Facilitated cation transfer at a three-phase junction and its applicability for ionophore evaluation
PBN-AR
Instytucja
Instytut Chemii Fizycznej Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Electrochimica Acta
ISSN
0013-4686
EISSN
Wydawca
PERGAMON-ELSEVIER SCIENCE LTD
DOI
URL
Rok publikacji
2019
Numer zeszytu
Strony od-do
326-333
Numer tomu
307
Link do pełnego tekstu
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Streszczenia
Język
en
Treść
Although many redox probes have been used for anion transfer studies in three-phase electrode setups, only a few molecules have been applied for cation transfer. In this work we show that the fullerene C-60 is an efficient redox system for this application. We performed ionophore assisted ion-transfer studies in a droplet system, a disposable setup with a cylindrical electrode, as well as a novel paper-based device. The disposable setup is easy to assemble and thanks to the cylindrical electrode creates a more stable and reproducible phase boundary than the standard droplet setup. With this new setup we were able to measure both assisted and unassisted cation-transfer at the three-phase boundary. Additionally, the proposed system was applied to compare the performances of three popular potassium ionophores: Valinomycin, dibenzo-18-crown-6 ether (DB18C6) and Potassium lonophore III (BME-44). Here, ionophores, normally applied in ion-selective electrodes (ISE), can be easily evaluated and compared without the influence of other components of the ISE membrane such as plasticizers or lipophilic salts. Three-phase ion-transfer voltammetry is a convenient mean to assess the effect of each ionophore on both the selectivity and Gibbs energy of transfer. (C) 2019 Elsevier Ltd. All rights reserved.
Cechy publikacji
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:912485
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