一种具有荧光性质的三维Zn(Ⅱ)金属-有机框架

摘要/Abstract

摘要： 以1,3,5-苯三甲酸(H₃BTC)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(CH₃)₂]·[C₂H₅OH]}_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。

关键词: Zn(Ⅱ)配合物, 溶剂热合成, 1,3,5-苯三甲酸, 金属有机框架, 晶体结构, 荧光性质

Abstract: The complex {[Zn(BTC)_2/3]·[HCON(CH₃)₂]·[C₂H₅OH]}_n(1) was prepared from 1,3,5-benzenetricarboxylic acid (H₃ 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.

Key words: Zn(Ⅱ) complex, solvothermal synthesis, 1,3,5-benzenetricarboxylic acid, metal-organic framework, crystal structure, fluorescent property

中图分类号:

O734

朱百丽, 贺鹏珍, 王清华, 崔术新. 一种具有荧光性质的三维Zn(Ⅱ)金属-有机框架[J]. 人工晶体学报, 2021, 50(8): 1471-1477.

ZHU Baili, HE Pengzhen, WANG Qinghua, CUI Shuxin. A Three-Dimensional Zn(Ⅱ) Metal-Organic Framework with Fluorescent Properties[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(8): 1471-1477.

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