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Characterisation of redox states of metal-organic frameworks by growth on modified thin-film electrodes

Mitra, Tamoghna, Moreau, Florian, Nevin, Adam, Perotto, Carlo, Summerfield, Alex, Davies, E Stephen, Gibson, Elizabeth, Easun, Timothy and Schroder, Martin 2018. Characterisation of redox states of metal-organic frameworks by growth on modified thin-film electrodes. Chemical Science 9 (31) , pp. 6572-6579. 10.1039/C8SC00803E

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Abstract

The application of metal-organic framework (MOF) materials in electrochemical and electrochromic devices remain rare. One of the main reasons for this is the inability to readily access their detailed electrochemistry. The inherent insolubility of these materials does not allow interrogation by traditional solution-based electrochemical or spectroscopic methods. In this study, we report a straightforward alternative approach to the spectroelectrochemical study of MOFs. We have used two systems as exemplars in this study, MFM-170 and MFM-180. The method involves chemical modification of a working electrode to attach MOF materials without using corrosive reagents such as inorganic acids or bases which otherwise could limit their application in device development. MFM-170 demonstrates the formation of a stable radical species [MFM-170]●+ on electrochemical oxidation, and this has been characterised by electrochemical, spectroelectrochemical and EPR spectroscopic techniques coupled to DFT analysis.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Publisher: Royal Society of Chemistry
ISSN: 2041-6520
Funders: Engineering and Physical Sciences Research Council, the European Research Council and the Royal Society
Date of First Compliant Deposit: 18 June 2018
Date of Acceptance: 28 May 2018
Last Modified: 15 Aug 2018 12:30
URI: http://orca.cf.ac.uk/id/eprint/112526

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