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Raman and infrared study on the effects of dimethylsulphoxide (DMSO) on water structure
Author(s) -
Bertoluzza A.,
Bonora S.,
Battaglia M. A.,
Monti P.
Publication year - 1979
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250080502
Subject(s) - raman spectroscopy , aqueous solution , chemistry , molecule , infrared , infrared spectroscopy , liquid water , spectral line , water cluster , analytical chemistry (journal) , inorganic chemistry , organic chemistry , hydrogen bond , thermodynamics , optics , physics , astronomy
Raman and infrared spectra of liquid dimethylsulphoxide (DMSO) and DMSO‐water mixtures in a wide range of concentrations are reported and discussed. It is found that changes in the vibrational spectra can be related to a gradual insertion of water molecules in the cluster structure of liquid DMSO. In the more dilute aqueous solutions a gradual lowering of the ν s =0 stretching frequency is observed and this can be related to the cooperative character of DMSO–water interactions. The interpretation of the spectra is in agreement with the capacity of DMSO for ‘breaking’ the structure of water in the more concentrated aqueous solutions and ‘enhancing’ it in very dilute solutions.