Electrochemical behavior of polycrystalline gold electrode modified by thiolated calix[4]arene and undecanethiol
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10378560" target="_blank" >RIV/00216208:11310/18:10378560 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/61388955:_____/18:00490131
Výsledek na webu
<a href="https://doi.org/10.1016/j.jelechem.2018.01.055" target="_blank" >https://doi.org/10.1016/j.jelechem.2018.01.055</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jelechem.2018.01.055" target="_blank" >10.1016/j.jelechem.2018.01.055</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Electrochemical behavior of polycrystalline gold electrode modified by thiolated calix[4]arene and undecanethiol
Popis výsledku v původním jazyce
The electrochemical behavior of polycrystalline gold electrode (PAuE) modified by self-assembled monolayers (SAMs) of thiolated calix[4]arene (C4A) and undecanethiol (C11) was investigated by voltammetric methods and electrochemical impedance spectroscopy. Coverage of the thiol SAMs and their stability was tested. The C11 layer is very stable; the desorption peak was recorded only in basic solutions of pH 12 and higher (at -1.30 V vs. Ag vertical bar AgCl (3 mol L-1 KCl)). The position of the C4A desorption peak is more pH dependent and it was recorded at -1.08 V at pH 13. Molecular coverage for C4A and C11 SAMs modified PAuE is 364 +/- 52.9 mu C cm(-2) and 137 +/- 20.0 mu C cm(-2) respectively. The properties of the PAuE modified by C11 and/or C4A were investigated using the model compounds hydroquinone, ferrocene and potassium ferrocyanide. It is assumed that the oxidation of the hydroquinone cannot be realized inside the C4A cavity because the hydroquinone molecule is too big to enter the cavity. Similar behavior was observed using potassium ferrocyanide. In contrast, cyclic voltammograms of ferrocene oxidation were only negligibly affected by the electrode modification. Moreover, capacitance measurements proved accumulation of ferrocenium ions at the C4A modified electrode.
Název v anglickém jazyce
Electrochemical behavior of polycrystalline gold electrode modified by thiolated calix[4]arene and undecanethiol
Popis výsledku anglicky
The electrochemical behavior of polycrystalline gold electrode (PAuE) modified by self-assembled monolayers (SAMs) of thiolated calix[4]arene (C4A) and undecanethiol (C11) was investigated by voltammetric methods and electrochemical impedance spectroscopy. Coverage of the thiol SAMs and their stability was tested. The C11 layer is very stable; the desorption peak was recorded only in basic solutions of pH 12 and higher (at -1.30 V vs. Ag vertical bar AgCl (3 mol L-1 KCl)). The position of the C4A desorption peak is more pH dependent and it was recorded at -1.08 V at pH 13. Molecular coverage for C4A and C11 SAMs modified PAuE is 364 +/- 52.9 mu C cm(-2) and 137 +/- 20.0 mu C cm(-2) respectively. The properties of the PAuE modified by C11 and/or C4A were investigated using the model compounds hydroquinone, ferrocene and potassium ferrocyanide. It is assumed that the oxidation of the hydroquinone cannot be realized inside the C4A cavity because the hydroquinone molecule is too big to enter the cavity. Similar behavior was observed using potassium ferrocyanide. In contrast, cyclic voltammograms of ferrocene oxidation were only negligibly affected by the electrode modification. Moreover, capacitance measurements proved accumulation of ferrocenium ions at the C4A modified electrode.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10403 - Physical chemistry
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Electroanalytical Chemistry
ISSN
1572-6657
e-ISSN
—
Svazek periodika
821
Číslo periodika v rámci svazku
July
Stát vydavatele periodika
CH - Švýcarská konfederace
Počet stran výsledku
7
Strana od-do
60-66
Kód UT WoS článku
000437818600010
EID výsledku v databázi Scopus
2-s2.0-85041517012