| Texto completo | |
| Autor(es): |
Mortara, Laura
;
Cortez, Matheus P.
;
Lacerda, Caroline D.
;
Carretero, Gustavo P. B.
;
Schreier, Shirley
;
Chaimovich, Hernan
;
Lima, Filipe S.
;
Cuccovia, Iolanda M.
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Langmuir; v. 41, n. 14, p. 8-pg., 2025-03-31. |
| Resumo | |
We used isothermal titration calorimetry to investigate the influence of hydrotropic anions on the micellization of the zwitterionic surfactants N-dodecylphosphocholine (DPC) and N-dodecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate (DPS), as well as the effect of these anions on the micellar interface. Our results showed an increased enthalpic contribution to the Gibbs energy for micellization when the hydrotropic anions contained CF3 or C6H5 hydrophobic groups. We found that the critical micelle concentration of DPS was more sensitive to the effects of the anions than that of DPC, likely because the positive charge of DPS is located closer to the micellar core. Overall, the magnitudes of the anion effects on the micellar properties of DPC and DPS were relatively minor compared with those observed in cationic micelles. These findings offer valuable insights into the role of dipole orientation and charge distribution in the interactions between zwitterionic surfactants and anions as well as the effects of hydrotropic anions on these systems. (AU) | |
| Processo FAPESP: | 14/50983-3 - INCT 2014: fluidos complexos |
| Beneficiário: | Antonio Martins Figueiredo Neto |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 19/03023-8 - Como adentram a membrana os peptídeos penetradores de células? |
| Beneficiário: | Peter Park |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 18/19838-8 - Forças determinantes da estrutura e estabilidade de agregados de surfactantes sintéticos: seletividade na associação de íons a interfaces e formação de vesículas |
| Beneficiário: | Laura Mortara |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 19/26557-8 - Análise coarse-graining da interação entre vesículas lipídicas e peptídeos antimicrobianos e penetradores de células |
| Beneficiário: | Peter Park |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto |