由联苯二甲酸构筑的钐(III)配合物的合成、结构和性质.rar

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  • 更新时间:2016-04-22
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摘要:配体2,2'-联苯二甲酸和Sm2O3在水热条件下反应合成了配合物[Sm(bda)1。5(H2O)] (1) (H2bda: 2,2'-联苯二甲酸],用单晶X-射线和元素分析对生成的晶体进行了表征,结构研究发现该晶体属于单斜晶系C2/c空间群的一维链结构。Sm1(III)采取八配位的反四棱柱几何构型,而Sm2(III)采取八配位的四棱柱几何构型,羧基分别采用 μ2-η2 : η1和μ2-η1 : η1两种配位模式, bda2- 阴离子作为μ3-桥连结Sm(III)离子形成1D链结构,进一步的,通过π-π和C-H ···π堆积作用形成2D和3D结构。同时研究了该配合物的荧光和热稳定性。

关键词:Sm(III)配合物;稀土;热稳定性;荧光性质

 

Abstract:A new complex, [Sm(bda)1。5(H2O)] (H2bda: 2,2’-Biphenyldicarboxylic Acid), is a metal-carboxylate coordination polymer prepared by hydrothermal synthesis techniques and monoclinic space group C2/c and has 1D chain-like architecture. The crystal structure reveals that characterized by single crystal X-ray diffraction and elemental analysis. Complex 1 crystallizes in Sm(III)centers adopt distorted square anti-prism and square prism geometries. Carboxylate groups take μ2-η1 : η1 and μ2-η1 : η1 two coordination models, respectively. The bda2- acts as a μ3-bridge connecting Sm(III) centers to result in a one dimensional chain structure, Further, 1D chains of 1 are connected together to form 2D and 3D structure through π-π and C-H···π interactions. The luminescent property and thermal stability of complex 1 were studied.

Key words: Sm(III) complex; rare earth; thermal stability; luminescent property.

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