A Water-Stable Cationic Metal-Organic Framework as a Dual Adsorbent of Oxoanion Pollutants

Angew Chem Int Ed Engl. 2016 Jun 27;55(27):7811-5. doi: 10.1002/anie.201600185. Epub 2016 Feb 8.

Abstract

A three-dimensional water-stable cationic metal-organic framework (MOF) pillared by a neutral ligand and with Ni(II) metal nodes has been synthesized employing a rational design approach. Owing to the ordered arrangement of the uncoordinated tetrahedral sulfate (SO4 (2-) ) ions in the channels, the compound has been employed for aqueous-phase ion-exchange applications. The compound exhibits rapid and colorimetric aqueous-phase capture of environmentally toxic oxoanions (with similar geometries) in a selective manner. This system is the first example of a MOF-based system which absorbs both dichromate (Cr2 O7 (2-) ) and permanganate (MnO4 (-) ) ions, with the latter acting as a model for the radioactive contaminant pertechnetate (TcO4 (-) ).

Keywords: adsorption; anions; environment chemistry; metal-organic frameworks; sensors.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Anions / isolation & purification
  • Cations / chemistry
  • Chromates / isolation & purification*
  • Manganese Compounds / isolation & purification*
  • Metal-Organic Frameworks / chemistry*
  • Models, Molecular
  • Nickel / chemistry*
  • Oxides / isolation & purification*
  • Sodium Pertechnetate Tc 99m / isolation & purification*
  • Water / chemistry
  • Water Pollutants / isolation & purification*
  • Water Pollutants, Chemical / isolation & purification
  • Water Pollutants, Radioactive / isolation & purification

Substances

  • Anions
  • Cations
  • Chromates
  • Manganese Compounds
  • Metal-Organic Frameworks
  • Oxides
  • Water Pollutants
  • Water Pollutants, Chemical
  • Water Pollutants, Radioactive
  • Water
  • permanganic acid
  • Nickel
  • Sodium Pertechnetate Tc 99m