New Insights about Vanadium-containing POMs built from [AsW9O33]9- and Host-Guest Chemistry with Hybrid Lindqvist anions - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2020

New Insights about Vanadium-containing POMs built from [AsW9O33]9- and Host-Guest Chemistry with Hybrid Lindqvist anions

Clément Falaise
Gildas K Gbassi
  • Fonction : Auteur
Mohamed Haouas
Nathalie Leclerc
  • Fonction : Auteur
  • PersonId : 1110526
Emmanuel Cadot
Jérôme Marrot

Résumé

Polyoxometalates (POMs) are polyanions composed mainly of Mo, W and V in their highest oxidation states. Due to their outstanding properties and structural diversity, POMs can be used in many fields of application, especially in environmental applications such as photodegradation of organic , and inorganic pollutants. In this context, vanadium-containing POMs have a high redox potential and an absorption in the visible regions, appear as an interesting platform for the photo-oxidation of pollutants. Here, we report on the one hand, new perspectives on vanadium-containing heteropolytungtates (HPWVs) and on the other hand the host-guest chemistry of Lindqvist hybrid anions with cyclodextrins. HPWVs were synthesized in aqueous medium, from tri-lacunar Keggin containing heteroatoms (AsIII, SbIII, TeIV) and in the presence of vanadyls(VO2+). The characterization by XRD reveals that they consist of two tri-lacunar [XW9O33]n- {n= 9, (X= As, Sb); n=8, X=Te} units connected by a triangular or hexagonal belt composed of VO2+ vanadyls. In the course of our research, we also identified unconventional and novel arrangements of Keggin ions that were also identified and characterized in solution by NMR (see fig B). Then, the reactivity of these entities was studied in solution by UV-visible spectroscopy and electrochemistry.

Domaines

Chimie
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Dates et versions

hal-04400164 , version 1 (17-01-2024)

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  • HAL Id : hal-04400164 , version 1

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Fa Ibrahima Bamba, Clément Falaise, Gildas K Gbassi, Mohamed Haouas, Nathalie Leclerc, et al.. New Insights about Vanadium-containing POMs built from [AsW9O33]9- and Host-Guest Chemistry with Hybrid Lindqvist anions. Journée de la division de Chimie de Coordination, JCC-2020, SCF, Jan 2020, Université Aix Marseille, Marseilles, France. ⟨hal-04400164⟩
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