效率分别为16.0%、12.9%和7.0%。 以聚乙烯咔唑(PVK)与配合物b为发光层的多层电致发光器件，当电流密度为1.0×10-3 A/cm2时，电致发光的电流效率为0.36 cd/A，最大亮度为217 cd/m2。

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

Three novel cuprous complexes of Cu(L)2](BF4)(a), LCu(PPh3)2](BF4)(b) and LCu(POP)](BF4)(c)(L=2-pyridylmethyldiphenylphosphine, POP=bis2-(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 CuⅠ 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.