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Gold electrodes functionalized by methyl-naphthyl substituted cyclam films for the detection of metal ions

Abstract : A methyl-naphthyl functionalized cyclam (1,4,8,11-tetraazacyclotetradecane) (N-MNC) was deposited on gold electrodes and characterized by means of infrared spectroscopy in ATR mode, wettability, morphology and an electrochemical study. The proton conductivity of the N-MNC film was brought out, for the first time, by electrochemical impedance spectroscopy (EIS) and by cyclic voltammetry (CV); the anodic peaks located at 0.15 V and at 0.45-0.50 V, due to proton exchange, were shown to increase when electrolyte pH decreases. The chemical sensor based on an n-MNC functionalized gold electrode was studied in the presence of divalent (Cu2+, Ni2+, Zn2+) and trivalent (Fe3+) metallic ions. The influence of the metallic ion concentration on the ion-exchange resistance of the film and on the proton-exchange anodic peak was quantified. The highest sensitivity was obtained for Ni2+ and Fe3+, with a detection limit of 10(-8) M.
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https://hal.archives-ouvertes.fr/hal-01186741
Contributor : Agnès Bussy <>
Submitted on : Tuesday, August 25, 2015 - 3:48:30 PM
Last modification on : Friday, April 17, 2020 - 5:34:01 PM

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Wahid Ben Mefteh, Hassen Touzi, Yves Chevalier, François Bessueille, Rafik Kalfat, et al.. Gold electrodes functionalized by methyl-naphthyl substituted cyclam films for the detection of metal ions. Sensors and Actuators B: Chemical, Elsevier, 2015, 213, pp.334-342. ⟨10.1016/j.snb.2015.02.109⟩. ⟨hal-01186741⟩

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