Electrochemical Behavior of Quinoxalin-2-one Derivatives at Mercury Electrodes and Its Analytical Use
Joint Authors
Sedonikova, Jana
Bartak, Petr
Zimpl, Milan
Kotoucek, Milan
Navratil, Tomas
Skopalova, Jana
Jirovsky, David
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-04-30
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Medicine
Information Technology and Computer Science
Abstract EN
Derivatives of quinoxalin-2-one are interesting compounds with potential pharmacological activity.
From this point of view, understanding of their electrochemical behavior is of great importance.
In the present paper, a mechanism of electrochemical reduction of quinoxalin-2-one derivatives at mercury dropping electrode was proposed.
Pyrazine ring was found to be the main electroactive center undergoing a pH-dependent two-electron reduction process.
The molecule protonization of nitrogen in the position 4 precedes the electron acceptance forming a semiquinone radical intermediate which is relatively stable in acidic solutions.
Its further reduction is manifested by separated current signal.
A positive mesomeric effect of the nonprotonized amino group in the position 7 of the derivative III accelerates the semiquinone reduction yielding a single current wave.
The suggested reaction mechanism was verified by means of direct current polarography, differential pulse, cyclic and elimination voltammetry, and coulometry with subsequent GC/MS analysis.
The understanding of the mechanism was applied in developing of analytical method for the determination of the studied compounds.
American Psychological Association (APA)
Zimpl, Milan& Skopalova, Jana& Jirovsky, David& Bartak, Petr& Navratil, Tomas& Sedonikova, Jana…[et al.]. 2012. Electrochemical Behavior of Quinoxalin-2-one Derivatives at Mercury Electrodes and Its Analytical Use. The Scientific World Journal،Vol. 2012, no. 2012, pp.1-12.
https://search.emarefa.net/detail/BIM-469877
Modern Language Association (MLA)
Zimpl, Milan…[et al.]. Electrochemical Behavior of Quinoxalin-2-one Derivatives at Mercury Electrodes and Its Analytical Use. The Scientific World Journal No. 2012 (2012), pp.1-12.
https://search.emarefa.net/detail/BIM-469877
American Medical Association (AMA)
Zimpl, Milan& Skopalova, Jana& Jirovsky, David& Bartak, Petr& Navratil, Tomas& Sedonikova, Jana…[et al.]. Electrochemical Behavior of Quinoxalin-2-one Derivatives at Mercury Electrodes and Its Analytical Use. The Scientific World Journal. 2012. Vol. 2012, no. 2012, pp.1-12.
https://search.emarefa.net/detail/BIM-469877
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-469877