Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.
Dalton Trans. 2019 Dec 28;48(48):17800-17809. doi: 10.1039/c9dt03714d. Epub 2019 Nov 26.
Hg is highly toxic and hazardous and widely found in polluted water. To remove mercury ions from wastewater, there is an urgent need to investigate and develop new adsorbents. Herein, we synthesized three novel thioether-based metal-organic frameworks (MOFs) through a facile diffusion method or a solvothermal strategy, i.e. [(ZnCl)(L)·χ(solvent)] (1), [(CuIO)(CHN)(L)(DMA)·3(HO)·χ(solvent)] (2) and [(CuBr)(L) CHCN·χ(solvent)] (3), where L = 1,3,5-tris((pyridin-4-ylthio)methyl)benzene and L = 2,4,6-trimethoxy-1,3,5-tris((pyridin-4-ylthio)methyl)benzene. The obtained thioether-based MOFs were characterized by single-crystal X-ray diffraction, Fourier transform infrared spectroscopy, elemental analysis and thermogravimetric analysis. Further studies revealed that they could remove Hg from water. They have high adsorptivity (up to 362 mg g) and are highly efficient in removing Hg (up to 95%). Besides, these MOFs can be recycled and can selectively remove Hg from water in the presence of other metal ions. Consequently, these MOFs are highly promising candidates for the selective absorption and removal of mercury ions from water.
汞具有高度毒性和危害性，广泛存在于污染的水中。为了从废水中去除汞离子，迫切需要研究和开发新的吸附剂。在此，我们通过简单的扩散法或溶剂热策略合成了三种新型硫醚基金属-有机骨架（MOFs），即[(ZnCl)(L)·χ（溶剂）]（1）、[(CuIO)(CHN)(L)(DMA)·3(HO)·χ（溶剂）]（2）和[(CuBr)(L)CHCN·χ（溶剂）]（3），其中 L = 1,3,5-三((吡啶-4-基硫代)甲基)苯和 L = 2,4,6-三甲氧基-1,3,5-三((吡啶-4-基硫代)甲基)苯。所得硫醚基 MOFs 通过单晶 X 射线衍射、傅里叶变换红外光谱、元素分析和热重分析进行了表征。进一步的研究表明，它们可以从水中去除汞。它们具有高吸附性（高达 362mg g）和高效去除汞（高达 95%）的能力。此外，这些 MOFs 可以回收，并可以在存在其他金属离子的情况下从水中选择性去除汞。因此，这些 MOFs 是从水中选择性吸收和去除汞离子的有前途的候选材料。
