| Full text | |
| Author(s): |
Mortara, Laura
[1]
;
Lima, Filipe da Silva
[2]
;
Cuccovia, Iolanda Midea
[3]
;
Nazet, Andreas
[4]
;
Horinek, Dominik
[4]
;
Buchner, Richard
[4]
;
Chaimovich, Hernan
[3]
Total Authors: 7
|
| Affiliation: | [1] Univ Sao Paulo, Inst Quim, Dept Quim, BR-05508000 Sao Paulo - Brazil
[2] Univ Fed Pernambuco, Ctr Ciencias Exatas & Nat, Dept Quim Fundamental, BR-50740540 Recife, PE - Brazil
[3] Univ Sao Paulo, Inst Quim, Dept Bioquim, BR-05500800 Sao Paulo - Brazil
[4] Univ Regensburg, Inst Phys & Theoret Chem, D-93040 Regensburg - Germany
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Langmuir; v. 34, n. 37, p. 11049-11057, SEP 18 2018. |
| Web of Science Citations: | 1 |
| 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. (AU) | |
| FAPESP's process: | 13/08166-5 - Interfacial chemistry: drugs, peptides and ezymes interactions with membrane models |
| Grantee: | Iolanda Midea Cuccovia |
| Support Opportunities: | Research Projects - Thematic Grants |