Effect of 14-s-14 dicationic surfactants on the solubility and acid–base properties of thymolphthalein in water

The solubilization effect of 14- s -14 series dicationic surfactants is quantified via spectrophotometry using a thymolphthalein hydrophobic indicator. It is shown that the solubilization capacity of the studied micellar solutions with respect to the neutral form of thymolphthalein increases along w...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2016-02, Vol.90 (2), p.339-343
Main Authors: Yackevich, E. I., Mirgorodskaya, A. B., Lukashenko, S. S., Sadykova, A. I., Zakharova, L. Ya
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Physical Chemistry
Physical Chemistry of Solutions
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Summary:The solubilization effect of 14- s -14 series dicationic surfactants is quantified via spectrophotometry using a thymolphthalein hydrophobic indicator. It is shown that the solubilization capacity of the studied micellar solutions with respect to the neutral form of thymolphthalein increases along with the length of the spacer moiety and grows by as much as five times upon transitioning from 14-2-14 to 14-6-14. It is concluded that the solubilization of thymolphthalein is accompanied by a shift in the acid-base equilibria in which this compound participates, as is reflected in the drop of its p K a value and the shift of the region of color change.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024416020370