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

T. Mitra, Florian Moreau, A. Nevin, C.U. Perotto, A. Summerfield, E.S. Davies, E.A. Gibson, T.L. Easun*, M. Schröder*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The application of metal–organic framework (MOF) materials in electrochemical and electrochromic devices remains 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-186 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-186 demonstrates the formation of a stable radical species [MFM-186]˙+ on electrochemical oxidation, and this has been characterised by electrochemical, spectroelectrochemical and EPR spectroscopic techniques coupled to DFT analysis.

Original languageEnglish
Pages (from-to)6572-6579
Number of pages8
JournalChemical Science
Volume9
Issue number31
Early online date4 Jun 2018
DOIs
Publication statusPublished - 21 Aug 2018

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