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Information Journal Paper

Title

Electro-oxidation of Catechol in the presence of L-Glutamine at Different pH and Concentrations

Pages

  597-613

Abstract

 The Electro-oxidation of Catechol in presence of L-Glutamine has been investigated in aqueous solution with various pH values, different electrodes and different concentration of L-Glutamine by using Cyclic Voltammetry, Differential Pulse Voltammetry and Controlled potential coulometry. Electrochemically generated o-benzoquinone (Michael acceptor) from oxidation of Catechol reacts with lower concentration of L-Glutamine as nucleophiles in the second scan of potential. The products obtained from the reaction are assumed to be 2-amino-5-((3, 4-dihydroxoyphenyl)amino)-5-oxopentanoic acid that undergo electron transfer at more negative potentials than the Catechol. The effect of pH of Catechol in presence of L-Glutamine has been studied by varying pH from 5 to 11. The slope of the plots of anodic peak current, Ep against pH of CatechoL-Glutamine adduct is 25. 6 mV, indicates that the oxidation proceeded via the 2e− /2H+ processes. The concentration effect of L-Glutamine with the fixed concentration of Catechol (2 mM) was measured from 10 mM to 100 mM. The reaction was strongly influenced by the pH as well as concentration of L-Glutamine and electrode materials. The reaction is mostly favorable in 50 mM of L-Glutamine and 2 mM of Catechol at pH 7. The behavior of the reaction is diffusion controlled followed by ECE mechanism.

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    • Cite

    APA: Copy

    Hafiz Mia, m.a., Motin, m.a., Huque, E.M., Nazim Uddin, M., Dhar, p.k., & Hashem, m.a.. (2017). Electro-oxidation of Catechol in the presence of L-Glutamine at Different pH and Concentrations. ANALYTICAL & BIOANALYTICAL ELECTROCHEMISTRY, 9(5), 597-613. SID. https://sid.ir/paper/346539/en

    Vancouver: Copy

    Hafiz Mia m.a., Motin m.a., Huque E.M., Nazim Uddin M., Dhar p.k., Hashem m.a.. Electro-oxidation of Catechol in the presence of L-Glutamine at Different pH and Concentrations. ANALYTICAL & BIOANALYTICAL ELECTROCHEMISTRY[Internet]. 2017;9(5):597-613. Available from: https://sid.ir/paper/346539/en

    IEEE: Copy

    m.a. Hafiz Mia, m.a. Motin, E.M. Huque, M. Nazim Uddin, p.k. Dhar, and m.a. Hashem, “Electro-oxidation of Catechol in the presence of L-Glutamine at Different pH and Concentrations,” ANALYTICAL & BIOANALYTICAL ELECTROCHEMISTRY, vol. 9, no. 5, pp. 597–613, 2017, [Online]. Available: https://sid.ir/paper/346539/en

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