论文部分内容阅读
采用水热法通过Ln2O3、Zn(CH3COO)2·2H2O与2,5-吡啶二羧酸为配体的反应合成出两个新型三维杂金属配位聚合物[Ln2Zn2(2,5-pydc)5(H2O)2]·4H2O(Ln=Sm(1),Eu(2);2,5-pydc:2,5-吡啶二羧酸).通过元素分析、红外光谱、X射线粉末衍射方法以及X射线单晶衍射方法对配合物进行了表征.结构分析表明,配合物1和2的结构是相同的,其晶体均为单斜晶系,空间群为P21/c.配合物1和2中2,5-吡啶二羧酸配体共有两种配位方式.通过配位模式I连接Ln和Zn形成二维层状结构;而层与层之间通过配位模式II进一步连接起来形成三维复杂网状结构.此外,还对配合物的荧光性质和热分解过程进行了详细分析.荧光分析表明,金属Zn的引入有效增强了配合物中稀土金属的发光.
Two novel three-dimensional heteroleptic metal complexes [Ln2Zn2 (2,5-pydc) 5] have been synthesized by the hydrothermal method using Ln2O3, Zn (CH3COO) 2 · 2H2O and 2,5-pyridinedicarboxylic acid as ligands (H2O) 2] · 4H2O (Ln = Sm (1), Eu (2); 2,5-pydc: 2,5-pyridinedicarboxylic acid) by elemental analysis, IR, X-ray powder diffraction and X The complex was characterized by X-ray single crystal diffraction. The structural analysis showed that the structures of complexes 1 and 2 were the same. The crystals were monoclinic and the space group was P21 / There are two kinds of ligands for 5-pyridinedicarboxylic acid ligands, Ln and Zn are connected to form two-dimensional layered structure through coordination mode I, and three-dimensional complex network is further connected through coordination mode II between layers In addition, the fluorescence properties and thermal decomposition process of the complex were also analyzed in detail.Fluorescence analysis showed that the introduction of metal Zn effectively enhanced the luminescence of the rare earth metal in the complex.