The Interaction of Water‐Soluble Manganese Porphyrins with DNA Films and Their Electrocatalytic Properties with Hydrazine

Abstract

The electrochemistry of water-soluble manganese porphyrins (Mn(4-TMPyP)) has been studied as an electrochemically-active film on double-stranded deoxyribonucleic acid (dsDNA) modified electrodes in solutions at various pH. An electrochemical quartz crystal microbalance and cyclic voltammetry were used to study the in situ deposition of DNA on gold disk electrodes, and Mn(4-TMPyP) (manganese meso-tetrakis-(N-methyl-4-pyridyl)porphyrin) deposition on DNA film modified electrodes. Mn II (4-TMPyP) (the reduced form) is more easily deposited on a DNA film than Mn III (4-TMPyP) (the oxidized form). Electrodeposition of Mn(4-TMPyP) can be performed in strong basic aqueous solutions, and shows two redox couples with electrochemically active voltammograms. The films can also be produced on glassy carbon, platinum, gold, and transparent semiconductor tin (IV) oxide electrodes. The Mn(4-TMPyP)/DNA film was electrocatalytically oxidative for hydrazine, hydroxylamine, and SO . Electrocatalytic oxidation by a Mn(4-TMPyP) film as a catalyst for hydrazine oxidation is also discussed. This shows a new anodic peak current in the second segment after the positive scan during electrocatalytic oxidation, and is pH dependent.

Sensitive Hydrazine Detection Using a Porous Mn2O3 Nanofibers‐Based Sensor

“…Different materials, such as metal complexes of phthalocyanine [10,11], hexacynoferrates [12], porphyrins [13], noble metals (e.g. gold [14], palladium [1], etc), and nanostructured metal oxides (e.g.…”

Cobalt Hexacyanoferrate-Decorated Titania Nanotube: CoHCF@TNT Modified GCE as an Electron Transfer Mediator for the Determination of Hydrazine in Water Samples

“…Therefore, chemically modified electrodes have been developed for the determination of hydrazine. Several types of modified electrode have been used for the electrocatalytic oxidation of hydrazine such as metal phthalocyanine [27,28], metal porphyrin [29], metal hexacyanoferrate [30,31], metal complexes [32], metal nanoparticles [33], and metal nanoparticles-modified MWCNT- [34] modified electrodes. Among these electron transfer mediators, metal hexacyanoferrates [35], metal hexacyanoferrate-modified metal oxide [36], and metal hexacyanoferrate-modified carbon nanotube [37] have been widely used for the electrocatalytic detection of hydrazine in various sources.…”

Electrochemical Sensing and Photoelectrodegradation of Pentachlorophenol using Co‐, Mn‐ and Zn‐Porphyrins

“…Through modification of the structure of porphyrin, its electronic properties such as light absorption, redox processes, energy and electron transfer can be altered. [15,16] The rich redox chemistry of metal porphyrins make them ideal for electrocatalysis [16,17] hence the use of metal porphyrins in this study. We employ a glassy carbon electrode (GCE) and indium tin oxide (ITO) electrode modified with manganese ([Mn III (TMtPP)Cl]), cobalt ([Co II (TMtPP]), and zinc ([Zn(TMtPP)]) metalated meso-tetra-[4-(methylthio) phenyl] porphyrins for electrochemical sensing and photoelectrocatalytic degradation of pentachlorophenol (PCP).…”