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Application of Manganese (II) Phthalocyanine Synthesized in Situ in the SiO2/SnO2 Mixed Oxide Matrix for Determination of Dissolved Oxygen by Electrochemical Techniques

Application of Manganese (II) Phthalocyanine Synthesized in Situ in the SiO2/SnO2 Mixed Oxide Matrix for Determination of Dissolved Oxygen by Electrochemical Techniques

Lucas S S Santos, Richard Landers, Yoshitaka Gushikem

Talanta. 2011 Aug 15;85(2):1213-6.

PMID: 21726761

Abstract:

This work describes the in situ immobilization of Mn(II) phthalocyanine (MnPc) in a porous SiO(2)/SnO(2) mixed oxide matrix obtained by the sol gel processing method. The chemically modified matrix SiO(2)/SnO(2)/MnPc, possessing an estimated amount of 8 × 10(-10) mol cm(-2) of MnPc on the surface, was used to prepare an electrode to analyze dissolved oxygen in water by an electrochemical technique. The electrode was prepared by mixing the material with ultrapure graphite and evaluated using differential pulse voltammetry. Dissolved O(2) was reduced at -0.31 V with a limit of detection (LOD) equal to 7.0 × 10(-4) mmol L(-1). A mechanism involving four electrons in O(2) reduction was determined by the rotating disk electrode technique.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP14325247	Manganese(II) phthalocyanine		14325-24-7	Price

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