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"-terphe-nyl)-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 dif-fraction,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 L4-and 4,4'-bpy to form a 2D plane structure,and the layers are connected by L4-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 fluores-cence 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.CCDC:2264479.
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