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Title: | Design of Nanostructured Hybrid Electrodes Based on a Liquid Crystalline Zn(II) Coordination Complex-Carbon Nanotubes Composition for the Specific Electrochemical Sensing of Uric Acid | Authors: | Negrea, Sorina Claudia Andelescu, Adelina Ilies, Sorina Cretu, Carmen Cseh, Liliana Rastei, Mircea Donnio, Bertrand Szerb, Elisabeta Manea, Florica |
Affiliations: | National Research and Development Institute for Industrial Ecology, ECOIND “Coriolan Dragulescu” Institute of Chemistry Timisoara of Romanian Academy “Coriolan Dragulescu” Institute of Chemistry Timisoara of Romanian Academy “Coriolan Dragulescu” Institute of Chemistry Timisoara of Romanian Academy “Coriolan Dragulescu” Institute of Chemistry Timisoara of Romanian Academy Institute de Physique et Chimie des Matériaux de Strasbourg Institute de Physique et Chimie des Matériaux de Strasbourg “Coriolan Dragulescu” Institute of Chemistry Timisoara of Romanian Academy Politehnica University of Timisoara |
Keywords: | Zn(II);Metallomesogen;Nanocomposite paste electrode;Carbon nanotubes;Sensor;Uric acid;Cyclic voltammetry | Issue Date: | Nov-2022 | Publisher: | MDPI | Abstract: | A metallomesogen based on a Zn(II) coordination complex was employed as a precursor to obtaining complex matrix nanoplatforms for the fabrication of a high-performance electrochemical hybrid sensor. Three representative paste electrodes, which differ by the weight ratio between Zn(II) metallomesogen and carbon nanotubes (CNT), i.e., PE_01, PE_02 and PE_03, were obtained by mixing the materials in different amounts. The composition with the largest amount of CNT with respect to Zn complex, i.e., PE_03, gives the best electrochemical signal for uric acid detection by cyclic voltammetry in an alkaline medium. The amphiphilic structure of the Zn(II) coordination complex likely induces a regular separation between the metal centers favoring the redox system through their reduction, followed by stripping, and is characterized by enhanced electrocatalytic activity towards uric acid oxidation. The comparative detection of uric acid between the PE_03 paste electrode and the commercial zinc electrode demonstrated the former's superiority and its great potential for developing advanced electrochemical detection of uric acid. Advanced electrochemical techniques, such as differential-pulsed voltammetry (DPV) and square-wave voltammetry (SWV), allowed for the highly sensitive detection of uric acid in aqueous alkaline solutions. In addition, a good and fast amperometric signal for uric acid detection was achieved by multiple-pulsed amperometry, which was validated by urine analysis. |
Description: | Nanomaterials, vol. 12, 2022, 4215, https://doi.org/10.3390/nano12234215 |
URI: | http://hdl.handle.net/123456789/1969 |
Appears in Collections: | Articles |
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nanomaterials-12-04215.pdf | Article | 1.79 MB | Adobe PDF | View/Open |
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