Nonconventional Three-Component Hierarchical Host-Guest Assembly Based on Mo-Blue Ring-Shaped Giant Anion, gamma-Cyclodextrin, and Dawson-type Polyoxometalate

Abstract : In this communication, we report on a noteworthy hybrid supramolecular assembly built from three functional components hierarchically organized through noncovalent interactions. The one-pot synthesis procedure leads to the formation of large Mo-blue ring-shaped anion {Mo-154}, which contains the supramolecular adduct based on the symmetric encapsulation of the Dawson-type [P2W18O62](6) anion by two gamma-cyclodextrin units. Such a nanoscopic onion-like structure, noted [P2W18O62]@2 gamma-CD@{Mo-154} has been characterized by single-crystal X-ray diffraction, thus demonstrating the capability of the giant inorganic torus to develop relevant supramolecular chemistry, probing the strong affinity of the inner and outer faces of the gamma-CD for the polyoxometalate surfaces. Furthermore, interactions and behavior in solution have been studied by multinuclear NMR spectroscopy, which supports specific interactions between gamma-CD and POM units. Finally, the formation of this three-component hybrid assembly from one-pot procedure, in water and using nearly stoichiometric conditions, is discussed in terms of the driving forces orchestrating this highly efficient multilevel recognition process.
Type de document :
Article dans une revue
Journal of the American Chemical Society, American Chemical Society, 2017, 139 (41), pp.14376-14379. 〈10.1021/jacs.7b08058〉
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01631922
Contributeur : Laurent Jonchère <>
Soumis le : jeudi 9 novembre 2017 - 17:40:35
Dernière modification le : jeudi 11 janvier 2018 - 15:10:57

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Mhamad Aly Moussawi, Mohamed Haouas, Sébastien Floquet, William E. Shepard, Pavel A. Abramov, et al.. Nonconventional Three-Component Hierarchical Host-Guest Assembly Based on Mo-Blue Ring-Shaped Giant Anion, gamma-Cyclodextrin, and Dawson-type Polyoxometalate. Journal of the American Chemical Society, American Chemical Society, 2017, 139 (41), pp.14376-14379. 〈10.1021/jacs.7b08058〉. 〈hal-01631922〉

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