The association of anionic surfactants with β -cyclodextrin. An isothermal titration calorimeter study
作者:Wumanjiang Eli、Wenhai Chen、Qunji Xue
DOI:10.1006/jcht.1999.0539
日期:1999.10
The association of a series of anionic surfactants (CnH2n + 1SO4Na, n = 6, 8, 10, 12, 14) withβ -cyclodextrin was studied by means of the isothermal titration calorimeter (i.t.c.) atT = 298.15 K. For these types 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, and
一系列阴离子表面活性剂 (CnH2n + 1SO4Na, n = 6, 8, 10, 12, 14) 与β-环糊精的结合通过等温滴定量热计 (itc) at T = 298.15 K 进行了研究。对于这些类型的夹杂物复合物,结果与 1:1 关联模型非常吻合。关联常数的表观值以及标准摩尔吉布斯能量、焓和熵的变化是为关联过程导出的。结果表明,表面活性剂与β-环糊精的结合具有有利的焓变和有利的熵变特征。结果还表明阴离子表面活性剂的烷基链越长,与β-环糊精的缔合常数越大。