Electrochemically Prepared Polypyrrole‐2‐Carboxylic Acid Films: Synthesis Protocols and Studies on Biosensors. Issue 3 (22nd February 2013)

• Record Type: Journal Article
• Authors: Foschini, M.; Marletta, A.; Faria, R. C.; Leonard, D.; Bessueille, F.; Jaffrezic‐Renault, N.; Gonçalves, D.
• Is Part Of: Electroanalysis. Volume 25:Issue 3(2013:Mar.)
• Page Start: 741
• Page End: 749
• Publication Date: 2013-02-22
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201200574
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The process for obtaining polypyrrole‐2‐carboxylic acid (PPY‐2‐COOH) films in acetonitrile was investigated using cyclic voltammetry, electrochemical quartz crystal microgravimetry (EQCM), and infrared spectroscopy (FTIR). Different potential ranges were applied during cyclic voltammetry experiments with the aim of obtaining films without and with the presence of controlled amounts of water added in acetonitrile. The FTIR spectra of the films have evidenced that cations and anions from the electrolyte solution were incorporated into the PPY‐2‐COOH structure, with a preferential adsorption of cations. After chemically immobilizing polyphenoloxidase (tyrosinase, PPO), PPY‐2‐COOH/PPO films were build for amperometric detection of catechol, establishing a linear limit of concentrations ranging from 5.0×10⁻⁴ to 2.5×10⁻² mol L⁻¹.</p> </abstract>