二维钨-钒簇聚物Cu（en）22·WⅥ4·5WV2VVVⅣ9·5O44{Cu（en）2（H2O）}2·3H2O的合成与表征

摘要

采用水热法合成了一个钨­钒簇聚物[Cu(en)2]2[WⅥ4.5WV2 VVVⅣ9.5O44{Cu(en)2(H2O)}2]·3H2O(1, en=乙二胺),并通过X射线单晶衍射、元素分析、傅里叶变换红外光谱、X射线粉末衍射、热重分析、价键计算、X射线光电子能谱、电子顺磁共振和磁性分析对其结构和性能进行了表征.结果表明,化合物1是以双支撑的四帽Keggin结构[WⅥ4.5WV2 VⅣ9.5O40(VVO4){Cu(en)2(H2O)}2]4-钨­钒簇合物阴离子为基本结构单元,与4个[ Cu( en)2]2+配合物阳离子以共价键和弱键相连接形成二维层状结构,相邻层又通过氢键连接成三维超分子网络.研究了化合物1的磁性及光催化降解罗丹明B的活性.%A new compound, [Cu(en)2]2[WⅥ4.5WV2 VVVⅣ9.5O44{Cu(en)2(H2O)}2]·3H2O(1, en=ethy­ lenediamine) , was hydrothermally synthesized and characterized by elemental analysis, Fourier transform infrared spectroscopy ( FTIR ) , X­ray photoelectron spectroscopy ( XPS ) , electron paramagnetic resonance (ESR), X­ray diffraction analysis(XRD), thermogravimetric(TG) analysis and single­crystal X­ray diffrac­ tion analysis. Compound 1 represents a 2D layer structure constructed from tetra­capped bi­supporting Keggin tungstovanadates and transition metal complexes. Adjacent layers are further interconnected into a 3D supra­ molecular structure via hydrogen bonds. The magnetic susceptibility of compound 1 demonstrates the presence of ferromagnetic interactions. In addition, the photocatalytic activity of compound 1 for the phtodegradation of Rhodamine B( RhB) was also investigated.