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Persistent URL
http://purl.org/net/epubs/work/56000
Record Status
Checked
Record Id
56000
Title
Interaction of single water molecules with silanols in mesoporous silica
Contributors
C Pantalei
,
R Senesi
,
C Andreani
,
P Sozzani
,
A Comotti
,
S Bracco
,
M Beretta
,
PE Sokol
,
G Reiter
Abstract
Deep Inelastic Neutron Scattering measurements of water confined in mesoporous silica have been carried out. The experiment has been performed at room temperature on dry and on hydrated samples in order to investigate the interaction between the protons and the silanol groups of the confining surface. With this aim we could control the hydration of the pores in such a way as to adsorb 3.0 water molecules per nm(2), corresponding to a 1 to 1 ratio with the silanol groups of the surface. DINS measurements directly measure the mean kinetic energy and the momentum distribution of the protons. A detailed analysis of the hydrated sample has been performed in order to separate the contributions of the protons in the system, allowing us to determine the arrangement of water molecules on the silanol groups. We find that the hydrogen bond of the water proton with the oxygen of the silanol group is much stronger than the hydrogen bonds of bulk water.
Organisation
ISIS
,
STFC
Keywords
materials
,
physics
,
chemistry
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Phys Chem Chem Phys
13, no. 3 (2011): 6022-6028.
doi:10.1039/c0cp02479a
2011
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