Supramolecular Packing Drives Morphological Transitions of Charged Surfactant Micelles.
detergents
dimers
micellles
molecular modeling
self-assembly
Journal
Angewandte Chemie (International ed. in English)
ISSN: 1521-3773
Titre abrégé: Angew Chem Int Ed Engl
Pays: Germany
ID NLM: 0370543
Informations de publication
Date de publication:
12 Oct 2020
12 Oct 2020
Historique:
received:
27
03
2020
revised:
29
05
2020
pubmed:
17
6
2020
medline:
17
6
2020
entrez:
17
6
2020
Statut:
ppublish
Résumé
The shape and size of self-assembled structures upon local organization of their molecular building blocks are hard to predict in the presence of long-range interactions. Combining small-angle X-ray/neutron scattering data, theoretical modelling, and computer simulations, sodium dodecyl sulfate (SDS), over a broad range of concentrations and ionic strengths, was investigated. Computer simulations indicate that micellar shape changes are associated with different binding of the counterions. By employing a toy model based on point charges on a surface, and comparing it to experiments and simulations, it is demonstrated that the observed morphological changes are caused by symmetry breaking of the irreducible building blocks, with the formation of transient surfactant dimers mediated by the counterions that promote the stabilization of cylindrical instead of spherical micelles. The present model is of general applicability and can be extended to all systems controlled by the presence of mobile charges.
Identifiants
pubmed: 32543728
doi: 10.1002/anie.202004522
pmc: PMC7589243
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
18591-18598Subventions
Organisme : Research Council of Norway
ID : 262695
Organisme : Deutsche Forschungsgemeinschaft
ID : TRR 146 (project number 233630050)
Organisme : H2020 Marie Skłodowska-Curie Actions
ID : HYPERBIO - No 70449
Organisme : Universitetet i Oslo
Informations de copyright
© 2020 The Authors. Published by Wiley-VCH GmbH.
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