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首页> 外文期刊>Crystal growth & design >Temperature-dependent structures of lanthanide metal-organic frameworks based on furan-2,5-dicarboxylate and oxalate
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Temperature-dependent structures of lanthanide metal-organic frameworks based on furan-2,5-dicarboxylate and oxalate

机译:基于呋喃-2,5-二羧酸盐和草酸盐的镧系金属-有机骨架的温度依赖性结构

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摘要

Two series of lanthanide metal-organic frameworks, [Ln(FDA)(OX) _(0.5)(H _2O) _2]?(H _2O) (1Ln) (Ln = Pr 1, Nd 2, Eu 3, Gd 4, Tb 5), [Ln(FDA)(OX) _(0.5)(H _2O) _2]?(H _2O) (2Ln) (Ln = Sm 6, Tb 7, Dy 8, Ho 9, Yb 10) (OX = oxalate), have been prepared by reacting Ln(NO _3) _3?6H _2O with furan-2,5-dicarboxylic acid (H _2FDA) at different temperatures under hydrothermal conditions. All the complexes are characterized by elemental analysis, IR, X-ray powder diffraction, and single-crystal X-ray diffraction. Structure analyses show that 1Ln and 2Ln are supramolecular isomerisms. 1Ln possesses a three-dimensional network with monoclinic space group P2 _1/c, whereas 2Ln exhibits a three-dimensional framework with monoclinic space group C2/c. The distinct architectures of these two series of ten complexes indicated that the reaction temperature plays an important role in the formation of such coordination structures. Meanwhile, the photoluminescent properties of 4, 5, 7, and 8 are also investigated in the solid state at room temperature.
机译:两个系列的镧系金属有机骨架,[Ln(FDA)(OX)_(0.5)(H _2O)_2]?(H _2O)(1Ln)(Ln = Pr 1,Nd 2,Eu 3,Gd 4, Tb 5),[Ln(FDA)(OX)_(0.5)(H _2O)_2]?(H _2O)(2Ln)(Ln = Sm 6,Tb 7,Dy 8,Ho 9,Yb 10)(OX =草酸盐),是通过在水热条件下,在不同温度下使Ln(NO _3)_3→6H _2O与呋喃-2,5-二羧酸(H _2FDA)反应制得的。所有配合物均通过元素分析,IR,X射线粉末衍射和单晶X射线衍射进行表征。结构分析表明1Ln和2Ln是超分子异构体。 1Ln具有单斜空间组P2 _1 / c的三维网络,而2Ln则具有单斜空间组C2 / c的三维框架。这两个系列的十个配合物的独特结构表明,反应温度在这种配位结构的形成中起着重要作用。同时,还在室温下在固态下研究了4、5、7和8的光致发光性质。

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