Raman and FT IR ATR study of diethylsulfoxide/water mixtures
2003; Elsevier BV; Volume: 655; Issue: 2 Linguagem: Inglês
10.1016/s0022-2860(03)00313-2
ISSN1872-8014
AutoresShiraz A. Markarian, Ashkhen L. Zatikyan, Sergio Bonora, C. Fagnano,
Tópico(s)Phase Equilibria and Thermodynamics
ResumoThe Raman and FT IR ATR spectra of diethylsulfoxide (DESO)-water mixtures in the SO and C–H stretching vibration regions at different molar ratios are considered. Noticeable changes are observed in the νSO region, suggesting the existence of strong H-bonds between DESO and water molecules; on the contrary the νCH bands change only in a less extent, supporting the existence of SO⋯HC hydrogen bonds in pure DESO that gradually break in the presence of water. In addition, FT IR measurements confirm the existence of 'free' SO group at low concentrations of DESO. The results obtained are well explainable in frame of the cluster-structure model of liquid water.
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