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Citation: Li Rui-Hua, Jiang Zhan-Peng, Shi Shao-Qi, Yang Hong-Wei. Raman Spectroscopic Study of Effect of CaCl₂ and MgCl₂ on Structure of Water[J]. Acta Physico-Chimica Sinica, ;2003, 19(02): 154-157. doi: 10.3866/PKU.WHXB20030213 shu

Raman Spectroscopic Study of Effect of CaCl₂ and MgCl₂ on Structure of Water

1.
Department of Environmental Science and Engineering, Tsinghua University, Beijing　100084

Received Date: 16 April 2002
Available Online: 15 February 2003

Raman spectra of aqueous solutions of CaCl2 and MgCl2 in the OH stretching region (2 500 to 4 000 cm－1) with various concentrations below 1.0 mol•L－1 were measured. Computer deconvolutions of the Raman spectra allow the percent of tetrahedral hydrogen bonded structure of water to be determined. It is shown that CaCl2 and MgCl2 break tetrahedral hydrogen bonded structure of water and the breaking effect of Ca2＋ is stronger than that of Mg2＋. By comparison with results of 17O NMR, it is deduced that CaCl2 and MgCl2 promote structure of water as a whole by forming hydrogen bonding among water molecules with fewer hydrogen bonding even though they break tetrahedral hydrogen bonded structure of water.
- Water;Raman spectrum;CaCl₂;MgCl₂;Hydrogen bonding
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Raman Spectroscopic Study of Effect of CaCl2 and MgCl2 on Structure of Water

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通讯作者: 陈斌, bchen63@163.com

Raman Spectroscopic Study of Effect of CaCl₂ and MgCl₂ on Structure of Water