A new cluster-based metal-organic framework with triazine backbones for selective luminescent detection of mercury(II) ion

A new duster-based metal-organic framework (MOF)[(Me2NH2)Cd-3(OH)(H2O)(3)(TATAB)(2)](DMA)(6) (1, DMA = N,N-dimethylacetamide) with triazine backbones has been successfully prepared using the 4,4',4 ''-s-triazin-1,3,5-triyltri-p-aminobenzoic add (H(3)TATAB) as the organic spaces. The as-prepared 1 was characterized by elemental analysis, powder X-ray diffraction, single-crystal X-ray diffraction and thermogravimetric analysis. The X-ray study result reveals that complex 1 belongs to the tetragonal space group P4(3)2(1)2 and shows a three-dimensional channel-type framework. The luminescent responses of 1 respect to different metal ions were studied, which reveals that 1 shows highly selective and sensitive detection of Hg2+ via an obvious fluorescence quenching and red-shift of the emission peak. Furthermore, the possible sensing mechanism has also been discussed in this work. (C) 2018 Elsevier B.V. All rights reserved.