| MOFs(Metal-Organic Frameworks)are porous materials assembled by organic ligands and metal ions or metal clusters through coordination bonds.Due to their special electronic and optical properties,permanent porosity,high surface area,and easily controlled structure and function,MOFs are considered as a favorable platform for sensing/detection.Low cost,easy to operate,fast response,good selectivity and high sensitivity are the advantages of MOFs based fluorescent detection method.We elaborately selected two acylamide-functionalized dicarboxylate ligands and synthesized a series of MOFs with transition metal ions,and explore the application of MOFs in fluorescence detection.The main work is listed as follows:1.Seven MOFs were designed and synthesized,Zn(II)and Cd(II)as metal nodes to react with 4,4?-((naphthalene-1,4-dicarbonyl)bis(azanediyl))dibenzoic acid(NDBDA)and different nitrogen-containing auxiliary ligands under solvothermal conditions,{[Zn2(NDBDA)(OH)4]·2H2O}n(1),{[Zn(NDBDA)(bpea)]·3H2O}n(2),{[Zn(NDBDA)(bpe)0.5]·DMF}n(3),{[Zn(NDBDA)(2,2?-bipy)]·DMF·2H2O}n(4),{[Cd2(NDBDA)2(DMA)2(H2O)2]·DMA·2H2O}n(5),{[Cd2(NDBDA)2(bpp)(OH)2]·DMA}n(6)and{[Cd2(NDBDA)2(2,2?-bipy)(H2O)2]·DMA·2H2O}n(7).The structure analysis shows that complex 1 shows two-dimensional layer.Complexes 2,4,6 display three-dimensional supramolecule structure.Complex 3 features three-dimensional framework.Complex 5 and complex 7 show one-dimensional chains,but it is interesting that complex 5 shows only one-dimensional double chains,while complex 7 shows one-dimensional double chains and one-dimensional single chains.In addition,the luminescent properties of complexes 1-7 are investigated.The results of TGA and PXRD show that complex 3 has good thermal stability and water stability,and it can be used in water for fluorescence detection.The results show that complex 3 can be used as a multi-responsive fluorescent sensor for the sensitive,selective and reversible detection of TNP,NZF and Cr2O72-in water.2.Seven MOFs were designed and synthesized,Zn(II)and Cd(II)as metal nodes to react with 4,4?-((naphthalene-1,4-dicarbonyl)bis(azanediyl))bis(2-methyldibenzoic acid)(NDBBMA)and different nitrogen-containing auxiliary ligand under solvothermal conditions,{[Zn(NDBBMA)(bpea)]·DMF·3H2O}n(8),{[Zn(NDBBMA)(bpe)]·DMF·3H2O}n(9),[Zn(NDBBMA)(4,4?-bipy)0.5]n(10),{[Cd(NDBBMA)(OH)2]·DMF}n(11),[Cd3(NDBBMA)4(bpea)0.5(H2O)3]n(12),[Cd3(NDBBMA)4(bpe)0.5(H2O)3]n(13)and{[Cd(NDBBMA)(bpp)]·DMF·2H2O}n(14).Complex 11 shows one-dimensional double chains.Complex 10 displays three-dimensional framework.Complexes 8 and 9 are isostructural,and they feature three-dimensional frameworks.Interestingly,metal ions Zn(II)can form a diamond net through the connection of organic ligand and nitrogen-containing auxiliary ligand.Complexes 12 and 13 are isostructural,and they feature three-dimensional frameworks.Complex 14 shows two-dimensional layer.In addition,the luminescent properties of complex 8-14 are investigated.The results showed that complex 14 had good fluorescence detection of FZD,Fe3+and Cr2O72-in water. |
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