常见氯盐溶液中阳离子对水分子氢键影响的拉曼光谱研究

doi:10.3964/j.issn.1000-0593(2009)10-2694-05

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Abstract In order to understand the effects of the common cations in geofluids on the structure of water, the present paper systematically studied the Raman spectra of NaCl—H₂O, CaCl₂—H₂O, MgCl₂—H₂O, CuCl₂—H₂O, ZnCl₂—H₂O and FeCl₃—H₂O solutions by two methods. (1) The frequency shifts of the peak maximum around 3 400 cm^-1 in O—H stretching Raman spectra of water reveal the destruction effects of these cations on the structure of water: Ca²⁺＞Mg²⁺＞Na^＋, Fe³⁺＞Zn²⁺＞Cu²⁺;(2) Comparing the intensities of the shoulder peak around 3 250 cm^-1 in the O—H stretching Raman spectra of water: ①all salts concerned destruct the structure of water;②with respect to the same chloride, the destruction extent of hydrogen-bond increases with concentration increasing;③comparing different chloride solutions at the same concentration, the destruction effects of catnions on the structure of water decrease in the sequences Ca²⁺＞Mg²⁺＞Na^＋ and Fe³⁺＞Zn²⁺＞Cu²⁺. ④A hydrogen bond-affected mechanism combining cation destruction with complex compound production is supposed for the first time, and is used to explain the effects of the canions on the structure of water: CaCl₂＞MgCl₂＞FeCl₃＞NaCl＞ZnCl₂＞CuCl₂.

Key words：Cations;Raman spectrum;Water structure;Hydrogen bond

Received: 2009-02-05 Accepted: 2009-05-08

ZTFLH:	O657.3
	O641

Corresponding Authors: YANG Dan E-mail: yangd_2004@yahoo.com.cn

Cite this article:

YANG Dan,XU Wen-yi. Effects of Cations in Chlorine Salt Solution on O—H Stretching Raman Spectra of Water [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(10): 2694-2698.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2009)10-2694-05 OR https://www.gpxygpfx.com/EN/Y2009/V29/I10/2694