物理化学学报 >> 1999, Vol. 15 >> Issue (12): 1115-1118.doi: 10.3866/PKU.WHXB19991212

研究简报 上一篇    下一篇

阴离子表面活性剂和β-环糊精包结作用

吾满江, 艾力, 陈文海, 陈炜, 薛群基   

  1. 中国科学院新疆化学研究所,乌鲁木齐 830011|中国科学院兰州化学物理研究所,兰州 730000
  • 收稿日期:1999-01-11 修回日期:1999-04-13 发布日期:1999-12-15
  • 通讯作者: 吾满江 艾力

The Association of Anionic Surfactants with β-cyclodextrin

Wu  Man-Jiang, Ai  Li, Chen Wen-Hai, Chen Wei, Xue Qun-Ji   

  1. Xinjiang Institute of Chemistry,Chinese Academy of Sciences,Urumqi 830011|Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000
  • Received:1999-01-11 Revised:1999-04-13 Published:1999-12-15

关键词: β-环糊精, 阴离子表面活性剂, 包结物, 微量热法, 热力学参数

Abstract:

The association of a series of anionic surfactants (C n H 2 n +1 SO 3Na, n =5,8,10,12,14) with β-cyclodextrin was studied by means of the isothermal titration calorimeter(ITC) at 298.15 K. For these type of inclusion complexes, the results agreed well with a 1:1 association model. Apparent values for the association constants, and changes in the standard molar Gibbs energies, enthalpies, entropies ,were derived for the association process. The results indicated that the association of surfactants with β-cyclodextrin are favorable by both enthalpy and entropy changes. The results also indicated that -Δ GΘincrease steadily with an increasing of alkyl chain length of the surfactants. The results also demonstrated that the longer chain tail of surfactant, the greater the association constant with β-cyclodextrin .

Key words: β--cyclodextrin, Anionic surfactants, Inclusion complexes, Isothermal titration calorimeler, Thermodynamic parameters