Tuning the Surface Activity and Micellization of closo-Dodecaborate-Based Dianionic Surfactants via Linker and Counterion Selection
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10506619" target="_blank" >RIV/00216208:11310/25:10506619 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=3_tjrqc5tf" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=3_tjrqc5tf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.langmuir.5c04598" target="_blank" >10.1021/acs.langmuir.5c04598</a>
Alternative languages
Result language
angličtina
Original language name
Tuning the Surface Activity and Micellization of closo-Dodecaborate-Based Dianionic Surfactants via Linker and Counterion Selection
Original language description
To understand the impact of alkaline counterions on the self-assembly of atypical dianionic surfactants, we synthesized a series of novel amphiphilic compounds featuring a bulky dianionic head based on closo-dodecaborate and a hydrophobic alkoxy tail connected via short linkers of different complexation ability toward alkaline cations. The synthetic strategy relied on the opening of cyclic oxonium derivatives by activated alcohol, enabling the attachment of hydrophobic chains to the boron cluster framework. The synthesis of novel surfactants with high cationic purity free from contaminating ions or additional inorganic salts is described. Self-assembly of the dodecaborate-based surfactants at the air-water interface and in aqueous solutions was investigated using tensiometry, various NMR spectroscopy techniques, dynamic light scattering, and all-atom MD simulations. Interestingly, despite their dianionic heads, the surfactants form compact monolayers in cases in which efficient binding of counterions to surfactant dianions occurs. MD simulations suggested relatively small surfactant micelles above the critical micelle concentration, which was confirmed by light scattering analysis. There is evidence that their aggregation number and morphology are strongly dependent on counterion immobilization. The mobility of counterions was observed directly by (7)Li, (23)Na, (39)K, and (133)Cs NMR spectroscopy, which allowed us to understand the binding abilities of linkers and dianionic heads toward counterions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GF21-20008K" target="_blank" >GF21-20008K: Metallacarboranes as unique platform for fabrication of functional nano-assemblies and polymer materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Langmuir : the ACS journal of surfaces and colloids
ISSN
0743-7463
e-ISSN
1520-5827
Volume of the periodical
41
Issue of the periodical within the volume
48
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
32650-32661
UT code for WoS article
001626029300001
EID of the result in the Scopus database
2-s2.0-105024253698