Determination of S(IV) Oxoanions at Poly[Ru(5‐NO₂‐Phen)₂Cl] Tetrapyridylporphyrin Glassy Carbon Modified Electrode

Abstract

Glassy carbon electrodes modified with conducting polymers of Ni(II), Zn(II) and metal free tetraruthenated porphyrin were evaluated for reduction and oxidation processes of S(IV) oxoanions in Na2SO3/water‐ethanol at pH 1.0 and 3.5, showing electrocatalytic activity. A Ni(II) film was able to reduce the S(IV) oxoanions selectively in presence of high concentration of gallic acid. The Ni(II) film was also used as an amperometric sensor toward S(IV) oxoanions reduction in white wine samples showing a detection and quantification limit of 1.40 mg L−1 and 4.68 mg L−1, respectively. These results are promising for the electrochemical determination of S(IV) using conducting polymers from these macrocycles.

Electrochemical Determination of N,n-Dimethyltryptamine in Water Based on Tetraruthenated Porphyrins and Ionic Liquid Modified Electrodes

“…These kinds of macrocycles are particularly attractive because they display unusual electrocatalytic [21,22] and photoelectrochemical [23,24] properties. In particular, these porphyrins have been used in the electroanalytical detection of S (IV) oxoanions [25][26][27] and the electrocatalytic reduction processes of O2 [28] and CO2 [29,30]. In all cases, a multielectron transfer is essential to the enhancement of the catalytic activity [25][26][27][28]31].…”

Quick and Easy Modification of Glassy Carbon Electrodes with Ionic Liquid and Tetraruthenated Porphyrins for the Electrochemical Determination of Atrazine in Water

“…These kind of macrocycles are particularly attractive because they display unusual electrocatalytic and photoelectrochemical properties . In particular, these porphyrins have been used in the electroanalytical detection of S (IV) oxoanions and electrocatalytic reduction of O 2 and CO 2 . In all cases, a multielectron transfer is essential to enhance the catalytic activity .…”

Electrocatalytic Transformation of Carbon Dioxide into Low Carbon Compounds on Conducting Polymers Derived from Multimetallic Porphyrins

“…These macrocyclesa re particularly attractive because they display unusuale lectrocatalytic, [21] electroanalytical, [22,23] photophysics, [24] and photoelectrochemical [25][26][27] properties. In particular,t hese porphyrins have been used in the electroanalytical detection of S IV oxoanions [28][29][30] and electrocatalytic reduction processes of O 2 [31] NO 2 À , [32,33] and CO 2 . [34,35] In all cases, multielectron transfer is essentialt oe nhance catalytic activity,w hichi so bserved by changes to current density associatedw ith each process.…”