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Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
Switchable High-Valent Ag3+/Ag+ Redox Pair Stabilized in Polyoxometalate as Highly Oxidative "Electron Shuttle"
Xiang Li1, Hehua Hui2, Yuanhang Ren2
1Department of Chemistry, University of Oxford, Oxford OX1 3QR, England, U.K.
Abstract:
We report the isolation and characterization of the first example of a crystallized high-valent Ag3+-containing polyoxometalate (POM) complex, Cs7K4[P2W19AgIIIO69(OH2)]·17H2O (1), as a "catalyst bearing catalyst" capable of catalyzing the formation of the high-valent Ni3+-containing POMs in the presence of peroxydisulfate. The oxidation state and exotic chemical behaviors of Ag in 1 were confirmed by crystallographic, spectroscopic, and electrochemical characterizations. The Ag3+/Ag+ redox pair embedded in 1 showed good electrochemical reversibility and the ability to accelerate electron transfer, contributing to the observed catalytic activity of 1 in both formation of other high-valent metal-containing POMs and electrochemical oxidative C-H activation.
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