Vlachy, Nina and Drechsler, Marcus and Touraud, Didier and Kunz, Werner (2009) Anion specificity influencing morphology in catanionic surfactant mixtures with an excess of cationic surfactant. COMPTES RENDUS CHIMIE, 12 (1-2). pp. 30-37. ISSN 1631-0748, 1878-1543
Full text not available from this repository. (Request a copy)Abstract
In previous studies we reported on an ion-specific micelle-to-vesicle transition, when salts are added to a catanionic micellar solution composed of sodium dodecylcarboxylate (sodium laurate, SL) and dodecyltrimethylammonium bromide (DTAB), with an excess of SL. In the present paper, we illustrate the ion specificity, when DTAB is in excess in the same system. In this case, no transition to vesicles is observed, but an elongation of micelles, when salts are added. The counterion binding and increase in aggregate size were monitored by mass spectrometry, dynamic light scattering measurements, and cryo-transmission microscopy. The mechanism is argued by employing the ability of the counterion to dehydrate the surfactant headgroup. This hypothesis was recently confirmed by MD and ab initio calculations and in phase with Collins' concept of matching water affinities. To cite this article: N. Vlachy et al., C R. Chimie 12 (2009). (C) 2008 Academie des sciences. Published by Elsevier Masson SAS. All fights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DYNAMIC LIGHT-SCATTERING; SODIUM DODECYL-SULFATE; HEXADECYLTRIMETHYLAMMONIUM SALT-SOLUTIONS; AQUEOUS MICELLAR-SOLUTIONS; ANGLE NEUTRON-SCATTERING; SPHERE ROD TRANSITION; WATER-INSOLUBLE DYE; CETYLTRIMETHYLAMMONIUM BROMIDE; DODECYLTRIMETHYLAMMONIUM BROMIDE; INTERMICELLAR INTERACTIONS; Hofmeister series; Specific-ion effects; Catanionic mixtures |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > Prof. Dr. Werner Kunz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 12 Oct 2020 06:58 |
| Last Modified: | 12 Oct 2020 06:58 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29697 |
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