A Water‐Stable Cationic Metal–Organic Framework as a Dual Adsorbent of Oxoanion Pollutants. Issue 27 (8th February 2016)

• Record Type: Journal Article
• Authors: Desai, Aamod V.; Manna, Biplab; Karmakar, Avishek; Sahu, Amit; Ghosh, Sujit K.
• Is Part Of: Angewandte Chemie international edition. Volume 55:Issue 27(2016)
• Page Start: 7811
• Page End: 7815
• Publication Date: 2016-02-08
• Subjects: adsorption -- anions -- environment chemistry -- metal–organic frameworks -- sensors; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201600185
• Languages: English
• ISSNs: 1433-7851

Abstract

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 − ). Abstract : Selective uptake : A 3D water‐stable cationic metal–organic framework (MOF) containing free SO4 2− ions has been synthesized. The compound exhibits rapid, selective, and colorimetric aqueous‐phase capture of environmentally toxic oxoanions. This system is the first example of a MOF‐based adsorbent of both Cr2 O7 2− and MnO4 − ions, with the latter acting as a model for the radioactive contaminant TcO4 − .