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)(2)NH2](2)[Eu-6 (mu(3)-OH)(8)(EDDC)(6)]center dot 8DMA center dot 3MeOH center dot 6H(2)O [JLU-MOF128, H2EDDC=(E)-4,4'-(ethene-1,2-diyl)-dibenzoic acid], with fcu topology,was synthesized under solvothermal conditions. The structure and composition 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 K-sv values of 2.09x10(4), 8.49x10(4) and 5.75x10(4) L/mol,and detection limits of 5.99, 1.51 and 1.93 mu mol/L, respectively.