摘 要:本论文以简单的钼酸盐、过渡金属和有机配体为原料,在酸性条件下,通过水热方法合成出一种结构新颖的基于多金属氧酸盐的配位聚合物:[Cu2(4,4’-bpy)2][HPMo12O40]•(C5H6N2)(1)(4,4’-bpy = 4,4’-联吡啶,C5H6N2 = 2-氨基吡啶)。X-射线单晶结构分析表明,化合物1由一个pseudo-Keggin型多酸阴离子[HPMo12O40]2-、一个游离的2-氨基吡啶分子和一个过渡金属配合物[Cu(4,4’-bpy)]22+ TMC组成。有趣的是化合物1通过铜离子、有机配体和金属-氧簇阴离子连接成1-D链状结构。 研究了反应体系的pH值、过渡金属和有机配体等因素对反应产物的影响。利用X-射线单晶衍射推测化合物结构,然后对化合物进行了红外、元素分析、X-射线光电子能谱、热重、紫外以及X-射线粉末衍射等多种表征,还研究了化合物的电化学性能,为更加深入探索多酸的性能与结构的联系奠定基础。35385 毕业论文关键词:多金属氧酸盐;配位聚合物;水热合成;晶体结构
Syntheses and Structures Characterizations of Coordination
Polymers Based on Polyoxmetalates
Abstract:In this thesis, we use simple tungstates, select transition metal and organic ligands to build one coordination polymers based on polyoxmetalates with novel structures by hydrothermal synthesis method. The molecular formula is [Cu2(4,4’-bpy)2][HPMo12O40]•(C5H6N2)(1). Single crystal X-ray diffraction analysis reveals that the asymmetric unit of compound 1 is consists of a pseudo-Keggin anion [HPMo12O40]2-,a dissociated 2-aminopyridine moiety and a transition metal complexe [Cu(4,4’-bpy)]22+ TMC. It is novel that the 1-D chain structure is constructed from copper ions, 4,4′-bpy ligands and polyoxometalates (POMs) connected together.
The reaction system pH value,transition metals and organic ligands on the influence of the products were studied. The compound has been characterized by IR, elemental analysis, XPS, X-ray structural analyses, TG, UV-Vis and XRD. The electrochemistry property of the compound have been studied,which provide theoretical basis in the explorations of structures and functions for the compounds.
Key Words: Polyoxmetalates; Coordination Polymers; Hydrothermal Synthesis; Crystal structure
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