Abstract
An electrochemical sensor based on (E)-2-[[(4-hydroxyphenyl)imino]methyl]phenol (anil) was developed for the detection of iodide anions. The complexation ability of the anil with I−, Br−, Cl−, CN−, SCN−,\({\mathrm{NO}}_{3}^{-}\), CH3COO−,\({\mathrm{SO}}_{4}^{2-}\), F−, and S2− was explored by UV–Vis spectroscopy. The results showed that the proposed probe has high sensibility for the detection of I−, with the absorption intensity changing due to the formation of anil–I− complex. The anil and iodide anion bind by a 1:1 complex stoichiometry and the association constant is determined to be 8.5 × 103 M−1. In addition, the sensing film was elaborated by drop coating on a platinum electrode. The electrochemical sensors for the detection of I− were analyzed by DPV. It showed a linear response in the range of 1 × 10–7 to 1 × 10–4 M, with a low detection limit of 4 × 10–8 M. The sensor shows good analytical performance. The developed sensor is suitable for application in water quality monitoring.
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Financial support of this research from the Ministry of Higher Education and Scientific Research of Tunisia.
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Echabaane, M., Moulahi, N., Baouab, M.H.V. et al. Optical, electrochemical, and sensing properties of (E)‐2‐[[(4-hydroxyphenyl)imino]methyl]phenol for the detection of iodide ions. Monatsh Chem 153, 561–567 (2022). https://doi.org/10.1007/s00706-022-02937-5
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DOI: https://doi.org/10.1007/s00706-022-02937-5