Voltammetry of nitrobenzene with cysteine and other acids in DMSO. Implications for the biological reactivity of reduced nitroaromatics with thiols

Andres, Theresa; Eckmann, Lars; Smith, Diane K.

doi:10.1016/j.electacta.2013.01.047

Cited by 21 publications

(19 citation statements)

References 64 publications

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“…These observations are in an agreement with the reduction of nitroaromatics discussed in the literature which exhibit 4‐electron irreversible reduction (peak I) of nitro group to hydroxylamine. The reversible pair (IIa/IIb) should therefore correspond to two electron hydroxyl‐amine/nitroso reversible reaction .…”

Section: Resultssupporting

confidence: 88%

“…HNN contains electrochemically active reducible nitro group on the phenyl moiety and oxidizable hydroxyl group on the naphthyl moiety (see Figure ). Structurally similar nitrobenzene‐like structures have been intensively studied by voltammetric methods on glassy carbon electrodes or by polarography in mixed N , N ‐dimethylformamide‐water solutions . One nitro group is usually reduced in one irreversible 4‐electron process giving hydroxylamine structure in an aqueous medium even in the presence of some organic solvent .…”

Section: Introductionmentioning

confidence: 99%

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Voltammetry of a Novel Antimycobacterial Agent 1‐Hydroxy‐N‐(4‐nitrophenyl)naphthalene‐2‐carboxamide in a Single Drop of a Solution

et al. 2017

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The aim of this study is the development of a miniaturized voltammetric method for the determination of an antimycobacterial agent 1-hydroxy-N-(4-nitrophenyl)naphthalene-2-carboxamide (HNN) in a single drop (20 mL) of a solution by cathodic and anodic voltammetry at a glassy carbon electrode. Cyclic voltammetry was used to investigate its redox properties followed by the optimization of differential pulse voltammetric determination in a regular 10 mL volume. The optimal medium for the analytical application of both cathodic and anodic voltammetry was found to be Britton-Robinson buffer pH 7.0 and dimethyl sulfoxide (9 : 1, v/v). HNN gave one cathodic peak at around À0.6 V and one anodic peak at around + 0.2 V vs. Ag j AgCl (3 mol L À1 KCl) reference electrode. Determination of HNN in a 10 mL volume gave the limit of quantification around 10 nmol L À1 by both adsorptive stripping anodic and cathodic voltammetry. Afterwards, miniaturized voltammetric methods in a single drop of solution (20 mL) were investigated. This approach requested some modifications of the cell design and voltammetric procedures. A novel method of removing dissolved oxygen in a single drop had to be developed and tested. Developed miniaturized voltammetric methods gave parameters comparable to the determination of HNN in 10 mL. The applicability of the miniaturized method was verified by the determination of HNN in a drop of a bacterial growth medium.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Voltammetry of a Novel Antimycobacterial Agent 1‐Hydroxy‐N‐(4‐nitrophenyl)naphthalene‐2‐carboxamide in a Single Drop of a Solution

et al. 2017

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“…The feature is oen absent from the rst anodic sweep by SCV, which could indicate that it reects oxidation of species formed during the previous cathodic scan, similar to the interpretation given in a study of analogous features in SCVs of nitrobenzene in DMSO. 148 However, inspection of the SWV data obtained in this study shows that when NOMs gave an analogous peak in the net SWV data (at about À1.8 V), it was mainly due to increased current in the forward scan, and there generally was no change in the SWV reverse scan. Since the former is anodic, it conrms that the sharp rise during anodic scans in the SCV data was due to oxidation.…”

Section: Qualitative Comparison Of Nom Voltammogramsmentioning

confidence: 58%

Electrochemical characterization of natural organic matter by direct voltammetry in an aprotic solvent

Pavitt

Tratnyek

2019

Environ. Sci.: Processes Impacts

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“…The FT-IR spectra exhibit the characteristic bands of amino acid and polymer matrix and suggest that although the chemical composition was identical, the frequencies were slightly different from each other [ 30 , 31 ].…”

Section: Resultsmentioning

confidence: 99%

Synergistic Inhibition Effect of Chitosan and L-Cysteine for the Protection of Copper-Based Alloys against Atmospheric Chloride-Induced Indoor Corrosion

Messina

Giuliani

Pascucci

et al. 2021

IJMS

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The protection of metals from atmospheric corrosion is a task of primary importance for many applications and many different products have been used, sometimes being toxic and harmful for health and the environment. In order to overcome drawbacks due to toxicity of the corrosion inhibitors and harmful organic solvents and to ensure long-lasting protection, new organic compounds have been proposed and their corrosion inhibition properties have been investigated. In this work, we describe the use of a new environment-friendly anticorrosive coating that takes advantage of the synergism between an eco-friendly bio-polymer matrix and an amino acid. The corrosion inhibition of a largely used Copper-based (Cu-based) alloy against the chloride-induced indoor atmospheric attack was studied using chitosan (CH) as a biopolymer and l-Cysteine (Cy) as an amino acid. To evaluate the protective efficacy of the coatings, tailored accelerated corrosion tests were carried out on bare and coated Cu-based alloys, further, the nature of the protective film formed on the Cu-based alloy surface was analyzed by Fourier-transformed infrared spectroscopy (FTIR) while the surface modifications due to the corrosion treatments were investigated by optical microscopy (OM). The evaluation tests reveal that the Chitosan/l-Cysteine (CH/Cy) coatings exhibit good anti-corrosion properties against chloride attack whose efficiency increases with a minimum amount of Cy of 0.25 mg/mL.

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Voltammetry of nitrobenzene with cysteine and other acids in DMSO. Implications for the biological reactivity of reduced nitroaromatics with thiols

Cited by 21 publications

References 64 publications

Voltammetry of a Novel Antimycobacterial Agent 1‐Hydroxy‐N‐(4‐nitrophenyl)naphthalene‐2‐carboxamide in a Single Drop of a Solution

Voltammetry of a Novel Antimycobacterial Agent 1‐Hydroxy‐N‐(4‐nitrophenyl)naphthalene‐2‐carboxamide in a Single Drop of a Solution

Electrochemical characterization of natural organic matter by direct voltammetry in an aprotic solvent

Synergistic Inhibition Effect of Chitosan and L-Cysteine for the Protection of Copper-Based Alloys against Atmospheric Chloride-Induced Indoor Corrosion

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