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Electrochemical Grafting of Aryl Diazonium Salts in Deep Eutectic Solvents

Abstract : Deep eutectic solvents are seen as a new class of green and cheap solvents in electrochemical processes. Many electrochemical deposition techniques have been reported in the literature mainly focusing on metal electrodeposition and electro-polymerization. Here, we report for the first time the efficient electro-grafting of aryl diazonium salts on carbon surfaces using ethaline as an example of a natural and biodegradable deep eutectic solvent. Three different aryl diazonium salts have been tested, namely the 4-iodophenyldiazonium ion, 4-carboxymethylphenyl diazonium ion and 4-ethynylphenyldiazonium ion. Effect of concentration, deposition time and potential have been studied in relation to electrode blocking behavior toward redox probes in solution and deposited organic films thickness. Post-functionalization with redox active moieties is demonstrated on such electro-grafted organic layer to show their potential usefulness.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-03127013
Contributor : Yann Leroux <>
Submitted on : Monday, February 1, 2021 - 11:28:13 AM
Last modification on : Tuesday, June 1, 2021 - 3:31:58 AM
Long-term archiving on: : Sunday, May 2, 2021 - 7:03:37 PM

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Quentin Lenne, Vivien Andrieux, Gaël Levanen, Jean-Francois Bergamini, Pauline Nicolas, et al.. Electrochemical Grafting of Aryl Diazonium Salts in Deep Eutectic Solvents. Electrochimica Acta, Elsevier, 2021, 369, pp.137672. ⟨10.1016/j.electacta.2020.137672⟩. ⟨hal-03127013⟩

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