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化学学报
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化学学报 ›› 2006, Vol. 64 ›› Issue (23): 2357-2364. 上一篇    下一篇

研究论文

乙腈-水-高氯酸钠体系弱作用力二维相关红外光谱研究

赖祖亮, 武培怡*   

  1. (复旦大学高分子科学系 聚合物分子工程教育部重点实验室 上海 200433)
  • 投稿日期:2006-04-11 修回日期:2006-08-06 发布日期:2006-12-14
  • 通讯作者: 武培怡

Probing Weak Interactions of Acetonitrile-Water-Sodium Perchlorate Mixtures Using Two Dimensional (2D) Correlation Infrared Spectroscopy

LAI Zu-Liang; WU Pei-Yi*   

  1. (Department of Macromolecule Science and Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Fudan University, Shanghai 200433)
  • Received:2006-04-11 Revised:2006-08-06 Published:2006-12-14
  • Contact: WU Pei-Yi

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1023

被引次数

28

运用衰减全反射二维相关傅立叶变换红外光谱(ATR-2D-FTIR), 以浓度为外扰因素, 对乙腈(CH3CN)-水(H2O)-高氯酸钠(NaClO4)体系存在的一些弱作用力进行了研究. 结果表明体系中乙腈的CH3与水分子OH存在相互作用. 无机盐高氯酸钠的加入破坏了水分子的氢键结构, 阴阳离子分别与水发生相互作用. Na＋与氢键缔合水分子发生作用, 而非自由水分子. 无机盐的加入对体系中微观结构变化产生较大影响.

关键词: 乙腈-水-高氯酸钠溶液, ATR, 二维相关, 微观不均一性

A study of the weak interactions of acetonitrile-water-sodium perchlorate mixtures has been performed using attenuated total reflection two-dimensional FTIR spectroscopy (ATR-2D-FTIR). The results indicate that CH3 and OH in the mixtures have some weak interactions with each other. The inorganic salts, sodium perchlorate, disbond hydrogen-bonded structure of water. Some interactions have been found between ions of sodium perchlorate and water molecules. Cations of Na＋ are combined with hydrogen- bonded water. Inorganic salts play an important role in changing the microstructure of the mixtures.

Key words: acetonitrile-water-sodium perchlorate mixture, ATR, two-dimensional correlation, microheterogeneity