Enzyme mediated synthesis of polypyrrole in the presence of chondroitin sulfate and redox mediators of natural origin

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Title: Enzyme mediated synthesis of polypyrrole in the presence of chondroitin sulfate and redox mediators of natural origin
Authors: Grijalva-Bustamante, Génesis Adilene | Evans-Villegas, Andrés Gerardo | Castillo-Castro, Teresa del | Castillo-Ortega, María Mónica | Cruz-Silva, Rodolfo | Huerta Arráez, Francisco | Morallon, Emilia
Research Group/s: Electrocatálisis y Electroquímica de Polímeros
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Biocatalytic polymerization | Polypyrrole | Natural redox mediators | Uric acid sensor
Knowledge Area: Química Física
Issue Date: 1-Jun-2016
Publisher: Elsevier
Citation: Materials Science and Engineering C. 2016, 63: 650-656. doi:10.1016/j.msec.2016.03.042
Abstract: Polypyrrole (PPy) was synthesized by enzyme mediated oxidation of pyrrole using naturally occurring compounds as redox mediators. The catalytic mechanism is an enzymatic cascade reaction in which hydrogen peroxide is the oxidizer and soybean peroxidase, in the presence of acetosyringone, syringaldehyde or vanillin, acts as a natural catalysts. The effect of the initial reaction composition on the polymerization yield and electrical conductivity of PPy was analyzed. Morphology of the PPy particles was studied by scanning electron microscopy and transmission electron microscopy whereas the chemical structure was studied by X-ray photoelectron and Fourier transformed infrared spectroscopic techniques. The redox mediators increased the polymerization yield without a significant modification of the electronic structure of PPy. The highest conductivity of PPy was reached when chondroitin sulfate was used simultaneously as dopant and template during pyrrole polymerization. Electroactive properties of PPy obtained from natural precursors were successfully used in the amperometric quantification of uric acid concentrations. PPy increases the amperometric sensitivity of carbon nanotube screen-printed electrodes toward uric acid detection.
Sponsor: This work was supported by the Consejo Nacional de Ciencia y Tecnología (CONACYT), Mexico (Grant Ciencia Básica 2012-N°180280). Financial support from the Spanish Ministerio de Economía y Competitividad and FEDER funds (MAT2013-42007-P) and from the Generalitat Valenciana (PROMETEO2013/038) is also gratefully acknowledged. Génesis Adilene Grijalva Bustamante acknowledges CONACYT for the scholarship during this study.
URI: http://hdl.handle.net/10045/54213
ISSN: 0928-4931 (Print) | 1873-0191 (Online)
DOI: 10.1016/j.msec.2016.03.042
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2016 Elsevier B.V.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.msec.2016.03.042
Appears in Collections:INV - GEPE - Artículos de Revistas

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