Voltammetric Study of N-Benzoylthiourea and Its N',N'-Disubstituted Derivatives as Possible Electrode Modifiers

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Title:Voltammetric Study of N-Benzoylthiourea and Its N',N'-Disubstituted Derivatives as Possible Electrode Modifiers
Creators:
Lubert, Karl-Heinz
Beyer, Lothar
Guttmann, Markus
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 64, 12, pp. 1937-1952
Uncontrolled Keywords:Redox behavior, Carbon paste electrode, Glassy carbon electrode, Cyclic voltammetry, Thioureas, Thiourea derivatives, Chemical modification, Reductions, Electrochemistry

Abstract

The voltammetric behavior of <i>N</i>-benzoylthiourea (BTU) and some of its <i>N',N'</i>-disubstituted derivatives is studied using glassy carbon and carbon paste electrodes in ethanolic solution. Irreversible reduction of the compounds takes place in a potential range between -0.5 and -1.1 V, where carbon surface groups are reduced as well. The products formed by reductive cleavage of the C-N bond of the amide group are oxidized in the subsequent positive scan at +0.5 V. Irreversible oxidation of the thiocarbonyl group of BTU (or its derivatives) takes place at about +1.0 V followed further by an oxidation of its <i>N',N'</i>-dialkyl and morpholine derivatives at more positive potentials. Oxidation current at +0.8 V is only observed in the case of the <i>N',N'</i>-diphenyl derivative. The oxidation current at +1.0 V depends linearly on the concentration of BTU (or its derivatives) and is suitable for their electroanalytical determination with carbon electrodes. The experimental results are compared with electrochemical behavior of related compounds. Furthermore, the influence of carbon surface states is discussed. It was concluded that <i>N',N'</i>-disubstituted derivatives of the BTU can be employed as modifying agents for carbon electrodes applicable in the potential range from +0.7 to -0.5 V. <p>

Title:Voltammetric Study of N-Benzoylthiourea and Its N',N'-Disubstituted Derivatives as Possible Electrode Modifiers
Creators:
Lubert, Karl-Heinz
Beyer, Lothar
Guttmann, Markus
Uncontrolled Keywords:Redox behavior, Carbon paste electrode, Glassy carbon electrode, Cyclic voltammetry, Thioureas, Thiourea derivatives, Chemical modification, Reductions, Electrochemistry
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:64
Number:12
Page Range:pp. 1937-1952
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19991937UNSPECIFIED
ID Code:1606
Item Type:Article
Deposited On:06 Feb 2009 17:11
Last Modified:06 Feb 2009 16:11

Citation

Lubert, Karl-Heinz; Beyer, Lothar; Guttmann, Markus (1999) Voltammetric Study of N-Benzoylthiourea and Its N',N'-Disubstituted Derivatives as Possible Electrode Modifiers. Collection of Czechoslovak Chemical Communications, 64 (12). pp. 1937-1952. ISSN 0010-0765

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