Confined H$_2$O molecules as local probes of pressure-induced amorphisation in faujasite - Laboratoire Charles Coulomb (L2C) Accéder directement au contenu
Article Dans Une Revue Physical Chemistry Chemical Physics Année : 2014

Confined H$_2$O molecules as local probes of pressure-induced amorphisation in faujasite

Claire Levelut
Aude Isambert
Philippe Hébert
  • Fonction : Auteur
David Maurin
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Tahar Hammouda
Denis Andrault

Résumé

Confined H$_2$O molecules act as local probes for depressurization phenomena during the pressure induced amorphisation of faujasite NaX at which the OH stretching frequency first decreases and then increases almost to its room pressure value upon further compression. Pair distribution function (PDF) analysis provides evidence that amorphisation corresponds to a collapse of the structure around hydrated sodium cations with strong distortion of the secondary building units (double six-membered rings, sodalite cages). Both the use of guest molecules as local probes in far- and mid-infrared spectroscopy, where we correlate intermolecular water H bonding vibrations and internal mode behaviour under confinement, and PDF analysis could be of great use to study the mechanical behaviour of other hydrated materials.

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Dates et versions

hal-01135023 , version 1 (02-12-2017)

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Jadna Catafesta, Frederico Alabarse, Claire Levelut, Aude Isambert, Philippe Hébert, et al.. Confined H$_2$O molecules as local probes of pressure-induced amorphisation in faujasite. Physical Chemistry Chemical Physics, 2014, 16, pp.12202-12208. ⟨10.1039/C4CP00186A⟩. ⟨hal-01135023⟩
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