物理化学学报 >> 1999, Vol. 15 >> Issue (03): 216-221.doi: 10.3866/PKU.WHXB19990305

研究论文 上一篇    下一篇

醇对水中DDAHPS分子聚集行为的影响

沈强, 李干佐, 黄延章, 叶建平   

  1. 山东大学国家教委胶体与界面化学开放实验室,济南 250100|中国科学院渗流流体力学所,廊坊 065007|中国科学院感光化学研究所,光化学开放实验室,北京 100101
  • 收稿日期:1998-06-04 修回日期:1998-08-30 发布日期:1999-03-15
  • 通讯作者: 李干佐

The Influence of Alcohol on the Aggregation Behavior of DDAHPS Molecules in Water

Shen Qiang, Li Gan-Zuo, Huang Yan-Zhang, Ye Jian-Ping   

  1. Key laboratory for the Colloid and Interface Chemistry of Education Commission,Shandong University,Jinan 250100|Institute of Porous Flow and Fluid Mechanics,Chinese Academy of Science,Langfang 065007|Laboratory of Photochemistry,Institute of Photographic Chemistry,Chinese Academy of Science,Beijing 100101
  • Received:1998-06-04 Revised:1998-08-30 Published:1999-03-15
  • Contact: Li Gan-Zuo

摘要:

分别用稳态荧光猝灭技术和时间分辨荧光方法研究醇对两性表面活性剂 (十二烷基羟基磺化甜菜碱, DDAHPS)在水中聚集行为的影响. 结果表明:在 4.00× 1 0 - 2 mol•L- 1DDAHPS水溶液中 ,随着正丁醇浓度的逐渐增大 ,表面活性剂的聚集数 (N)逐渐降低 .恒定醇的浓度为 2 .1 4× 1 0 - 2mol•L- 1时 ,醇碳链越长 ,N值越大 .与无醇体系相比 ,正丙醇和正丁醇使N值变小 ,正戊醇、正己醇和正庚醇使N值变大 .本文同时还测定了醇对微环境的极性 ,芘的荧光寿命及胶束内芘的激基缔合物形成效率的影响 .

关键词: 稳态荧光猝灭, 时间分辨荧光, 聚集行为, 十二烷基羟基磺化甜菜碱(DDAHPS)

Abstract:

The influence of alcohol on the aggregation behavior of the zwitterionic surfactant (dodecyldimethylammonium hydroxyl propanesulfonate, DDAHPS) molecules in water has been investigated by the steady state fluorescence quenching technique and the time resolved fluorescence method. The results show that the aggregation number of surfactant ( N ) decreases with the increasing addition of n butanol in 4.0×10 -2 mol•L -1 DDAHPS aqueous solution. Keeping the concentration of alcohol constant(ie. 2.14×10 -2 mol•L -1 ),the longer of the carbon chain of alcohol, the larger of the N value. The addition of n propanol and n butanol decrease the N value, while the n pentanol, n hexanol and n heptanol increase the N value. We also measured the effect of alcohol on the microenvoirnment polarity, pyrene fluorescence lifetime and efficiency of intramicellar excimer formation by pyrene.

Key words: Steady-state fluorescence quenching, Time-resolved fluorescence, Aggregation behavior, Dodecyldimethylammonium hydroxyl propane sulfonate(DDAHPS)