Eur. Phys. J. E (2003) 12: 55-58
https://doi.org/10.1140/epjed/e2003-01-014-4

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

^* e-mail: vvenuti@dsme01.unime.it

Received: 1 January 2003
Published online: 5 November 2003

Abstract

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.