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Host in Host Supramolecular Core-Shell Type Systems Based on Giant Ring-Shaped Polyoxometalates

Abstract : Herein, we show how the chaotropic effect arising from reduced molybdate ions in acidified aqueous solution is able to amplify drastically weak supramolecular interactions. Time-resolved Small Angle X-ray Scattering (SAXS) analysis suggests that molybdenum-blue oligomeric species form huge aggregates in the presence of γ-cyclodextrin (γ-CD) which results in the fast formation of nanoscopic {Mo(154) }-based host-guest species, while X-ray diffraction analysis reveals that the ending-point of the scenario results in an unprecedented three-component well-ordered core-shell-like motif. A similar arrangement was found by using preformed hexarhenium chalcogenide-type cluster [Re(6) Te(8) (CN)(6) ](4-) as exogenous guest. This seminal work brings better understanding of the self-assembly processes in general and gives new opportunities for practical applications in the design of complex multicomponent materials via the simplicity of the non-covalent chemistry.
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https://hal.archives-ouvertes.fr/hal-03194295
Contributor : Laurent Jonchère <>
Submitted on : Tuesday, April 13, 2021 - 12:47:11 PM
Last modification on : Friday, April 30, 2021 - 10:24:16 AM

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Clement Falaise, Soumaya Khlifi, Pierre Bauduin, Philipp Schmid, William Shepard, et al.. Host in Host Supramolecular Core-Shell Type Systems Based on Giant Ring-Shaped Polyoxometalates. Angewandte Chemie International Edition, Wiley-VCH Verlag, 2021, ⟨10.1002/anie.202102507⟩. ⟨hal-03194295⟩

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