A comparative study on the immobilization of organic-inorganic polyoxometalates hybrids onto gold electrodes: Direct versus indirect, covalent versus electrostatic grafting

Abstract We explored the conditions of the covalent grafting of organic-inorganic polyoxometalate hybrids onto gold using two basic reactions: the peptide-type coupling between a functionalized POM and a preformed organic self-assembled monolayer and the direct attachment of a thiol-terminated POM. We aimed at demonstrating that the variability of the POM loading is an inherent parameter of chemical reactions carried out under heterogeneous conditions that should be systematically assessed. Mitigation measures include a careful preparation and characterization of the substrates at every step before the final POM anchoring. Moreover, a very fast electron transfer across a gold microelectrode and a POM layer was achieved in the case of a very short tether.

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Publication Details

Journal
Polyoxometalates
Published
2026-10-16
DOI
https://doi.org/10.26599/pom.2026.9140167
Primary Topic
Polyoxometalates: Synthesis and Applications
Type
article
Field-Weighted Citation Impact
0.00

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article

A comparative study on the immobilization of organic-inorganic polyoxometalates hybrids onto gold electrodes: Direct versus indirect, covalent versus electrostatic grafting

Guillaume Izzet, Maxime Laurans, Vincent Humblot, Richard Villanneau et al.
Polyoxometalates
Polyoxometalates: Synthesis and Applications
article

A comparative study on the immobilization of organic-inorganic polyoxometalates hybrids onto gold electrodes: Direct versus indirect, covalent versus electrostatic grafting

Guillaume Izzet, Maxime Laurans, Vincent Humblot, Richard Villanneau, Anna Proust, Emmanuel Maisonhaute, Florence Volatron, Laure Fillaud, Kevin Dalla Francesca
article en

Abstract

Abstract We explored the conditions of the covalent grafting of organic-inorganic polyoxometalate hybrids onto gold using two basic reactions: the peptide-type coupling between a functionalized POM and a preformed organic self-assembled monolayer and the direct attachment of a thiol-terminated POM. We aimed at demonstrating that the variability of the POM loading is an inherent parameter of chemical reactions carried out under heterogeneous conditions that should be systematically assessed. Mitigation measures include a careful preparation and characterization of the substrates at every step before the final POM anchoring. Moreover, a very fast electron transfer across a gold microelectrode and a POM layer was achieved in the case of a very short tether.

Polyoxometalates
Centre National de la Recherche Scientifique (FR), Université de Versailles Saint-Quentin-en-Yvelines (FR), Université Paris-Saclay (FR), Sorbonne Université (FR), Laboratoire Interfaces et Systèmes Électrochimiques (FR), Université Bourgogne Franche-Comté (FR), Institut Parisien de Chimie Moléculaire (FR), Laboratoire de Réactivité de Surface (FR), Institut Lavoisier de Versailles (FR)
Centre National de la Recherche Scientifique, Sorbonne Université
Openalex Percentile: Top 29%
Polyoxometalates: Synthesis and Applications
DOIOpen Access PDFOpenAlex
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