Effect of water solubility in organic solvents on the standard Gibbs energy of ion transfer across a water/organic solvent interface

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00570455" target="_blank" >RIV/61388955:_____/23:00570455 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0341746" target="_blank" >https://hdl.handle.net/11104/0341746</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2023.142222" target="_blank" >10.1016/j.electacta.2023.142222</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of water solubility in organic solvents on the standard Gibbs energy of ion transfer across a water/organic solvent interface

Popis výsledku v původním jazyce

Ion transfer voltammetry is used to study the transfer of alkali metal and proton cations and the Cl- anion from the aqueous solution of MCl (M+ = H+, Li+, Na+, K+, Rb+, Cs+) to the solution of bis(triphenylphosphor-anylidene)ammonium tetrakis(pentafluorophenyl)borate in alpha,alpha.alpha-trifluorotoluene (TFT) or 1,2-dichloroethane (DCE). The scale of the applied potentials is converted to the scale of the Galvani potential differences on the basis of the voltammetric measurements of the standard ion transfer potential for the tetraethylammonium (TEA+) ion used as a reference ion in situ. The interfacial tension measurements at the water/TFT interface yield the zero-charge potential difference, which is close to the expected zero value. The standard Gibbs energies of ion transfer Delta owG0i are evaluated from the voltammetric data on considering both the effect of the association between the transferred ion and the counter-ion of the organic solvent phase, and the effect of the ion migration in the aqueous phase. The values of Delta owG0i for the ion transfer to TFT are found to be considerably higher than those obtained for the ion transfer to DCE. This difference is proposed to be related to the significantly lower solubility of water in TFT, possibly requiring the removal of the ion hydration shell in the course of the ion transfer from water to TFT. Such conclusion is supported by the calculations of Delta owG0i by using an advanced Born-type model of ion solvation.

Název v anglickém jazyce

Effect of water solubility in organic solvents on the standard Gibbs energy of ion transfer across a water/organic solvent interface

Popis výsledku anglicky

Ion transfer voltammetry is used to study the transfer of alkali metal and proton cations and the Cl- anion from the aqueous solution of MCl (M+ = H+, Li+, Na+, K+, Rb+, Cs+) to the solution of bis(triphenylphosphor-anylidene)ammonium tetrakis(pentafluorophenyl)borate in alpha,alpha.alpha-trifluorotoluene (TFT) or 1,2-dichloroethane (DCE). The scale of the applied potentials is converted to the scale of the Galvani potential differences on the basis of the voltammetric measurements of the standard ion transfer potential for the tetraethylammonium (TEA+) ion used as a reference ion in situ. The interfacial tension measurements at the water/TFT interface yield the zero-charge potential difference, which is close to the expected zero value. The standard Gibbs energies of ion transfer Delta owG0i are evaluated from the voltammetric data on considering both the effect of the association between the transferred ion and the counter-ion of the organic solvent phase, and the effect of the ion migration in the aqueous phase. The values of Delta owG0i for the ion transfer to TFT are found to be considerably higher than those obtained for the ion transfer to DCE. This difference is proposed to be related to the significantly lower solubility of water in TFT, possibly requiring the removal of the ion hydration shell in the course of the ion transfer from water to TFT. Such conclusion is supported by the calculations of Delta owG0i by using an advanced Born-type model of ion solvation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/GA22-32631S" target="_blank" >GA22-32631S: Anomální extrakce solí z vody do organického rozpouštědla: Nový mechanismus spontánní emulzifikace a praktická aplikace</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Electrochimica acta

ISSN

0013-4686

e-ISSN

1873-3859

Svazek periodika

449

Číslo periodika v rámci svazku

MAY 2023

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

142222

Kód UT WoS článku

000955300400001

EID výsledku v databázi Scopus

2-s2.0-85150270464