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Electrosynthesized nanostructured molecularly imprinted polymer for detecting diclofenac molecule

Nguyen, D.-H.-N. and Le, Q.-H. and Nguyen, T.-L. and Dinh, V.-T. and Nguyen, H.-N. and Pham, H.-N. and Nguyen, T.-A. and Nguyen, L.-L. and Dinh, T.-M.-T. and Nguyen, V.-Q. (2022) Electrosynthesized nanostructured molecularly imprinted polymer for detecting diclofenac molecule. Journal of Electroanalytical Chemistry, 921. ISSN 15726657

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Abstract

This work describes the preparation and application of micropatterned molecular imprinting in conductive polymer film for the detection of diclofenac molecules. A fast and cost-effective technique for generating nanostructured polymer on glassy carbon electrode (GCE) by combining nanosphere lithography (NSL) and electrochemical polymerization is reported. Firstly, GCE is modified by a close-packed monolayer of polystyrene (PS) spheres sized 500 nm in diameter, which subsequently serves as a template for the electrochemical deposition of poly(3,4-ethylene dioxythiophene) (PEDOT) accompanied by diclofenac (DCF). The functional monomers of 3,4-ethylene dioxythiophene (EDOT) were electropolymerized in the presence of sodium diclofenac (DCF-Na) as a target molecule to prepare a molecularly imprinted polymer (MIP) electrode. After dissolving PS and DCF-templated molecules simultaneously in tetrahydrofuran (THF) solvent, the micropatterned structure of PEDOT is generated on the GCE surface. This as-prepared MIP surface is applied to test the recognition of DCF molecules in phosphate-buffered saline (PBS) solution. Good linearity of peak current recorded by differential pulse voltammograms (DVP) after exposure to different DCF concentrations was obtained with a limit of detection (LOD) of 77.5 nM. The sensitivity of the as-prepared MIP electrode is 5 times larger than that of the control electrode made by non-molecular imprinted polymer (NIP). It opens a pathway to significantly improve the sensitivity and the quality of conventional electrochemical sensors for the detection of Diclofenac. © 2022 Elsevier B.V.

Item Type: Article
Divisions: Faculties > Faculty of Physical and Chemical Engineering
Identification Number: 10.1016/j.jelechem.2022.116709
Uncontrolled Keywords: Cost effectiveness; Electrochemical deposition; Electrochemical sensors; Electropolymerization; Film preparation; Glass membrane electrodes; Nanospheres; Organic solvents; Polymer films; Reduction; Semiconducting films, Conductive polymer films; Diclofenac; Glassy carbon electrodes; Micropatterned; Molecular imprinted polymers; Molecular imprinting; Molecularly Imprinted Polymer; Nano Sphere Lithography; Nano-structured; Polymer electrodes, Molecules
URI: http://eprints.lqdtu.edu.vn/id/eprint/10524

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