一种用于检测四环素和对硝基苯酚的高稳定性镉（Ⅱ）金属有机骨架

采用水-溶剂热法合成了1例金属有机骨架（MOF）：{[Cd （L）_0.5（4，4''-bpy）_0.5]·H₂O}_n（1），其中H₄L=（1，1''∶4''，1″-三联苯）-2，2″，4，4″-四羧酸，4，4''-bpy=4，4''-联吡啶）。通过单晶X射线衍射、元素分析、粉末X射线衍射、热重分析以及红外光谱分析对配合物1的结构进行了表征。单晶结构分析表明1为三维结构，属于单斜晶系，C2/c空间群，Cd （Ⅱ）连接L^4-和4，4''-bpy形成二维平面结构，层与层之间通过L^4-连接，构筑成了三维网状结构。该MOF表现出良好的稳定性并且可以通过荧光猝灭法检测四环素（TET）和对硝基苯酚（4-NP），四环素和对硝基苯酚的检出限分别为0.15和0.062 μmol·L^-1。此外，还研究了其荧光猝灭机理。1可成功应用于延河水样中TET和4-NP含量的测定。

A highly stable cadmium(Ⅱ) metal-organic framework for detecting tetracycline and p-nitrophenol

A new metal-organic framework (MOF) {[Cd(L)_0.5(4,4''-bpy)_0.5]·H₂O}_n (1), where H₄L=(1,1'':4'',1″-terphenyl)-2,2″,4,4″-tetracarboxylic acid, 4,4''-bpy=4,4''-bipyridine, was synthesized by hydro-solvothermal method. The structure of complex 1 was characterized by single-crystal X-ray diffraction, elemental analysis, powder X-ray diffraction, thermogravimetric analysis, and infrared spectrum analysis. The analysis of single crystal structure shows that 1 is a 3D structure, belonging to the monoclinic crystal system, C2/c space group. Cd(Ⅱ) connects L^4- and 4,4''-bpy to form a 2D plane structure, and the layers are connected by L^4- to form a 3D network structure. The MOF shows good stability and can be used for the detection of tetracycline (TET) and p-nitrophenol (4-NP) by fluorescence quenching. The detection limits of TET and 4-NP were 0.15 and 0.062 μmol·L^-1, respectively. In addition, the fluorescence quenching mechanism of 1 was also studied. 1 can be successfully applied to the determination of TET and 4-NP content in Yanhe water samples.