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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

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

Project

<a href="/en/project/GA22-32631S" target="_blank" >GA22-32631S: Anomalous salt extraction from water to polar organic solvents: A novel mechanism of the spontaneous emulsification and practical application</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Journal of Electroanalytical Chemistry

ISSN

1572-6657

e-ISSN

1873-2569

Volume of the periodical

987

Issue of the periodical within the volume

JUN 2025

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

119115

UT code for WoS article

001469666800001

EID of the result in the Scopus database

2-s2.0-105002150628