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Статья
2019

Electrochemical Oxidation of Catechol in the Presence of L-Lysine at Different pH


M. A. Hafiz MiaM. A. Hafiz Mia, Md Abdul MotinMd Abdul Motin, Entazul M. HuqueEntazul M. Huque
Российский электрохимический журнал
https://doi.org/10.1134/S1023193519050070
Abstract / Full Text

The reaction of electrochemically produced o-benzoquinone from oxidation of catechol as Michael acceptor with L-lysine as nucleophiles has been studied in aqueous solution with various pH values, different electrodes and different concentration of L-lysine using cyclic voltammetry, controlled potential coulometry and differential pulse voltammetry. The participation of reaction of o-benzoquinone with L-lysine at higher concentration of nucleophiles in the second scan of potential was observed. The products generated from the reaction are assumed to be 2-amino-6-((3,4-dihydroxyphenyl)amino)hexanoic acid that undergo electron transfer at more negative potentials than the catechol. The effect of pH of catechol in presence of L-lysine was studied by varying pH from 5 to 11. The reaction was strongly influenced by the pH as well as concentration of L-lysine. The reaction was mostly favorable in 2 mM of catechol and 70 mM of L-lysine at pH 7. The behavior of the reaction mechanism was of electron transfer, chemical reaction and electron transfer (ECE) type.

Author information
  • Department of Chemistry, Khulna University of Engineering and Technology (KUET), Khulna, 9203, BangladeshM. A. Hafiz Mia & Md Abdul Motin
  • Department of Chemistry, Rajshahi University, Rajshahi, BangladeshEntazul M. Huque
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