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Closo-dodecaborate-based dianionic surfactants with distorted classical morphology : synthesis and atypical micellization in water
ID
Hleli, Belhssen
(
Avtor
),
ID
Medoš, Žiga
(
Avtor
),
ID
Ogrin, Peter
(
Avtor
),
ID
Tošner, Zdeněk
(
Avtor
),
ID
Kereïche, Sami
(
Avtor
),
ID
Gradzielski, Michael
(
Avtor
),
ID
Urbič, Tomaž
(
Avtor
),
ID
Bešter-Rogač, Marija
(
Avtor
),
ID
Matějíček, Pavel
(
Avtor
)
PDF - Predstavitvena datoteka,
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(4,56 MB)
MD5: 667FAF9559B544A945C6804D14379181
URL - Izvorni URL, za dostop obiščite
https://www.sciencedirect.com/science/article/pii/S0021979723010330
Galerija slik
Izvleček
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.
Jezik:
Angleški jezik
Ključne besede:
dodecaborate
,
surfactants
,
self-assembly
,
micelles
,
calorimetry
,
simulations
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2023
Št. strani:
Str. 809-819
Številčenje:
Vol. 648
PID:
20.500.12556/RUL-147049
UDK:
544.27
ISSN pri članku:
0021-9797
DOI:
10.1016/j.jcis.2023.06.013
COBISS.SI-ID:
156408323
Datum objave v RUL:
22.06.2023
Število ogledov:
1311
Število prenosov:
58
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Journal of colloid and interface science
Skrajšan naslov:
J. colloid interface sci.
Založnik:
Elsevier
ISSN:
0021-9797
COBISS.SI-ID:
5255941
Licence
Licenca:
CC BY-NC 4.0, Creative Commons Priznanje avtorstva-Nekomercialno 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by-nc/4.0/deed.sl
Opis:
Licenca Creative Commons, ki prepoveduje komercialno uporabo, vendar uporabniki ne rabijo upravljati materialnih avtorskih pravic na izpeljanih delih z enako licenco.
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
dodekaborat
,
surfaktanti
,
samourejanje
,
micele
,
kalorimetrija
,
simulacije
Projekti
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
Czech Science Foundation, LA CEUS
Številka projekta:
21-20008K
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
N1-0186
Naslov:
Metalcarborani kot edinstveno izhodišče za pripravo funkcionalnih nanostrukturiranih in polimernih materialov
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
CIISB, Instruct-CZ Centre, CMS-Biocev
Naslov:
Biophysical techniques, Crystallization, Diffraction, Structural mass spectrometry
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
MEYS CR
Številka projekta:
LM2018127
Naslov:
CIISB, Instruct-CZ Centre
Financer:
Drugi - Drug financer ali več financerjev
Številka projekta:
CZ.02.1.01/0.0/0.0/18_046/ 0015974
Naslov:
CIISB, Instruct-CZ Centre
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