Calix[4]arene-modified silica nanoparticles for the potentiometric detection of iron (III) in aqueous solution

Matthieu Becuwe (1) , P. Rouge (2) , Christel Gervais (3) , D. Cailleu , M. Courty , A. Dassonville-Klimpt , Pascal Sonnet , E. Baudrin

1 LRCS - Laboratoire réactivité et chimie des solides - UMR CNRS 7314
2 LG - Laboratoire des Glucides
3 SMiLES - Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé

This article aims to present the synthesis and the characterization of a novel hybrid material, based on silica nanoparticles, and which can be used as a sensitive element for the electrochemical detection of iron (III). This material was obtained by grafting an iron ligand-based calix[4]arene structure onto nanosized silica particles. The covalent anchoring of the chelator was obtained by nucleophilic coupling reaction between the modified calix[4]arene and the chloropropyl functionalized silica. The grafting reaction was confirmed by FTIR (DRIFT), solid-state 13C Cross-Polarization MAS (CPMAS) NMR and thermal analysis. The interaction between the material and the dissolved iron (III) was demonstrated though potentiometric measurements. A linear evolution of the open circuit potential, which can be used analytically for iron (III) detection, has been obtained.

Mots clés: ICL670; Iron sensor; Potentiometry; Calix[4]arene

Domaines: Matériaux

Matthieu Becuwe, P. Rouge, Christel Gervais, D. Cailleu, M. Courty, et al.. Calix[4]arene-modified silica nanoparticles for the potentiometric detection of iron (III) in aqueous solution. Comptes Rendus. Chimie, 2012, 15 (4), pp.290-297. ⟨10.1016/j.crci.2011.12.008⟩. ⟨hal-01468410⟩