物理化学学报 >> 2007, Vol. 23 >> Issue (01): 103-106.doi: 10.3866/PKU.WHXB20070121

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阴离子对水的羟基伸缩振动拉曼光谱的影响

李睿华;蒋展鹏   

  1. 南京大学环境学院环境工程系, 南京 210093; 清华大学环境科学与工程系, 北京 100084
  • 收稿日期:2006-06-09 修回日期:2006-07-12 发布日期:2007-01-08
  • 通讯作者: 李睿华 E-mail:liruihua@nju.edu.cn

Effects of Anions on OH Stretching Raman Spectra of Water

LI Rui-Hua;JIANG Zhan-Peng   

  1. Department of Environmental Engineering, College of Environment, Nanjing University, Nanjing 210093, P. R. China; Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
  • Received:2006-06-09 Revised:2006-07-12 Published:2007-01-08
  • Contact: LI Rui-Hua E-mail:liruihua@nju.edu.cn

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摘要： 通过比较纯水、NaX(X=F, Cl, Br, I)、Na2S、NaOH、NaNO3、Na2CO3、Na2SO4溶液的羟基伸缩振动拉曼光谱, 发现所研究的阴离子对水的结构都有破坏作用. 通过比较阴离子对水的羟基伸缩振动拉曼光谱的影响, 可将所研究的阴离子分为两类, 一类阴离子有F−、OH−、S2−、CO32−, 另一类阴离子有Cl−、Br−、I−、NO3−和SO42−. 它们的主要区别在于对羟基伸缩振动拉曼光谱3600 cm−1、2900−3100 cm−1处影响不同, 产生这些区别的原因在于阴离子与水分子之间氢键的强弱. 阴离子对水的羟基伸缩振动拉曼光谱的影响因素有离子半径、离子电荷和离子结构, 它们的影响程度为离子结构>离子电荷>离子半径.

关键词: 阴离子, 拉曼光谱, 水的结构, 氢键

Abstract: Raman spectra of solutions of NaX (X=F, Cl, Br, I), Na2S, NaOH, NaNO3, Na2CO3, Na2SO4 and water were compared. The results showed that all of the studied anions broke the structure of water. The effects of the studied anions on Raman spectrum of water could be summed up into two kinds. F−, OH−, S2−, CO32− belonged to one kind, and Cl−, Br−, I−, NO3−, and SO42− belonged to the other. The main differences lay on their effects on 3600 cm−1 and 2900−3100 cm−1 of OH stretching Raman spectrum of water. And the reason that conduced to these differences was the intensity of hydrogen bond between anion and water molecule. Parameters of the anion influencing OH stretching Raman spectra of water included ion radius, ion charge and ion structure. The order of their effects on water structure was ion structure>ion charge>ion radius

Key words: Anion, Raman spectrum, Water structure, Hydrogen bond