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Anodic Behaviour of Some Bispyridinium Oximes on a Glassy-Carbon Electrode

Novak, Ivana; Komorsky-Lovrić, Šebojka; Žunec, Suzana; Lucić Vrdoljak, Ana (2013) Anodic Behaviour of Some Bispyridinium Oximes on a Glassy-Carbon Electrode. International Journal of Electrochemical Science, 8 (7). pp. 9818-9834. ISSN 1452-3981

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Abstract

The electrochemical oxidation of selected bispyridinium oximes, including conventional oximes HI-6 [(1-(((4-carbamoylpyridinium-1-yl)methoxy)methyl)-2-((hydroxyimino)-methyl)pyridinium chloride] and TMB-4 [N, N'-(propano)bis(4-hydroxyiminomethyl)pyridinium bromide], as well as a new generation oxime K048 [1-(4-hydroxyiminomethylpyridinium)-4-(4-carbamoylpyridinium) butane dibromide], was studied at a glassy-carbon electrode over a wide range of experimental conditions, using cyclic and square-wave voltammetry. It was observed that in all investigated compounds the oxidation of oxime moiety (the first oxidation peak) occurs. This process is diffusion controlled, pH dependent, and occurs in a complex ECE mechanism. The monoximes HI-6 and K048 exhibited only one anodic peak, while TMB-4 undergoes two consecutive oxidation reactions due to the presence of two oxidizable oxime moieties. The final product of electro-oxidation of oxime moiety, hydroxy-nitroso intermediate, undergoes further oxidation at more positive potential.

Item Type: Article
Uncontrolled Keywords: bispyridinium oximes; HI-6; K048; TMB-4; cyclic voltammetry; square-wave voltammetry; electrochemical oxidation
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division of Materials Chemistry
Projects:
Project titleProject leaderProject codeProject type
Terapijski učinak novosintetiziranih spojeva pri otrovanju organofosfatima-Ana Lucić Vrdoljak022-0222148-2139MZOS
Elektroanalitička istraživanja mikrokristala i tragova otopljenih supstanci-Milivoj Lovrić098-0982904-2907MZOS
Depositing User: Šebojka Komorsky-Lovrić
Date Deposited: 28 Sep 2016 08:48
Last Modified: 28 Sep 2016 08:48
URI: http://fulir.irb.hr/id/eprint/3064

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