Neutron scattering study of water confined in periodic mesoporous organosilicas

Esthy Levy, Lok Kay Chan, Dehong Yu, Michael Marek Koza, Yitzhak Mastai, R. C. Ford, Jichen Li

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A series of quasi-elastic neutron scattering measurements were performed using IN6 at the Institute Laue Langevin for a mesoporous organosilica material with phenyl functions, called phenyltriethoxysilane (PTES). The aim of the experiment was to study the diffusion dynamics of nano-scale water clusters inside the hydrophobic pores as a function of temperature and hydration. By fitting the Debye-Waller factor, the data show clearly the different behavior between water, both inside and outside the hydrophobic pores, which resembles bulk water. The mean thermal displacement 〈u2〉 of the external water increases with T almost linearly up to 353 K, while the internal water quickly reaches the maximum at T∼323 K, indicating the confinement by an averaged pore diameter of the porous organosilica. © 2010 Elsevier Inc. All rights reserved.
    Original languageEnglish
    Pages (from-to)1691-1696
    Number of pages5
    JournalJournal of Solid State Chemistry
    Volume183
    Issue number7
    DOIs
    Publication statusPublished - Jul 2010

    Keywords

    • Ice
    • Inelastic neutron scattering
    • Mesoporous organosilica
    • Porous solids
    • Water

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