基于杂环羧酸配体的金属有机骨架化合物合成、表征及性质研究

以噻吩-2,5-二羧酸为主要配体,借助第二配体----4,4-联吡啶或者邻菲罗啉通过水热法合成了三种MOFs材料,分别是Cd (tdc) (bpy)]n、Zn (tdc) (bpy)]n、Co (tdc) (phen)]n。利用X射线单晶衍射仪、红外光谱仪对三种MOFs材料进行了结构表征与分析,同时利用荧光光谱仪、热重分析仪和电化学工作站测定了三种MOFs材料的荧光性质、热稳定性和MOFs材料修饰玻碳电极的电化学行为,结果表明,三种MOFs材料比配体更好的荧光强度和热稳定性,制备的Co (tdc) (phen)]n修饰玻碳电极,对铁氰化钾溶液和含1.0mmol/L NaNO2的pH = 5 PBS溶液,均比裸玻碳电极表现出更强的循环伏安响应,有望作为修饰剂应用于修饰玻碳电极中。

Syntheses, Characterizations and Properties of Metal-organic Frameworks Based on Heterocyclic Carboxylate Ligands

Three kinds of MOFs, namely Cd (tdc) (bpy)]n, Zn (tdc) (bpy)]n nd Co (tdc) (phen)]n, were synthesized by hydrothermal method with thiophene-2,5-dicarboxylic acid as the main ligand and the second ligand----4,4-dipyridyl or phenanthroline. Their structures were characterized and analyzed by X-ray single crystal diffractometer and infrared spectrometer. At the same time, the fluorescence properties and thermal stabilities of three MOFs and electrochemical behavior of MOFs material-modified glassy carbon electrode were measured by fluorescence spectrometer, thermogravimetric analyzer and electrochemical workstation. The results indicated that three kinds of MOFs have better fluorescence intensity and thermal stability than ligands. The prepared Co (tdc) (phen)]n modified glassy carbon electrode showed stronger cyclic voltammetry response than the bare glassy carbon electrode for potassium cyanide solution and pH = 5 PBS solution containing 1.0mmol/L NaNO2. It is expected to be used as a modifier in modified glassy carbon electrodes.