Spectrophotometric and cyclic voltammetric study of interaction of Fe(iii) with vitamin B3 and vitamin B6

Rahman, Toufiqur; Hossain, Elius; Ehsan, Mohammad

doi:10.3329/jbas.v38i2.21339

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…For example, cyclic voltammetry at a platinum electrode in a nitrogen degassed nicotinic acid in KCl electrolyte yields no voltammetric signal in the range from +0.3 to +0.8 V vs Ag|AgCl. 76 Electrodes such as mercury and boron doped diamond have large overpotentials for hydrogen evolution and allow access to nicotinic acid electrochemistry.…”

mentioning

confidence: 99%

Critical Review—Electrochemical Properties of 13 Vitamins: A Critical Review and Assessment

Lovander

Lyon

Parr

et al. 2018

J. Electrochem. Soc.

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Review of the literature on the currently recognized, thirteen vitamins yields an overview of the electrochemical properties that include estimates of the formal potentials at physiological pH and identification of the general classes of redox mechanisms. All vitamins are electroactive and map a range of formal potentials E 0 over a 3 V window. The vitamins are grouped as lipid soluble (vitamins A, D, E, and K) and water soluble (B vitamins and vitamin C). Mechanisms are grouped as single electron transfer agents (B3, B7, B2, C, and D), vitamins that can be both oxidized and reduced (B1, B5, B6, B9, and E), and vitamins that undergo two successive, distinct reductions (B12 and K). Vitamin A voltammetry is uniquely complex. Plot of the formal potentials on a potential axis allows assessment of mechanistic paths to vitamin recycling, antioxidant behavior, pH dependence, electrochemical stability in air, acid, and water, electrochemical instability of vitamin pairs, and cooperative interactions between vitamins in medicine. The potential axis is shown as an effective tool for mapping thermodynamically complex interactions. By modern standards, the US federal government identifies 13 vitamins.3 The water soluble vitamins are vitamin C and the eight B vitamins (B1, B2, B3, B5, B6, B7, B9, B12). The lipid or fat soluble vitamins are A, D, E, and K. The fat soluble vitamins can accumulate in the body whereas the water soluble vitamins do not. There are no current vitamins designated beyond E except for K because materials historically assigned the interposed letter designations either no longer fall under the modern definition of vitamin or several related materials were reclassified. Several vitamins exist in different but related chemical structures.Questions considered in this perspective include whether all vitamins are electroactive; what is the redox potential of the vitamins; what are the kinetics and mechanisms of vitamins on oxidation and reduction; when are vitamins antioxidants; are vitamins stable to water and oxygen; do vitamins interact cooperatively. Although papers are available on the electrochemistry and voltammetry of individual vitamins, no single resource summarizes the electrochemical data for all vitamins. This review compiles and critically assesses the available literature on vitamin voltammetry. The compiled data serve to develop perspective on the electrochemical properties of vitamins and the role of vitamins individually and collectively as electroactive species. This CRES 3 T review assimilates fundamentals of thermodynamics and estimated formal potentials, kinetics, and mechanisms as assessed voltammetrically for individual vitamins to provide perspective on the collective electrochemical properties of the thirteen vitamins. Perspective on vitamin electrochemical properties may contribute to assess yet more complex bioelectrochemical processes. * Electrochemical Society Student Member.* * Electrochemical Society Fellow. z E-mail: johna-leddy@uiowa.eduThe review contains two main sections....

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confidence: 99%

Critical Review—Electrochemical Properties of 13 Vitamins: A Critical Review and Assessment

Lovander

Lyon

Parr

et al. 2018

J. Electrochem. Soc.

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“…Also, the current ratio of oxidation-reduction current peaks of FeII/FeIII was Ipa/Ipc ≈ 1. This demonstrates that the new modified electrode GP/SiO 2 NPs/GCE functioned as a reversible electrode [17], and the potential peak separation of ΔEpa-c ≈ 100 mV suggests that the reaction at the modified electrode was a homogenous process [18].…”

Section: Characterization Of Different Modified Electrodementioning

confidence: 80%

Performance Improvement of Working Electrode Using Grafted Polymer Modified with SiO2 Nanoparticles

Radhi¹,

Moosa²,

Khalaf³

2018

Nano BioMed ENG

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A new modified glassy carbon electrode (GCE) with grafted polymer (GP)/SiO 2 nanoparticles (SiO 2 NPs) were prepared using mechanical attachment method to produce a new sensor in cyclic voltammetric technique. The new working electrode GP/SiO 2 NPs/GCE was characterized by a standard solution of 1 mM K 4 [Fe(CN) 6 ] with 1 M K 2 HPO 4 as an electrolyte to study the redox current peaks of FeII/FeIII ions at different concentrations such as scan rate, pH, determination of diffusion coefficient (D f), reliability and stability of the modified GCE. It was found that the new modified electrode enhanced the redox current peaks of FeII/FeIII from 12 µA to 20 µA and-5 µA to-15 µA for oxidation and reduction peaks in GCE, repectevely. So, the current ratio (Ipa/Ipc) for the new modified electrode was 1, and the potential peak separation (ΔEpa-c) was 100 mV, which indicated good electrochemical properties as an irreversible electrode and heterogeneous reaction. Good reliability and stability of modified GCE was obseved with low detection limit. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) analysis of the nano-deposit was also studied.

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“…2. Table 2 shows that the value of current ratio I pa /I Pc of the sky honey at pH = 4.8 was equal to 1.2 (nearly to 1), meaning that the redox current peak was reversible process at these pH [14].…”

Section: Effect Of Different Phmentioning

confidence: 95%

Electrochemical Characterization of Sky Honey Mediated by Glassy Carbon Electrode Modified with Carbon Nanotube

Radhi¹,

Ibrahim²,

Mizher³

et al. 2018

Nano BioMed ENG

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Sky honey (SH), a kind of sweet was studied to identify its uses in human lives and its applications in different areas. Electrochemical analysis by cyclic voltammetry was used to characterize SH in aqueous solution. Glassy carbon electrode (GCE) was modified with carbon nanotube (CNT), i.e. CNT/GCE by mechanical attachment method via cyclic voltammetric technique to study the oxidation-reduction current peaks of SH at different electrolytes, concentrations, scan rates, pH and temperatures. Moreover, the study included the reliability and stability of CNT on the GCE surface.

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Spectrophotometric and cyclic voltammetric study of interaction of Fe(iii) with vitamin B3 and vitamin B6

Cited by 9 publications

References 9 publications

Critical Review—Electrochemical Properties of 13 Vitamins: A Critical Review and Assessment

Critical Review—Electrochemical Properties of 13 Vitamins: A Critical Review and Assessment

Performance Improvement of Working Electrode Using Grafted Polymer Modified with SiO2 Nanoparticles

Electrochemical Characterization of Sky Honey Mediated by Glassy Carbon Electrode Modified with Carbon Nanotube

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