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A Water‐Stable Cationic Metal–Organic Framework as a Dual Adsorbent of Oxoanion Pollutants
Author(s) -
Desai Aamod V.,
Manna Biplab,
Karmakar Avishek,
Sahu Amit,
Ghosh Sujit K.
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201600185
Subject(s) - cationic polymerization , chemistry , aqueous solution , permanganate , adsorption , inorganic chemistry , sulfate , metal organic framework , aqueous two phase system , ion exchange , phase (matter) , metal ions in aqueous solution , ligand (biochemistry) , metal , ion , organic chemistry , biochemistry , receptor
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 (SO 4 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 (Cr 2 O 7 2− ) and permanganate (MnO 4 − ) ions, with the latter acting as a model for the radioactive contaminant pertechnetate (TcO 4 − ).