Organic transformations using electro-generated polyoxometalate redox mediators

Stergiou, A. D. and Symes, M. D. (2022) Organic transformations using electro-generated polyoxometalate redox mediators. Catalysis Today, 384-86, pp. 146-155. (doi: 10.1016/j.cattod.2021.05.003)

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The use of electrochemistry in organic synthesis (sometimes termed electro-organic synthesis, or just “electrosynthesis”) is a field that is attracting ever-increasing attention on account of its ability to deliver reaction outcomes that cannot be achieved in any other way and on account of its potential to replace toxic and/or sacrificial reagents with cleanly-generated electricity. In the simplest incarnation of electro-organic synthesis, an organic substrate undergoes direct electron transfer with the electrode in a type of heterogeneous catalysis process. However, such direct electrochemical processes may suffer from slow kinetics, poor product selectivities and/or lack of control over the extent of electron transfer to the substrate, all of which can lead to sub-optimal reaction outcomes. A distinct, but extremely important, sub-section of electro-organic synthesis (so-called “indirect electrolysis”) circumvents these limitations through the use of soluble redox mediator molecules, which act as electron shuttles between the heterogeneous electrode and the organic substrate in bulk solution. The advantages of indirect electrolysis for a number of organic transformations is now becoming increasingly clear, typically using either very simple metal salts or small organic molecules as the mediators. However, one particular class of mediators, the polyoxometalates (well-defined, soluble metal oxide clusters), offers an especially wide diversity of structures and properties that could revolutionise indirect electrolysis for electro-organic synthesis. In this review, we provide a collation of reports that describe use of electro-generated polyoxometalate redox mediators for organic transformations, with a particular focus on the most recent and most exciting results.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Stergiou, Mr Athanasios and Symes, Professor Mark
Authors: Stergiou, A. D., and Symes, M. D.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Catalysis Today
ISSN (Online):1873-4308
Published Online:11 May 2021
Copyright Holders:Copyright © 2021 Elsevier B.V.
First Published:First published in Catalysis Today 384-386: 146-155
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
173495Driving energetically uphill processes using metal-ligand coordination complexesMark SymesThe Royal Society (ROYSOC)UF150104Chemistry