Bipolar-transporting dinuclear europium(III) complexes involving carbazole and oxadiazole units: Synthesis, photophysical and electroluminescent properties
作者:Yu Liu、Jianyu Wang、Yafei Wang、Zhiyong Zhang、Meixiang Zhu、Gangtie Lei、Weiguo Zhu
DOI:10.1016/j.dyepig.2012.05.015
日期:2012.11
A class of bipolar-transporting dinuclear europium (III) complexes involving a carbazole and a oxadizaole fragments was synthesized and characterized by elemental analysis, infrared spectro-scopy and thermal analyses. Compared to the mononuclear europium (III) tris(dibenzoylmethane) (1,10-phenanthroline), these dinuclear europium (III) complexes presented better thermal stability, and similar UV-vis
合成了一类涉及咔唑和恶二唑片段的双极传输双核euro(III)配合物,并通过元素分析,红外光谱和热分析对其进行了表征。与单核tri(三苯甲酰甲烷)(1,10-菲咯啉)相比,这些双核euro(III)配合物具有更好的热稳定性,在二氯甲烷中具有相似的紫外可见吸收和光致发光光谱。在光激发下,从中心Eu 3+离子的5 D 0 → 7 F 2跃迁观察到两个强烈的紫外可见吸收带,分别在282 nm和352 nm处,并在614 nm处出现了典型的红色发射峰,分别。使用Eu 2(DBM)6(FPhOXD6CzPhen 2)作为发射体,以及聚(乙烯基咔唑)和2-(4-联苯基)-5-(4-叔丁基苯基)-1,3,4-恶二唑的混合物,作为主体基质,单发射层聚合物发光器件在1 wt%至8 wt%的掺杂剂浓度下表现出Eu 3+离子发出的饱和红色电致发光。