烷基苯磺酸钠胶团的ESR研究

波谱学杂志 ›› 2012, Vol. 29 ›› Issue (3): 388-392.

烷基苯磺酸钠胶团的ESR研究

姜小明^1,2*, 丁宁¹, 赵濉²

1. 贵州大学化学与化工学院，贵阳 550025; 2. 中国科学院理化技术研究所，北京 100190

收稿日期:2011-10-08 修回日期:2011-11-22 出版日期:2012-09-05 发布日期:2012-09-05
基金资助:
国家自然科学基金资助项目(20861003)，贵州省工业攻关资助项目\[黔科合GY字(2010)3014], 贵州省教育厅自然科学研究资助项目\[黔教科（2011）022号], 贵阳市工业振兴科技计划资助项目[筑科合同（2011101）].

An ESR Study on Sodium Alkylbenzensulfonate Micelles

JIANG Xiao-Ming^1,2*, Ding-Ning¹, Zhao-Sui²

1. Department of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China; 
2. Technical Institute of Physics Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Received:2011-10-08 Revised:2011-11-22 Online:2012-09-05 Published:2012-09-05
Supported by:
国家自然科学基金资助项目(20861003)，贵州省工业攻关资助项目\[黔科合GY字(2010)3014], 贵州省教育厅自然科学研究资助项目\[黔教科（2011）022号], 贵阳市工业振兴科技计划资助项目[筑科合同（2011101）].

摘要/Abstract

摘要：

利用ESR测定了自由基探针5-doxyl stearic acid在烷基苯磺酸钠溶液中超精细偶合常数（A_N）和旋转相关时间（τ_R）. 根据A_N随浓度的变化规律测定了表面活性剂的临界胶团浓度（cmc），并与表面张力法的结果作了对比. 通过分析A_N和τR数据，讨论了位于磺酸根邻位的疏水短链的长度变化对胶团微极性和微粘度的影响. 结果表明，当疏水短链的碳原子数增加时，临界胶团浓度降低，胶团微极性增加，胶团微粘度降低.

关键词: 电子自旋共振（ESR）, 临界胶团浓度, 微粘度, 微极性, 烷基苯磺酸钠

Abstract:

The hyperfine splitting constant and the correlation time of 5-doxyl stearic acid in the solution of sodium alkylbenzensulfonates (ABS) were measured by electron paramagnetic resonance (ESR). The critical micelle concentration of ABS was determined and compared with the result derived from surface tension curve. It was found that the micelle microviscosity decreased and the micelle micropolarity increased with the carbon number of the short hydrophobic group at the ortho position of the sulfonic acid group.

Key words: ESR, critical micelle concentration, microviscosity, micropolarity, alkylbenzensulfonate

中图分类号:

O648

姜小明, 丁宁, 赵濉. 烷基苯磺酸钠胶团的ESR研究[J]. 波谱学杂志, 2012, 29(3): 388-392.

JIANG Xiao-Ming, Ding-Ning, Zhao-Sui. An ESR Study on Sodium Alkylbenzensulfonate Micelles[J]. Chinese Journal of Magnetic Resonance, 2012, 29(3): 388-392.

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