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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (14): 1758-1762. 上一篇    下一篇

研究简报

傅立叶变换红外光谱对琥珀酸-2-乙基己基磺酸钠非极性溶液中 反胶束结构的研究

郭宜鲁 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:2007-10-07 修回日期:2008-02-14 发布日期:2008-07-28
  • 通讯作者: 武培怡

FT-IR Spectroscopic Study of the Structure of Sodium Bis(2-ethylhexyl) Sulfosuccinate Reversed Micelles in Apolar Solution

GUO, Yi-Lu WU, Pei-Yi*   

  1. (The Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai 200433)
  • Received:2007-10-07 Revised:2008-02-14 Published:2008-07-28
  • Contact: WU, Pei-Yi

PDF

636

被引次数

11 | 2

利用衰减全反射傅立叶变换红外光谱(ATR-FTIR), 对琥珀酸-2-乙基己基磺酸钠(AOT)的反胶束结构进行了研究. 通过对红外光谱进行二维相关分析, 可以分辨出AOT分子在CCl4溶液中具有旁式和反式两种结构, 随着温度的升高, 旁式结构向反式结构转变, 反胶束体系能量降低, 38 ℃时, 反式结构所占比例达到最大值, 此时反胶束具有最大尺寸, 并处于最稳定的能量状态. 随着温度的进一步升高, 反式结构开始向旁式结构转变, 反胶束尺寸变小, 直至最后反胶束被破坏.

关键词: 琥珀酸-2-乙基己基磺酸钠, 反胶束, 衰减全反射(ATR), 二维相关光谱

The state of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) reversed micelles has been investigated by Fourier transform infrared spectroscopy with an attenuated total reflection (ATR) accessory. 2D correlation spectroscopy revealed that a process of AOT molecules transforming from trans conformation into gauche conformation exists during heating. The quantitative analysis of the C＝O stretching vibration band shows that before 38 ℃, the gauche conformation transformed into the trans conformation, and after 38 ℃, the trans conformation transformed into the gauche conformation instead. The reversed micelles have the maximum size and lowest energy at the temperature of 38 ℃.

Key words: sodium bis(2-ethylhexyl) sulfosuccinate, reversed micelle, attenuated total reflection (ATR), 2D correlation spectroscopy