E-viri
Recenzirano
Odprti dostop
-
Mao, Canwei; Robinson, Kye J.; Yuan, Dajing; Bakker, Eric
Sensors and actuators. B, Chemical, 05/2022, Letnik: 358Journal Article
In ion sensing applications, selective ion-receptor complexation is the molecular basis for endowing the sensing material with selectivity. In this work, thin polymeric membrane-based ion transfer voltammetry is used to investigate ion-receptor complexation, using a range of electrically neutral ionophores and surfactants as examples. Previous studies lacked a convincing approach to eliminate the influence from transducing layer, resulting in deviations of the observed binding constants compared to potentiometric methods. A recently developed method allows for subtracting the potential changes of the transducing layer, thereby overcoming this challenge. Using this approach, a range of ionophores are assessed. Valinomycin for the detection of potassium gave a logarithmic complex formation constant in the membrane of 9.69 ± 0.25 with a 1:1 stoichiometry. Lithium ionophore VI for lithium gave a logarithmic stability constant of 5.97 ± 0.06 with 1:2 complexes; while sodium ionophore X for sodium (7.57 ± 0.03, 1:1) and calcium ionophore IV for calcium (21.57 ± 0.25, 1:3) were also characterized, in addition to their complexes with potential interfering ions. The complex formation of three surfactants with potassium are also explored in membranes containing valinomycin, with Brij-35 (4.88 ± 0.08, 1:1), Triton X-100 (5.63 ± 0.10, 1:1), F-127 (4.63 ± 0.49, 1:1). Limitations of the approach are discussed, which includes the need for electrochemical reversibility and a sufficiently high lipophilicity to adequately retain the components in the membrane Display omitted •Thin film ion transfer voltammetry is analyzed by an equilibrium approach.•Formation constants and stoichiometries of ion-ionophore are evaluated.•The approach gives sensor selectivity coefficients as a function of ion-exchanger concentration.•Binding properties of four ionophores and three nonionic surfactants are described.
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Vnos na polico
Trajna povezava
- URL:
Faktor vpliva
Dostop do baze podatkov JCR je dovoljen samo uporabnikom iz Slovenije. Vaš trenutni IP-naslov ni na seznamu dovoljenih za dostop, zato je potrebna avtentikacija z ustreznim računom AAI.
Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Baze podatkov, v katerih je revija indeksirana
Ime baze podatkov | Področje | Leto |
---|
Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
---|
Vir: Osebne bibliografije
in: SICRIS
To gradivo vam je dostopno v celotnem besedilu. Če kljub temu želite naročiti gradivo, kliknite gumb Nadaljuj.