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Electrochemical bond cleavage in pesticide ioxynil. Kinetic analysis by voltammetry and impedance spectroscopy
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SYSNO ASEP 0484250 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Electrochemical bond cleavage in pesticide ioxynil. Kinetic analysis by voltammetry and impedance spectroscopy Author(s) Sokolová, R. (CZ)
Giannarelli, S. (IT)
Fanelli, N. (IT)
Pospíšil, Lubomír (UOCHB-X) RID, ORCIDSource Title Bulgarian Chemical Communications. - : Bulgarska Akademiya na Naukite - ISSN 0324-1130
Roč. 49, SI C (2017), s. 134-138Number of pages 5 s. Language eng - English Country BG - Bulgaria Keywords electrochemical impedance spectroscopy ; rate constant ; self-protonation ; faradaic phase angle ; halogen cleavage ; EC processes fitting Subject RIV CG - Electrochemistry OECD category Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) Institutional support UOCHB-X - RVO:61388963 UT WOS 000418299200015 Annotation We cleavage of carbon-halogen bond is a common process in electrochemistry of halogenated aromatic compounds. We describe such a cleavage for the reduction of pesticide ioxynil, 4-hydroxy-3,5-diiodobenzonitrile. The reaction mechanism is complicated by the presence of two iodine substituents and by self-protonation equilibrium. We compare three methods for the determination of the rate-determining step. The electrochemical impedance spectroscopy is rarely used for the determination of coupled fast chemical reactions of organic compounds. Our procedure involves simulation of cyclic voltammograms, search for parameters of Gerischer impedance and simulation of the faradaic phase angle as a function of the applied frequency. The last procedure is considerably more sensitive for the detection of chemical reaction compared to fitting the entire electrode impedance spectrum. Workplace Institute of Organic Chemistry and Biochemistry Contact asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434 Year of Publishing 2018
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