Three-dimensional cage zinc triazine framework compound: Fluorescence sensing of aromatic compounds containing NO2/OH groups

A new compound {[Zn-7(DPOT)(2)(H2O)(11)]center dot 2OH center dot 3H(2)O center dot 5DMA} (1) was synthesized by the reaction of the H6DPOT ligand (H6DPOT= 5,5 ',5 ''-((1, 3, 5-triazine-2,4,6-triyl)tris(oxy)) tri-isophthalic acid, DMA= N,N-dimethylacetamide) and Zn(NO3)(2)center dot 6H(2)O using a solvothermal method. It was characterized by elemental analysis, infrared spectroscopy, ultraviolet spectroscopy, thermogravimetric analysis and X-ray powder diffraction. The crystal structure of 1 was determined by X-ray crystallography diffraction. The three-dimensional cage structure is formed by [Zn-2(COO)(4)(H2O)(2)] and [Zn-2(COO)(3)(H2O)(4)] building blocks. By exploring fluorescence sensing on nitro aromatic compounds (NACs) and hydroquinone (HQ), the results show that 1 has a smart fluorescence sensing ability for NACs and HQ. For HQ, the K-sv was 2.9 x 10(4) M-1, and the limit of detection (LOD) value was 9.5 mu M. For 2,4,6-trinitrophenol (TNP), the K-sv was 2.4 x 10(5) M-1, and the LOD value was 1.12 mu M.