Abstract.
In order to explore the influence of nanoscopic confinement on the vibrational properties of H-bonded liquids, we performed a detailed Raman scattering study, as a function of temperature, on water confined in 75 Å and 200 Å pores of a Gelsil glass. A detailed evaluation of the observed changes in the O-H stretching profile has been achieved by decomposing the O-H band into individual components, corresponding to those found for bulk water and associated to different levels of water connectivity. As main result, a similar effect produced by enlarging pore diameter and lowering T has been put into evidence. Again, the “structure-breaker” role of the GelSil glass on physisorbed water is confirmed and shown to be enhanced by the diminishing of the pore size.
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Crupi, V., Longo, F., Majolino, D. et al. Raman spectroscopy: Probing dynamics of water molecules confined in nanoporous silica glasses. Eur. Phys. J. Spec. Top. 141, 61–64 (2007). https://doi.org/10.1140/epjst/e2007-00018-x
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DOI: https://doi.org/10.1140/epjst/e2007-00018-x