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Assembly of a secondary building unit (SBU) into two- and three-dimensional structures in lanthanide benzenedicarboxylates

机译:将二级建筑单元(SBU)组装成镧系元素苯二羧酸盐的二维和三维结构

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Two series of lanthanide benzenedicarboxylates of the general framework formula [M-2(2,2'-biPY)(2)(C8H4O4)(3)] (M = Y, Gd, and Dy) have been prepared employing hydrothermal methods, and their structures were determined by single-crystal X-ray diffraction. Both the structure types contain only one type of secondary building units (SBU), which are connected differently giving rise to two- and three-dimensional (2- or 3-D) structures. While the 2-D structure is related to an augmented square lattice, the 3-D one closely resembles the CdSO4 structure. This is the first observation. to our knowledge. of a CdSO4 Structure in the coordination polymers containing the rare earth ions. The formation of these structures has been rationalized from the connectivity between the building units, which clearly indicates that the framework structures are related. All the compounds have been characterized by powder X-ray diffraction, elemental analysis, infrared (IR) spectroscopic, thermogravimetric analysis (TGA), and photoluminescence studies.
机译:使用水热法制备了两个骨架结构通式为[M-2(2,2'-biPY)(2)(C8H4O4)(3)]的镧系元素苯二羧酸盐,(M = Y,Gd和Dy),并且它们的结构是通过单晶X射线衍射确定的。两种结构类型仅包含一种类型的二级建筑单元(SBU),它们的连接方式不同,从而产生了二维和三维(2-D或3-D)结构。虽然2-D结构与增幅方格有关,但3-D结构与CdSO4结构非常相似。这是第一次观察。据我们所知。 CdSO4结构在含稀土离子的配位聚合物中的分布这些结构的形成已通过建筑单元之间的连通性进行了合理化,这清楚表明框架结构是相关的。所有化合物均通过粉末X射线衍射,元素分析,红外(IR)光谱,热重分析(TGA)和光致发光研究进行了表征。

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