Russian Journal of Electrochemistry

, Volume 55, Issue 5, pp 370–380 | Cite as

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

  • M. A. Hafiz Mia
  • Md Abdul MotinEmail author
  • Entazul M. Huque


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.


electro-oxidation L-lysine catechol reaction condition voltammetry controlled potential coulometry 


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Thanks to Ministry of Science and Technology, Government of the People’s Republic of Bangladesh and KUET for providing necessary facilities and financial support to this research work.


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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • M. A. Hafiz Mia
    • 1
  • Md Abdul Motin
    • 1
    Email author
  • Entazul M. Huque
    • 2
  1. 1.Department of ChemistryKhulna University of Engineering and Technology (KUET)KhulnaBangladesh
  2. 2.Department of ChemistryRajshahi UniversityRajshahiBangladesh

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