A FT-IR absorption analysis of vibrational properties of water encaged in NaA zeolites: evidence of a “structure maker” role of zeolitic surface
Physics Department & INFM, Messina University, C.da Papardo, S.ta Sperone 31, P.O. BOX 55, 98166 S. Agata, Messina, Italy
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Published online: 5 November 2003
We performed, in the O-H stretching region, Fourier-transform Infrared (FT-IR) Absorption measurements for investigating the vibrational dynamics on water confined in NaA zeolite, vs. temperature and for different hydration percentages. The spectral substructure of the O-H stretching band is explained postulating the existence of three major components centred at ∼3290 cm-1 (ω 1), ∼3470 cm-1 (ω 2), ∼3590 cm-1 (ω 3), with different dynamical properties traced over the full T-range investigated.
PACS: codes. – 78.30.-j - Infrared and Raman spectra / codes. – 78.30.Cp - Liquids
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003