Abstract
With various concentrations of CaCl 2 and MgCl 2 aqueous solution below 1.0 mol/l, Raman spectra of water in the OH stretch region of 2500–4000 cm −1 and 17O NMR chemical shift of water are measured and the Raman spectra are deconvoluted. Both Raman spectra and 17O NMR of water show that the effect of Ca 2+ on water structure is stronger than that of Mg 2+. CaCl 2 and MgCl 2 destroy four hydrogen bonded water structure, but promote median water cluster size.
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