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Title

Pore size dependent dynamics of confined water probed by FIR spectroscopy

AuthorsPérez-Hernández, Natalia ; Quan Luong, Trung; Pérez, Cirilo ; Martín, Julio D.; Havenith, Martina
KeywordsFIR spectroscopy
Assembly
Clusters
Macromolecules
Proteins
FTIR-ATR
Diamond
Absorbance spectra
Pores
Membranes
Water
temperature
Issue Date11-May-2010
PublisherRoyal Society of Chemistry (UK)
CitationPhysical Chemistry Chemical Physics 12: 6928-6932 (2010)
AbstractWe measured the FIR (Far Infrared) absorbance of a series of organic hydrated sub-nanopores (i.e.pores of the size of several Å) containing confined water. Our results show that the FIR frequency region between 400 and 570 cm−1 is sensitive to the differences in water mobility. The absorbance of these compounds was significantly higher than that of chemically similar anhydrous or non-porous hydrated compounds in the same region. Moreover, changes in the water dynamics inside the hydrated pores were found and characterized by their temperature dependent studies in the range from −5 to 20 °C. Upon increasing the temperature, water confined in narrow pores shows a small increase in FIR absorbance, while less confined water molecules inside larger pores exhibit a higher increase in absorbance, resembling more what has been observed for bulk water.
Description5 páginas, 5 figuras, 1 esquema.
Publisher version (URL)http://dx.doi.org/10.1039/C000985G
URIhttp://hdl.handle.net/10261/37784
DOI10.1039/C000985G
ISSN1463-9076
Appears in Collections:(IIQ) Artículos
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