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DyCl3.6H2O与二甘醇酸(H2dga)在水热条件下反应得到配位聚合物{[Dy2(dga)3(H2O)4].2H2O}n,用X-射线衍射单晶结构分析方法确定了其晶体结构。该配合物的晶体属于正交晶系,C2221空间群。在配合物中,Dy3+离子存在两种类型的配位环境。九配位的Dy1离子与3个二甘醇酸根的6个羧基氧原子和3个醚氧原子配位,其配位多面体可描述为一个扭曲的单帽四方反棱柱;八配位的Dy2离子周围的8个配位氧原子形成一个扭曲的四方反棱柱配位多面体,其中4个氧原子来自4个二甘醇酸根,另外4个氧原子由4个配位水分子提供。二甘醇酸配体的2个羧基和其醚氧原子同时与Dy3+离子配位而形成2D网状结构。该配合物在室温下的固体荧光光谱显示了中心Dy3+离子的特征荧光,位于483 nm和574 nm的发射峰分别对应于Dy3+离子的4F9/2→6H15/2和4F9/2→6H13/2跃迁。
DyCl3.6H2O and diglycolic acid (H2dga) were reacted under hydrothermal conditions to obtain the coordination polymer {[Dy2 (dga) 3 (H2O) 4] .2H2O} n and its structure was determined by X-ray diffraction Its crystal structure. The crystal of this complex belongs to orthorhombic system, C2221 space group. In the complex, there are two types of coordination environment for Dy3 + ions. The nine-coordinated Dy1 ions coordinate with six carboxy oxygen atoms and three ether oxygen atoms of three diglycollates. The coordination polyhedron can be described as a twisted single cap tetragonal antiprism. The eight-coordinated Dy2 ions The surrounding 8 coordination oxygen atoms form a twisted tetragonal anti-prism coordination polyhedron in which 4 oxygen atoms are derived from 4 diglycolates and the other 4 oxygen atoms are provided by 4 coordinating water molecules. The two carboxyl groups of the diglycolic acid ligand and their ether oxygen atoms coordinate with Dy3 + ions to form a 2D network structure. The fluorescence spectrum of the complex at room temperature shows the characteristic fluorescence of Dy3 + ions in the center. The emission peaks at 483 nm and 574 nm correspond to 4F9 / 2 → 6H15 / 2 and 4F9 / 2 → 6H13 / 2 transitions of Dy3 + ions, respectively .