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• W2000757767 abstract "Modification of a gold electrode has been achieved by immobilizing a bis(2,2′-bipyridyl)copper(II) complex in a self-assembled monolayer (SAM) of 3-mercaptopropionic acid. The electrostatic interaction of the negatively charged SAM with a di-positive copper complex allowed the attachment. The modified electrode exhibited excellent redox behavior. The dependence of the modified electrode response was investigated in terms of pH, supporting electrolyte and ionic strength. Moreover, it showed good electrocatalytic activity for ascorbic acid oxidation, allowing convenient quantification at levels down to 8.1 × 10−8 mol l−1. The [Cu(bipy)2]/SAM modified electrode under optimized operational conditions (PIPES buffer 0.01 mol l−1 at pH 6.8 and 200 mV vs. SCE) presented a linear response range between 1.0 µmol l−1 and 100.0 µmol l−1 for ascorbic acid. This modified electrode also presented an excellent repeatability, showing a relative standard deviation of 2.1% for a series of 12 successive measurements of a 5.0 µmol l−1 ascorbic acid solution. Furthermore, the electroactivity was maintained over a long period (e.g., 92% after 100 determinations)." @default.
• W2000757767 created "2016-06-24" @default.
• W2000757767 creator A5030404585 @default.
• W2000757767 creator A5071571442 @default.
• W2000757767 date "2002-01-01" @default.
• W2000757767 modified "2023-10-03" @default.
• W2000757767 title "Electrochemical behavior of the bis(2,2′-bipyridyl)copper(<scp>ii</scp>) complex immobilized on a self-assembled monolayer modified electrode for<scp>l</scp>-ascorbic acid detection" @default.
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• W2000757767 doi "https://doi.org/10.1039/b205814f" @default.
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