Effect of salts on dynamics of water: A Raman spectroscopy study

Abstract

In this work, we have studied, by means of Raman spectroscopy, water-additives interactions in the case of alkaline halogenides aqueous solutions. We have obtained some parameters describing the evolution of water structure vs concentration or the nature of the added salts. These parameters show, as previously described, a more important effect of anions than cations. Next, the evolution of the dynamical properties of the solution depends on the size of the ions. Moreover, the development of a new band in the isotropic part of the salts solutions spectra is attributed to water–ions interactions involved in the dynamics of hydration shells.

Probing water dynamics with OH−

“…Several studies have also been performed on electrolyte solutions [13][14][15][16], but the hydroxide solutions have received less attention than others and are only rarely quoted in the literature [17][18][19]. Based on the present knowledge about the microscopic structure of hydroxide aqueous solutions [20][21][22][23][24], these look instead very interesting.…”

Water structure in aqueous solutions of alkali halide salts: FTIR spectroscopy of the OD stretching band

“…Soluble salt hydration has been the subject of studies with different experimental techniques including infrared [4][5][6][7][8], Raman [9][10][11][12], and femtosecond pump-probe [13] spectroscopies, X-ray diffraction [14], neutron scattering [15][16][17], and with computer simulation methods [18][19][20]. There are two general trends in these investigations.…”

Magneto-Optical Characteristics of Human Serum

“…The disappearance of the local maximum Ieu/N for the samples of blood serum from cancer patients is explained by destruction of the tetrahedral structure of water as a result of the presence of neoplasmic mutants of proteins [8]. The evidence of destruction of the tetrahedral structure of water was also observed to be caused by the presence of salts in high concentrations [9]. In the blood serum samples from healthy people, the tetrahedral structure of water is preserved [8] as it is in solutions of low concentration of salts [9].…”

“…The evidence of destruction of the tetrahedral structure of water was also observed to be caused by the presence of salts in high concentrations [9]. In the blood serum samples from healthy people, the tetrahedral structure of water is preserved [8] as it is in solutions of low concentration of salts [9].…”