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

作者：Ben Mefteh Wahid; Touzi Hassen; Chevalier Yves; Bessueille Francois; Kalfat Rafik; Renault Nicole Jaffrezic^*

来源：Sensors and Actuators B: Chemical , 2015, 213: 334-342.

DOI：10.1016/j.snb.2015.02.109

• Methyl-naphthyl-cyclam film
• Proton conductivity
• Electrochemical impedance spectroscopy
• Cyclic voltammetry
• Metallic ions

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.

• 出版日期2015-7-5