摘要
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1HNMR、31PNMR、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261~274nm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481nm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1.0×10-3A/cm2时,电致发光的电流效率为0.36cd/A,最大亮度为217cd/m2。
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 CH2 Cl2 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/cm^2.
出处
《应用化学》
CAS
CSCD
北大核心
2010年第12期1403-1408,共6页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金(20874098和50772113)资助项目
作者简介
通讯联系人:程延祥,男,研究员;E-mail:yanxiang@ciac.jl.cn;研究方向:高分子及金属有机化学