| Metal-organic frameworks?MOFs?is a kind of porous materials with disciplinary network structure which are made by linking inorganic metal cluster and organic ligand.MOFs,a kind of crystalline materials,which can be accurate obtained internal molecular structure by single crystal X-ray diffraction analysis,so analyzing the connection between the structure and material properties become easy and direct.The flexibility with which the constituents' geometry,size,and functionality can be varied has led to infinite possibilities in MOFs structure.MOFs with permanent porosity are more extensive in their variety and multiplicity than any other class of porous materials.These aspects have made MOFs in wide range of potential uses including gas storage,separations,catalysis,fluorescent material,chemical sensing and drug delivery.In this paper,6 novel MOFs have been constructed by adjusting and controlling of structure.Furthermore,we characterized their structures and explored the properties of gas storage,separations,catalysis and fluorescence.The main contents are as follows:?1?Based on the thiophene-2,5-dicarboxylic acid?H2tdc?and 4,4'-?1H-1,2,4-triazole-3,5-diyl?bis-Pyridine?Hdpt?,three novel 3D MOF [Cu?Hdpt??tdc??H2O?]n?PF-1?,{[Cu2?dpt?2?tdc?2]·2DMF}n?PF-2?and [Cu2?dpt??tdc?]n?PF-3?have been synthesized and characterized.Through precisely modulating the reaction conditions,the MOFs could be obtained with high crystal purity,and the fabricating regularity of the MOFs was investigated at the same time.Crystal transformation from PF-1 to PF-3 and the middle state has been founded in the process,the causes of crystal transformation was speculated through the analysis of frame structure.Furthermore,the gas storage and separation properties of the obtained MOFs were also characterized detaily.?2?Two novel 3D MOFs,[Cu2?ATPTB?·?H2O?2]?PF-4?and [In?ATPTB?]n?PF-6?,have been synthesized via hydrothermal method using 2?-amido-[1,1?:4?,1?-terphenyl]-3,3?,5,5?-tetracarboxylic acid?H4ATPTB?as ligand.The gas adsorption performance of the obtained MOFs was tested,and the adsorption volum of NH2-modified PF-4 was improved obviously compared with that of NOTT-101.In addition,PF-4 also showed excellent catalytic performance in 4-nitrophenol reduction process.Its catalytic efficiency is about five times higher than that of traditional CuO catalyst,and is close to that of homogeneous Cu?OAc?2 catalysts.?3?Based on the 2?5?-dimethyl-[1,1?:4?,1?-terphenyl]-3,3?,5,5?-tetracarboxylic acid,a novel 3D NbO topos structure [Zn2?DMTPTB?·?H2O?2]n?PF-5?has been synthesized and characterized.The characterization results reveal that the PF-5 show different fluorescence response for different solutions,which can be used as a kind of probe to identify different solutions. |
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