Solvent effect on crown ether complexation of Na+, Cs+ and Sr2+ions investigated by ion transfer voltammetry at a polarized water/organic solvent interface

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F25%3A00618962" target="_blank" >RIV/61388955:_____/25:00618962 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1572665725001894?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1572665725001894?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jelechem.2025.119115" target="_blank" >10.1016/j.jelechem.2025.119115</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Solvent effect on crown ether complexation of Na+, Cs+ and Sr2+ions investigated by ion transfer voltammetry at a polarized water/organic solvent interface

Popis výsledku v původním jazyce

Ion transfer voltammetry of background electrolytes is used to complete the list of the values of the standard Gibbs energies of transfer of the Na+, Cs+ and Sr2+ cations and the Cl− anion from water to benzonitrile (BN), nitrobenzene (NB), 1,2-dichloroethane (1,2-DCE) and α,α,α-trifluorotoluene (TFT), and the stability constants of the 1:1 or 1:2 crown ether complexes of the studied cations with dibenzo-18-crown-6 (B218C6) in the solvent listed. The results agree well with the available literature data or fit in the correlations previously reported. A strong solvent effect on the stability constant is observed, which is proposed to be associated with the solubility of water in the particular solvent, in contrast to current explanations referring to the donor number or the dielectric permittivity of the solvent, or the transfer Gibbs energy of the ion. Standard Gibbs energies of transfer of the B218C6 complexes from water to BN, NB, 1,2-DCE or TFT are evaluated with the help of a thermodynamic cycle, and compared with the transfer Gibbs energies of the 18C6 complexes determined by the present voltammetric measurements. Remarkable differences of about 20 kJ mol−1 between the transfer Gibbs energies for the B218C6 and 18C6 complexes, which are probably connected with the presence of two aromatic rings on B218C6 macrocycle, are surprisingly not very sensitive to the nature of the ion or the solvent.

Název v anglickém jazyce

Solvent effect on crown ether complexation of Na+, Cs+ and Sr2+ions investigated by ion transfer voltammetry at a polarized water/organic solvent interface

Popis výsledku anglicky

Ion transfer voltammetry of background electrolytes is used to complete the list of the values of the standard Gibbs energies of transfer of the Na+, Cs+ and Sr2+ cations and the Cl− anion from water to benzonitrile (BN), nitrobenzene (NB), 1,2-dichloroethane (1,2-DCE) and α,α,α-trifluorotoluene (TFT), and the stability constants of the 1:1 or 1:2 crown ether complexes of the studied cations with dibenzo-18-crown-6 (B218C6) in the solvent listed. The results agree well with the available literature data or fit in the correlations previously reported. A strong solvent effect on the stability constant is observed, which is proposed to be associated with the solubility of water in the particular solvent, in contrast to current explanations referring to the donor number or the dielectric permittivity of the solvent, or the transfer Gibbs energy of the ion. Standard Gibbs energies of transfer of the B218C6 complexes from water to BN, NB, 1,2-DCE or TFT are evaluated with the help of a thermodynamic cycle, and compared with the transfer Gibbs energies of the 18C6 complexes determined by the present voltammetric measurements. Remarkable differences of about 20 kJ mol−1 between the transfer Gibbs energies for the B218C6 and 18C6 complexes, which are probably connected with the presence of two aromatic rings on B218C6 macrocycle, are surprisingly not very sensitive to the nature of the ion or the solvent.

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

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Electroanalytical Chemistry

ISSN

1572-6657

e-ISSN

1873-2569

Svazek periodika

987

Číslo periodika v rámci svazku

JUN 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

119115

Kód UT WoS článku

001469666800001

EID výsledku v databázi Scopus

2-s2.0-105002150628