Selective electrochemical recognition of ions in solution and at self-assembled monolayers

Quinone-functionalized calix[4]arenes having carboxylic acid groups or thiol groups were prepared and their spontaneous adsorption on silver and gold surfaces, respectively, was studied. Since the cavity-like structure of calixarenes was immobilized on the noble metal electrodes, they exhibited a se...

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Bibliographic Details
Published in:Microchemical journal 2001-03, Vol.68 (2), p.109-113
Main Authors: Park, Jongseo, Kang, Sun Kil, Chung, Taek Dong, Chang, Suk-Kyu, Kim, Hasuck
Format: Article
Language:English
Subjects:
Analytical chemistry
Calixarenes
Chemistry
Determination of calcium ion
Electrochemical recognition
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
General, instrumentation
Ion selective electrodes
Self-assembled monolayers
Voltammetry
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Summary:Quinone-functionalized calix[4]arenes having carboxylic acid groups or thiol groups were prepared and their spontaneous adsorption on silver and gold surfaces, respectively, was studied. Since the cavity-like structure of calixarenes was immobilized on the noble metal electrodes, they exhibited a selective affinity towards specific hard metal ions in aqueous media. Voltammetric and spectroscopic studies showed the well-ordered deposition of organic receptors and entrapment of metal ions. It also was found that the repeated capture and removal of metal ions reversibly with chelating agents such as ethylenediaminetetraacetic acid (EDTA) was possible. This is the first example, to our knowledge, of voltammetric detection of hard metal ions in aqueous media using a chemically modified electrode with redox-active macrocyclic receptors.
ISSN:0026-265X
1095-9149
DOI:10.1016/S0026-265X(00)00136-3