| Metal-organic frameworks?MOFs?,also known as coordination polymers,is a new type of crystalline materials,which are assembled by metal ions and organic ligands through coordination bonds.Due to the tunable structure and size,MOFs materials are widely used in gas separation and storage,catalysis,electrochemistry,fluorescence sensing,drug delivery and release.In this paper,four kinds of novel MOFs materials were constructed by solvothermal method using Zn?NO3?2·6H2O as metal source and aromatic carboxylic acids/nitrogen-containing ligand as bridging ligands,and their structures and properties were studied.The specific works are as follows:1.A novel Zn-based coordination polymer[Zn?oba?2?bpy?2]?1?has been synthesized under solvothermal condition with 4,4'-oxybisbenzoic acid and 4,4'-bipyridine as ligands,and its structure was characterized by single-crystal X-ray diffraction.Powder X-ray diffraction research revealed that it has good thermal and hydrolytic stability.The fluorescence investigation demonstrated that 1 has good recognition properties for Fe3+cation and Cr2O72-/CrO42-anions in aqueous solution.Even in the presence of other ions,it also manifests a high degree of sensitivity and selectivity.2.In view of the strong fluorescence properties and good chemical stability of 1,we applied it to the detection of sulfonamide antibiotics and nitroaromatic compounds?NACs?in aqueous solution.1 can effectively detect a series of sulfonamide antibiotics and NACs in aqueous solution.The detection limits were 1.016×10-6 M and 2.82×10-77 M for sulfametahazine?SMZ?and trinitrophenol?TNP?.Moreover,the proposed method was successfully applied for the determination of SMZ and TNP in human urine and real water,respectively,and the satisfactory recoveries were 97.37-100.15%for SMZ and97.26-99.51%for TNP.3.A Zn-based coordination polymer[Zn3?bpdc?6(bpy2)]?2?has been synthesized under solvothermal condition with 4,4'-biphenyldicarboxylic acid and 4,4'-bipyridine as ligands,and its structure was characterized by single-crystal X-ray diffraction.The fluorescence sensing investigation indicated that 2 can detect heavy metal ions Fe3+and Cu2+in aqueous phase with high selectivity.In addition,2 can also highly selectively detect p-nitrophenol?4-NP?,trinitrophenol?TNP?and nitrazole antibiotics?metronidazole:MDZ,ornidazole:ODZ?.4.A Zn-based coordination polymer[Zn2?btc?6]?3?has been synthesized under solvothermal condition with 1,3,5-benzenetricarboxylic acid as ligand.The Zn-based coordination polymer[Zn2?ipa?4?bpy?4]?4?has been synthesized under solvothermal condition with isophthalic acid and 4,4'-bipyridine as ligands.The structures of 3 and 4 have been characterized by single crystal X-ray diffraction.Thermogravimetric analysis reveals that 3 and 4 have strong thermal stability. |
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