Mortara, Laura and Lima, Filipe da Silva and Cuccovia, Iolanda Midea and Nazet, Andreas and Horinek, Dominik and Buchner, Richard and Chaimovich, Hernan (2018) Specific Ion Effects on Zwitterionic Micelles Are Independent of Interfacial Hydration Changes. LANGMUIR, 34 (37). pp. 11049-11057. ISSN 0743-7463,
Full text not available from this repository. (Request a copy)Abstract
Zwitterionic micelles adsorb anions and several techniques were used to determine the specificity of this interaction. Although at a lower intensity, this adsorption can be compared to those observed in cationic micelles, which showed that interfacial dehydration is a fundamental property for the geometry and size of micelles. Because there is no information on the interfacial hydration of zwitterionic micelles, we used dielectric relaxation spectroscopy (DRS) together with molecular dynamics (MD) simulations to evaluate the importance of surface dehydration promoted by the binding of anions at the micellar interface (sodium bromide, sodium methanesulfonate, sodium trifluoroacetate, and sodium triflate) in N-dodecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate (DPS) micelles. Our results, showing good agreement between DRS and MD simulations, strongly suggest that specific ion effects on zwitterionic micelles are unrelated to global changes in the interfacial hydration and depend on specific interactions of the headgroups with selected anions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DIELECTRIC-RELAXATION SPECTROSCOPY; MOLECULAR-DYNAMICS SIMULATIONS; CHAMELEON-LIKE NATURE; AMBER FORCE-FIELD; AQUEOUS-SOLUTION; CATIONIC MICELLES; SULFOBETAINE MICELLES; WATER REORIENTATION; AIR/WATER INTERFACE; TRIFLATE MICELLES; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 Dec 2019 08:14 |
| Last Modified: | 13 Dec 2019 08:14 |
| URI: | https://pred.uni-regensburg.de/id/eprint/13846 |
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