Screen-Printed Electrodes Modified with Metal Phthalocyanines: Characterization and Electrocatalysis in Chlorinated Media

Metal phthalocyanines are well-known sensing phases with applications in different scientific fields due to their interesting properties. Detailed characterization by Raman spectroscopy was performed in order to study the shifting of the vibrational bands related to the coordination sphere of each m...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2020-07, Vol.20 (13), p.3702
Main Authors: Antuña-Jiménez, Daniel, Ibáñez, David, González-García, María Begoña, Hernández-Santos, David, Fanjul-Bolado, Pablo
Format: Article
Language:English
Subjects:
Aqueous solutions
Carbon
Chlorine
electrocatalysis
electrochemical detection
Electrodes
Gases
Lasers
Metal phthalocyanines
Optimization
Oxidation
Raman spectroscopy
Saline solutions
screen-printed electrodes
Software
Spectrum analysis
voltammetric sensors
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Summary:Metal phthalocyanines are well-known sensing phases with applications in different scientific fields due to their interesting properties. Detailed characterization by Raman spectroscopy was performed in order to study the shifting of the vibrational bands related to the coordination sphere of each metal phthalocyanine. In this work, a study involving the use of screen-printed electrodes (SPEs) with various metal phthalocyanines to electrochemically detect and quantify chlorine (Cl2) gas is presented. The Cl2 gas was generated in-situ via oxidation of the chloride present in form of aqueous salt solutions. The developed method offers not only the possibility to quantify chlorine, but also to discriminate among several chlorinated species due to the changes observed in the voltammetric profiles associated with the interaction between the specie assayed and the phthalocyanine metallic center. Optimization of detecting parameters was also performed to apply this procedure for the quantification of chlorine generated from commercial chlorine tablets. The development of this proof of concept shows interesting possibilities and easy-to-use applications with novel on metal phthalocyanines based SPE sensors.
ISSN:1424-8220
1424-8220
DOI:10.3390/s20133702