Construction of a Eu-MOF Material with Fe3+ and Nitro-aromatic Explosives Fluorescence Detection Performance
Massive release of metal cations and nitro-aromatic explosives causes a serious threat to the environment and human health,and their efficient detection is of great research significance and challenge.Metal-organic frameworks(MOFs)are considered as a promising fluorescence sensing detection platform.A Eu-MOF material,[(CH3)2NH2]2[Eu6(μ3-OH)8(EDDC)6]·8DMA·3MeOH·6H2O[JLU-MOF128,H2EDDC=(E)-4,4′-(ethene-1,2-diyl)-dibenzoic acid],with fcu topology,was synthesized under solvothermal conditions.The structure and composi-tion of JLU-MOF128 were characterized by single crystal X-ray diffraction,powder X-ray diffraction,X-ray photoelectron spectroscopy,infrared spectroscopy,elemental analysis and thermogravimetric analysis.Owing to the introduction of the fluorescent H2EDDC ligand,JLU-MOF128 exhibits significant fluorescence properties.The metal cations and nitro-aromatic compounds detection results indicate that JLU-MOF128 is an ideal multi-induction fluorescence sensor with good fluorescence detection performance for Fe3+,2,4,6-trinitrophenol(TNP),and 2,4-dinitrophenol(2,4-DNP)in N,N-dimethylformamide(DMF),with Ksv values of 2.09×104,8.49×104 and 5.75×104 L/mol,and detection limits of 5.99,1.51 and 1.93 μmol/L,respectively.
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