Neutron scattering study of water confined in periodic mesoporous organosilicas

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.05.017· OSTI ID:21421563

Levy, Esthy ^[1]; Kay Chan, Lok ^[2]; Dehong, Yu ^[3]; Marek Koza, Michael ^[4]; Mastai, Yitzhak ^[1]; Ford, R C ^[2]; Li, Jichen ^[5]

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1. Department of Chemistry, Institute of Nanotechnology, Bar-Ilan University (Israel)
2. Faculty of Life Sciences, University of Manchester (United Kingdom)
3. Bragg Institute, Australian Nuclear Science and Technology Organisation, PMB 1, Menai NSW 2234 (Australia)
4. Institute Laue Langevin, 6 rue Jules Horowitz, BP156, F-38042 Grenoble (France)
5. Department of Physics and Astronomy, University of Manchester, Manchester (United Kingdom)

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 <u{sup 2}> of the external water increases with T almost linearly up to 353 K, while the internal water quickly reaches the maximum at T{approx}323 K, indicating the confinement by an averaged pore diameter of the porous organosilica. - Graphical abstract: This paper concerns measurement of water dynamics associated within hydrophobic mesoporous organosilica material with phenyl functions as investigated using the quasielastic neutron scattering technique. By fitting the quasielastic neutron scattering results with Debye Waller factor, it show clearly the different behavior between water h inside and outside the hydrophobic pores.

• OSTI ID: 21421563
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 7; Other Information: DOI: 10.1016/j.jssc.2010.05.017; PII: S0022-4596(10)00206-9; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
DEBYE-WALLER FACTOR
DIFFUSION
HYDRATION
NANOSTRUCTURES
NEUTRON DIFFRACTION
ORGANIC SILICON COMPOUNDS
POROUS MATERIALS
QUASI-ELASTIC SCATTERING
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
WATER
COHERENT SCATTERING
DIFFRACTION
DIRECT REACTIONS
HYDROGEN COMPOUNDS
MATERIALS
NUCLEAR REACTIONS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
QUASI-FREE REACTIONS
SCATTERING
SOLVATION
TEMPERATURE RANGE