Hexanuclear zirconium metal–organic frameworks (Zr6 MOFs) were successfully designed to possess different kinds of defects with various contents and its important influence on the capture of Se(VI) oxyanions was studied. The displaceable ligands (aqua and hydroxy groups) and weak-binding “capping” ligands (Cl−, O2C-CH3−, O2C-CF3− or O2C-CHF2−, HO− and/or H2O) on Zr6 nodes could be substituted by Se(VI)...
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