Raman spectra and O NMR study effects of CaCl2 and MgCl2 on water structure |
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Authors: | Ruihua Li Shaoqi Shi Hongwei Yang |
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Institution: | Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China |
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Abstract: | With various concentrations of CaCl2 and MgCl2 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 Ca2+ on water structure is stronger than that of Mg2+. CaCl2 and MgCl2 destroy four hydrogen bonded water structure, but promote median water cluster size. |
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Keywords: | Hydrogen bonding Water structure Raman spectra 17O NMR CaCl2 and MgCl2 |
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