Closo-dodecaborate-based dianionic surfactants with distorted classical morphology: Synthesis and atypical micellization in water
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10469909" target="_blank" >RIV/00216208:11310/23:10469909 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11110/23:10469909
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_nNNAdOxLN" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_nNNAdOxLN</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jcis.2023.06.013" target="_blank" >10.1016/j.jcis.2023.06.013</a>
Alternative languages
Result language
angličtina
Original language name
Closo-dodecaborate-based dianionic surfactants with distorted classical morphology: Synthesis and atypical micellization in water
Original language description
Hypothesis: To challenge the classical concept of step-like micellization of ionic surfactants with singular critical micelle concentration, novel amphiphilic compounds with bulky dianionic head and the alkoxy tail connected via short linker, which can complex sodium cations, were synthesized in the form of disodium salts.Experiment: The surfactants were synthesized by opening of a dioxanate ring attached to closo-dodecaborate by activated alcohol, which allows for attachment of alkyloxy tails of desired length to boron cluster dianion. The synthesis of the compounds with high cationic purity (sodium salt) is described. Self-assembly of the surfactant compound at air/water interface and in bulk water was studied by tensiometry, light and small angle X-ray scattering, electron microscopy, NMR spectroscopy, MD simulations and by isothermal titration calorimetry, ITC. The peculiarities in the micelle structure and formation were revealed by thermodynamic modelling and MD simulations of the micellization process. Findings: In an atypical process, the surfactants self-assemble in water to form relatively small micelles, where the aggregation number is decreasing with the surfactant concentration. The extensive counterion binding is a key characteristic of the micelles. The analysis strongly indicates complex compensation between the degree of bound sodium ions and the aggregation number. For the first time, a three-step thermodynamic model was used to estimate the thermodynamic parameters associated with micellization process. Diverse micelles differing in size and counterion binding can (co-)exist in the solution over the broad concentration and temperature range. Thus, the concept of step-like micellization was found inappropriate for these types of micelles.
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
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Colloid and Interface Science
ISSN
0021-9797
e-ISSN
1095-7103
Volume of the periodical
648
Issue of the periodical within the volume
October
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
809-819
UT code for WoS article
001054136500001
EID of the result in the Scopus database
2-s2.0-85162126420