Total Description of Intrinsic Amphiphile Aggregation: Calorimetry Study and Molecular Probing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10386108" target="_blank" >RIV/00216208:11310/18:10386108 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389013:_____/18:00497397

Výsledek na webu

<a href="https://doi.org/10.1021/acs.langmuir.8b03462" target="_blank" >https://doi.org/10.1021/acs.langmuir.8b03462</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.langmuir.8b03462" target="_blank" >10.1021/acs.langmuir.8b03462</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Total Description of Intrinsic Amphiphile Aggregation: Calorimetry Study and Molecular Probing

Popis výsledku v původním jazyce

Isothermal titration calorimetry (ITC) is an apt tool for a total thermodynamic description of self-assembly of atypical amphiphiles such as anionic boron cluster compounds (COSAN) in water. Global fitting of ITC enthalpograms reveals remarkable features that differentiate COSAN from classical amphiphiles: (i) strong enthalpy and weak entropy contribution to the free energy of aggregation, (ii) low degree of counterion binding, and (iii) very low aggregation number, leading to deviations from the ideal closed association model. The counterion condensation obtained from the thermodynamic model was compared with the results of 7Li DOSY NMR of Li[COSAN] micelles, which allows direct tracking of Li cations. The basic thermodynamic study of COSAN alkaline salt aggregation was complemented by NMR and ITC experiments in dilute Li/NaCl and acetonitrile aqueous solutions of COSAN. The strong affinity of acetonitrile molecules to COSAN clusters was microscopically investigated by all-atomic molecular dynamics simulations. The impact of ionic strength on COSAN self-assembling was comparable whereas even a small amount of acetonitrile cosolvent has a pronounced nonclassical character demonstrates that large self-assembling changes are triggered by traces of organic solvents. to the behavior of classical amphiphiles, of COSAN aggregation. It demonstrates that large self-assembling changes are triggered by traces of organic solvents.

Název v anglickém jazyce

Total Description of Intrinsic Amphiphile Aggregation: Calorimetry Study and Molecular Probing

Popis výsledku anglicky

Isothermal titration calorimetry (ITC) is an apt tool for a total thermodynamic description of self-assembly of atypical amphiphiles such as anionic boron cluster compounds (COSAN) in water. Global fitting of ITC enthalpograms reveals remarkable features that differentiate COSAN from classical amphiphiles: (i) strong enthalpy and weak entropy contribution to the free energy of aggregation, (ii) low degree of counterion binding, and (iii) very low aggregation number, leading to deviations from the ideal closed association model. The counterion condensation obtained from the thermodynamic model was compared with the results of 7Li DOSY NMR of Li[COSAN] micelles, which allows direct tracking of Li cations. The basic thermodynamic study of COSAN alkaline salt aggregation was complemented by NMR and ITC experiments in dilute Li/NaCl and acetonitrile aqueous solutions of COSAN. The strong affinity of acetonitrile molecules to COSAN clusters was microscopically investigated by all-atomic molecular dynamics simulations. The impact of ionic strength on COSAN self-assembling was comparable whereas even a small amount of acetonitrile cosolvent has a pronounced nonclassical character demonstrates that large self-assembling changes are triggered by traces of organic solvents. to the behavior of classical amphiphiles, of COSAN aggregation. It demonstrates that large self-assembling changes are triggered by traces of organic solvents.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA17-00648S" target="_blank" >GA17-00648S: Chaotrop, hydrotrop nebo surfaktant? Aniontové klastrové sloučeniny bóru ve vodě a v komplexech s polymery</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Langmuir: the ACS journal of surfaces and colloids

ISSN

0743-7463

e-ISSN

—

Svazek periodika

34

Číslo periodika v rámci svazku

47

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

14448-14457

Kód UT WoS článku

000451789300037

EID výsledku v databázi Scopus

2-s2.0-85056887024