6533b7dcfe1ef96bd1272b79
RESEARCH PRODUCT
A glassy carbon electrode modified by a triply-fused-like Co( ii ) polyporphine and its ability for sulphite oxidation and detection
Sébastien D. RolleCharles H. DevillersHervé GibaultSophie FournierOlivier HeintzDominique Lucassubject
Conductive polymerDetection limitAqueous solutionChemistry[CHIM.ORGA]Chemical Sciences/Organic chemistryGlassy carbon electrodeInorganic chemistry02 engineering and technologyGeneral Chemistry[CHIM.MATE]Chemical Sciences/Material chemistry010402 general chemistry021001 nanoscience & nanotechnologyElectrochemistry01 natural sciencesCatalysis0104 chemical sciencesCatalysis[CHIM.ANAL]Chemical Sciences/Analytical chemistryElectrodeMaterials ChemistryMolecule[CHIM.COOR]Chemical Sciences/Coordination chemistry0210 nano-technologydescription
This article presents a Co(II) polyporphine conductive polymer easily and rapidly obtained (less than 2 h 30 min) on the surface of a glassy carbon electrode from the transformation of an initial Mg(II) porphine solution in a four-step process (including electrochemical and chemical stages). The intimate molecular structure is argued on the basis of the electrochemical response of the modified electrode, as well as its surface characterization. Owing to its apparent stability in water over potential cycling and its high density in active Co(II) centers, the electrosynthesized film shows its ability to catalyze sulphite oxidation in aqueous solutions. The mechanism of this molecular catalysis was assessed through specifically designed voltammetric experiments. The performances of this system as an analytical method for sulphite determination in water were also evaluated (limit of detection and limit of quantification: 0.195 and 0.649 mmol L−1, respectively).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-01-01 |