高等学校化学学报

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (10): 2042.

• 研究论文 • 上一篇    下一篇

丁二酸钠气溶胶液滴吸湿性的分子谱学研究

王枫, 张丽娜   

  1. 河南理工大学物理化学学院化学系, 焦作 454000
  • 收稿日期:2010-04-16 出版日期:2010-10-10 发布日期:2010-10-10
  • 通讯作者: 王枫, 男, 博士, 讲师, 主要从事气溶胶研究. E-mail: smallpeak@hpu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20903036)资助.

Molecular Spectral Investigations on the Hygroscopicity of Aerosols of Sodium Succinate

WANG Feng*, ZHANG Li-Na   

  1. Chemistry Department, School of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China
  • Received:2010-04-16 Online:2010-10-10 Published:2010-10-10
  • Contact: WANG Feng. E-mail: smallpeak@hpu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20903036)资助.

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摘要： 采用共聚焦拉曼光谱和傅里叶变换红外-衰减全反射(FTIR-ATR)技术, 研究了丁二酸钠气溶胶液滴的风化和潮解过程. 研究发现, 随着水质摩尔比的降低, 1420 cm-1处νs(COO-)的半峰宽由35 cm-1增加至42 cm-1, 表明过饱和丁二酸钠液滴内部Na+与丁二酸根存在弱相互作用; 过饱和丁二酸钠液滴风化形成亚稳态无水晶体, 而不是形成热力学更稳定的六水合晶体.

关键词: 丁二酸钠, 吸湿性, 共聚焦拉曼, 傅里叶变换红外-衰减全反射

Abstract: The efflorescence and deliquescence processes of sodium succinate aerosol droplets were investigated with combination of confocal Raman spectral and FTIR-ATR techniques. It was concluded that the full width at half maximum(FWHM) of νs(COO-) band of sodium succinate droplet at 1420 cm-1 increased from 35 cm-1 to 42 cm-1 with decreasing the molar ratio of water to solute(WSR), indicating the weak interaction between Na+ and succinate dianions; the sodium succinate droplet crystallized to form metastable anhydrous particles rather than thermodynamically stable hexahydrated ones.

Key words: Sodium succinate, Hygroscopicity, Confocal Raman, FTIR-ATR

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