| Title | Fluorine-Containing Triazole-Decorated Silver(I)-Based Cationic Metal-Organic Framework for Separating Organic Dyes and Removing Oxoanions from Water |
| Authors | Kumar, Sandeep Liu, Songyuan Mohan, Brij Zhang, Mingjian Tao, Zhiyu Wan, Zhijian You, Hengzhi Sun, Feiyun Li, Mu Ren, Peng |
| Affiliation | Harbin Inst Technol Shenzhen, Sch Sci, Shenzhen 518055, Peoples R China Peking Univ, Sch Adv Mat, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China Harbin Inst Technol Shenzhen, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China Tshinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen Environm Engn Sci & New Energy Lab, Shenzhen 518055, Peoples R China |
| Keywords | AQUEOUS-SOLUTION ACTIVE-SITES ADSORPTION IONS MOFS CAPTURE DEGRADATION ABSORPTION CLUSTER SINGLE |
| Issue Date | 17-May-2021 |
| Publisher | INORGANIC CHEMISTRY |
| Abstract | Four new triazole-decorated silver(I)-based cationic metal-organic frameworks (MOFs), {[Ag(L1)](BF4)}(n) (1), {[Ag(L1)](NO3)}(n) (2), {[Ag(L2)](BF4)}(n) (3), and {[Ag(L2)](NO3)}(n) (4), have been synthesized using two newly designed ligands, 3-fluoro-5-(4H-1,2,4-triazol-4-yl)pyridine (L1) and 3-(4H-1,2,4-triazol-4-yl)-5-(trifluoromethyl)pyridine (L2). When the fluorine atom was changed to a trifluoromethyl group at the same position, tremendous enhancement in the MOF dimensionality was achieved [two-dimensional to three-dimensional (3D)]. However, changing the metal salt (used for the synthesis) had no effect. The higher electron-withdrawing tendency of the trifluoromethyl group in L2 aided in the formation of higher-dimensional MOFs with different properties compared with those of the fluoro derivatives. The fluoride group was introduced in the ligand to make highly electron-deficient pores inside the MOFs that can accelerate the anion-exchange process. The concept was proved by density functional theory calculation of the MOFs. Both 3D cationic MOFs were used for dye adsorption, and a remarkable amount of dye was adsorbed in the MOFs. In addition, owing to their cationic nature, the MOFs selectively removed anionic dyes from a mixture of anionic, cationic, and neutral dyes in the aqueous phase. Interestingly, the present MOFs were also highly effective for the removal of oxoanions (MnO4- and Cr2O72-) from water. |
| URI | http://hdl.handle.net/20.500.11897/614372 |
| ISSN | 0020-1669 |
| DOI | 10.1021/acs.inorgchem.0c03688 |
| Indexed | SCI(E) |
| Appears in Collections: | 新材料学院 |
