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Cyclic Voltammetric and Quantum Chemical Studies of a Poly(methionine) Modified Carbon Paste Electrode for Simultaneous Detection of Dopamine and Uric Acid

1
Laboratory of Advanced Materials Chemistry, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
3
Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen 518055, China
4
College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
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Departamento de Ingeniería de Proyectos, Centro Universitario de Ciencias Exactas e Ingenierías, Blvd. Marcelino García Barragán 1421, Guadalajara Jal. C.P. 44430, México
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Department of Chemistry, Tsinghua University, Beijing 100084, China
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Faculty of sciences of Tunis, El Manar University, Tunis 2092, Tunisia
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Faculty of Electrical and Electronics Engineering, Vietnamese-German University, Le Lai Street, Hoa Phu Ward, Thu Dau Mot City, Vietnam
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Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, 19 Nguyen Huu Tho, Ho Chi Minh City, Vietnam
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Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Shankaraghatta, Shimoga, Karnataka 577451, India
*
Authors to whom correspondence should be addressed.
Chemosensors 2019, 7(2), 24; https://doi.org/10.3390/chemosensors7020024
Received: 26 March 2019 / Revised: 30 April 2019 / Accepted: 2 May 2019 / Published: 7 May 2019
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PDF [4142 KB, uploaded 7 May 2019]
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Abstract

Fabrication of biocompatible electrodes for the investigation of catecholamines is a known challenge. In this work, methionine was chosen as a modifier for fabrication of a biocompatible carbon paste electrode by electropolymerization, through cyclic voltammetry. The electrochemical behavior of the poly(methionine) modified carbon paste electrode was characterized by cyclic voltammetry for simultaneous determination of dopamine (DA) and uric acid (UA) in a phosphate-buffered solution at pH 7.0. In the absence of an amino acid methionine layer, the bare carbon paste electrode exhibits rather poor voltammetric signals in DA and UA in the binary mixture, with oxidation potentials of DA and UA overlapping with each other. The poly(methionine) modified carbon paste electrode exhibits good catalytic activity with noticeably different oxidation potentials of DA and UA. The experimental results closely agree with the theoretical prediction based on a Fukui function complementary to the simulated electrostatic potential maps. View Full-Text
Keywords: poly(methionine); dopamine; cyclic voltammetry; fukui functions; electrostatic potential poly(methionine); dopamine; cyclic voltammetry; fukui functions; electrostatic potential
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Chandrashekar, B.N.; Lv, W.; Kudur Jayaprakash, G.; Harrath, K.; Liu, L.W.; Kumara Swamy, B.E. Cyclic Voltammetric and Quantum Chemical Studies of a Poly(methionine) Modified Carbon Paste Electrode for Simultaneous Detection of Dopamine and Uric Acid. Chemosensors 2019, 7, 24.

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