一种具有荧光性质的三维Zn(Ⅱ)金属-有机框架

A Three-Dimensional Zn(Ⅱ)Metal-Organic Framework with Fluorescent Properties

以1,3,5-苯三甲酸(H_(3)BTC)为配体,与Zn(Ⅱ)离子在溶剂热条件下反应制备了配合物{[Zn(BTC)2/3]·[HCON(CH_(3))_(2)]·[C_(2)H_(5) OH]}n(1)。通过单晶X射线衍射分析(SXRD)、红外光谱(FT-IR)、热重分析(TGA)、粉末X射线衍射分析(PXRD)和荧光光谱对配合物1进行表征。单晶X射线衍射分析表明,配合物1属于单斜晶系P21/n空间群。在配合物1中Zn(Ⅱ)离子通过羧基上的氧原子与BTC 3-离子配位,形成了具有孔道的三维Zn(Ⅱ)金属有机框架(MOF)结构。并且通过分子间氢键相互作用,将乙醇和N,N’-二甲基甲酰胺(DMF)分子封装进平行四边形的孔道中。室温下的荧光光谱分析表明,当激发波长为297 nm时,配合物1在601 nm处具有最强的发射峰。

The complex{[Zn(BTC)_(2/3)]·[HCON(CH_(3))_(2)]·[C_(2)H_(5) OH]}n(1)was prepared from 1,3,5-benzenetricarboxylic acid(H_(3)BTC)and Zn(Ⅱ)cation via a solvothermal technique.The complex 1 was characterized by single crystal X-ray diffraction(SXRD),Fourier transform-infrared spectroscopy(FT-IR),thermogravimetric analysis(TGA),powder X-ray diffraction(PXRD)and fluorescence spectroscopy.Single crystal X-ray diffraction analysis indicates that complex 1 belongs to space group P21/n of the monoclinic system.In complex 1,the Zn(Ⅱ)ion is coordinated with BTC 3-anion through the oxygen atom on the carboxyl group,forming a three-dimensional Zn(Ⅱ)metal-organic framework(MOF)structure with channels.And through intermolecular hydrogen bond interaction,ethanol and N,N′-dimethylformamide(DMF)molecules are encapsulated into parallelogram channels.Fluorescence spectrum analysis at room temperature shows that when the excitation wavelength is 297 nm,complex 1 has the strongest emission peak at 601 nm.