Artículos de revistas
Association of anions to cationic micelles
Fecha
1980Registro en:
Journal of Physical Chemistry, Volumen 84, Issue 3, 2018, Pages 272-275
00223654
10.1021/j100440a010
Autor
Bartet, Daniel
Gamboa, Consuelo
Sepúlveda, Luis
Institución
Resumen
The relative association degrees of different anions to micelles of hexadecyltrimethylammonium bromide (CTA) were measured by spectrophotometrically determining the amounts of p-toluenesulfonate (TOS) or benzenesulfonate (BS) anions desorbed from the micelles by addition of increasing amounts of NaNO3, NaBr, NaCl, NaOH, NaF, NaOAc, Na2SO4, Na2HPO4, Na2CO3, and Na2B4O7. A simple ion-exchange model was used for interpreting the results in a quantitative way and values for the ion-exchange constants were calculated. These values are discussed in terms of the hard and soft acid-base principle. © 1980 American Chemical Society.