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Updated: May 20, 2026

High Resolution Physical Characterization of Single Metallic Nanoparticles
Published on: June 28, 2019
Peroxo-Containing Heteropolyanions [{XW3O7(O2)2}2O]6- (X = HPO42-, HAsO42-, CH3AsO32-): Synthesis, Structure, and
Sahar Khandan1, Anupam Sarkar1, Arun Pal1
1School of Science, Constructor University, Campus Ring 1, Bremen 28759, Germany.
Abstract:
We report the synthesis of the peroxo-containing heteropolyanions [{XW3O7(O2)2}2O]6- (X = HPO42-, HAsO42-, CH3AsO32-) obtained in aqueous medium via a straightforward one-pot reaction in the presence of H2O2. Single-crystal X-ray diffraction analysis reveals that all polyanions adopt dimeric structures composed of two {XW3} subunits interconnected by three oxo bridges. In each {XW3} unit, two peroxo groups are coordinated to tungsten centers situated in adjacent edge-sharing pentagonal bipyramids, whereas the third tungsten center adopts a regular octahedral environment bearing exclusively terminal oxo ligands. The solution stability of the polyanions was systematically investigated over a range of pH values and time intervals by multinuclear NMR spectroscopy. The antibacterial screening of the peroxo-tungstoarsenate(V) and its organoarsonate(V) derivative was performed against representative Gram-negative and Gram-positive bacterial strains.
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