Complexation thermodynamics of a -cyclodextrin with ionic surfactants in water

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F17%3A43913243" target="_blank" >RIV/60461373:22340/17:43913243 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0021979717306215?via%3Dihub" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0021979717306215?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jcis.2017.05.093" target="_blank" >10.1016/j.jcis.2017.05.093</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Complexation thermodynamics of a -cyclodextrin with ionic surfactants in water

Popis výsledku v původním jazyce

The interaction of a -cyclodextrin ( a -CD) with ten ionic surfactants (S) in water was systematically exam- ined using isothermal titration calorimetry. The S comprised cationic and anionic head groups while the hydrocarbon alkyl chain length varied from eight to fourteen carbon atoms. The heat data were measured atfive temperatures ranging from283.15 Kto318.15 Kand weretreated simultaneouslyallowing theesti- mationof athermodynamicallyconsistenttemperature dependence oftheequilibrium constant,aswellas the enthalpy and heat capacity for the sequential formation of the [ a -CD?S] and the [ a -CD 2 ?S] inclusion complexes. All attempts to fit the data assuming that only [ a -CD?S] complexes are present failed. It was found that the thermodynamic footprint of the [ a -CD?S] complexes does not depend importantly on the head group, while the formation and stabilization of the [ a -CD 2 ?S] complexes is strongly influenced by the chemical nature of the polar head group. Several contributions to the thermodynamic parameters arediscussed indetail.Amongthestudied surfactants, thedecyl- andoctylsulfates were identified asthose with a predominant content of [ a -CD 2 ?S] complexes and hence they are promising candidates to form vis- coelastic films at the liquid/air interface, as it was found previously for the dodecylsulfate surfactant.

Název v anglickém jazyce

Complexation thermodynamics of a -cyclodextrin with ionic surfactants in water

Popis výsledku anglicky

The interaction of a -cyclodextrin ( a -CD) with ten ionic surfactants (S) in water was systematically exam- ined using isothermal titration calorimetry. The S comprised cationic and anionic head groups while the hydrocarbon alkyl chain length varied from eight to fourteen carbon atoms. The heat data were measured atfive temperatures ranging from283.15 Kto318.15 Kand weretreated simultaneouslyallowing theesti- mationof athermodynamicallyconsistenttemperature dependence oftheequilibrium constant,aswellas the enthalpy and heat capacity for the sequential formation of the [ a -CD?S] and the [ a -CD 2 ?S] inclusion complexes. All attempts to fit the data assuming that only [ a -CD?S] complexes are present failed. It was found that the thermodynamic footprint of the [ a -CD?S] complexes does not depend importantly on the head group, while the formation and stabilization of the [ a -CD 2 ?S] complexes is strongly influenced by the chemical nature of the polar head group. Several contributions to the thermodynamic parameters arediscussed indetail.Amongthestudied surfactants, thedecyl- andoctylsulfates were identified asthose with a predominant content of [ a -CD 2 ?S] complexes and hence they are promising candidates to form vis- coelastic films at the liquid/air interface, as it was found previously for the dodecylsulfate surfactant.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Colloid and Interface Science

ISSN

0021-9797

e-ISSN

—

Svazek periodika

505

Číslo periodika v rámci svazku

November 2017

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

445-453

Kód UT WoS článku

000410464100048

EID výsledku v databázi Scopus

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