Jump to main content
Jump to site search

Issue 37, 2017
Previous Article Next Article

One-step synthesis of two Wells–Dawson arsenotungstate hybrids via M–O–M bridges for efficient adsorption and selective separation of organic pollutants

Author affiliations

Abstract

Two unique hybrids based on Wells–Dawson polyoxometalates, [Cu(en)2(OH2)]2[{Cu(en)2}{As2WV2WVI16O61}]·6H2O (1) and (H2dap)[Cu(H2dap)(H2O)2][{Cu(dap)(H2O)2}{As2W17CuO61}]·5H2O (2) (en = ethylenediamine and 1,2-dap = 1,2-diaminopropane), have been synthesized hydrothermally by reaction of Na2WO4, NaAsO2 and CuCl2 with 1,2-dap or en, and further characterized by elemental analysis, infrared radiation (IR) spectrophotometry, ultraviolet (UV) spectroscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and single crystal X-ray diffraction. In compounds 1 and 2, the emerging building blocks link into new one-dimensional (1D) chain-like Wells–Dawson architectures via two M–O–M (M = Cu/W) and O–Cu–O bridges, which are rarely observed among this arsenotungstate class. The 1D chain-like architectures further extend into 3D supramolecular frameworks through hydrogen bond interactions. They represent the first family of Dawson-type double-bridge arsenotungstate chains built from M–O–M and Cu–L linkers. Compounds 1 and 2 have exhibited electrocatalytic activity toward the reduction of nitrite. Adsorption experiments show that the compounds have the ability to selectively adsorb MB from binary mixed dye solutions (MB and MO and MB and RhB). These compounds still maintain their excellent stability and adsorption properties after several cycles.

Graphical abstract: One-step synthesis of two Wells–Dawson arsenotungstate hybrids via M–O–M bridges for efficient adsorption and selective separation of organic pollutants

Back to tab navigation

Supplementary files

Publication details

The article was received on 18 Jul 2017, accepted on 20 Aug 2017 and first published on 21 Aug 2017


Article type: Paper
DOI: 10.1039/C7CE01307H
Citation: CrystEngComm, 2017,19, 5653-5661
  •   Request permissions

    One-step synthesis of two Wells–Dawson arsenotungstate hybrids via M–O–M bridges for efficient adsorption and selective separation of organic pollutants

    L. Liu, B. Wang, J. H. Lv, K. Yu, L. Wang, H. Zhang, S. Wang and B. B. Zhou, CrystEngComm, 2017, 19, 5653
    DOI: 10.1039/C7CE01307H

Search articles by author

Spotlight

Advertisements