Benzoquinone modified electrode for sensing NADH and ascorbic acid

Murthy, A. S. N.; Sharma, Jyotsna

doi:10.1016/s0039-9140(97)00201-4

Cited by 39 publications

(19 citation statements)

References 18 publications

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“…Hence the electrocatalysis of ascorbic acid through the employment of transition metal macrocyclic compounds [31], conducting polymeric films [32,33], ferrocene carboxylic acids [34], and transition metal hexacyanoferrates [35,36] has been investigated over the past number of years. In addition some chemically modified electrodes with various mediators attached at the electrode surface have been employed for the mediated oxidation of ascorbic acid [37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Voltammetric behaviour, homogeneous charge transport dynamics and electrocatalytic properties of an Os2+ functionalised pyrrole monomer

Foster¹,

Allen²,

McCormac³

2004

Journal of Electroanalytical Chemistry

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The Os 2+ functionalised pyrrole monomer, Osmium-bis-N,N'-(2,2'-bipyridyl)-N-(pyridine-4-ylmethyl-(8-pyrrole-1yl-octyl)-amine)chloride, 1, has been synthesised and characterised by spectroscopic (UV/Vis, 1 H NMR, IR spectroscopy) techniques and cyclic voltammetry.Solution phase studies of 1 gave a redox couple associated with the Os 3+/2+ and an irreversible wave associated with the oxidation of the pyrrole moiety. Attempts to form stable polymeric films of 1 onto vitreous carbon electrodes, by homopolymerisation, proved unsuccessful. However electroactive films of 1 were obtained by the electrooxidation of 1 through the Os 3+/2+ couple in low dielectric media such as toluene/acetonitrile mixtures.

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Section: Introductionmentioning

confidence: 99%

Voltammetric behaviour, homogeneous charge transport dynamics and electrocatalytic properties of an Os2+ functionalised pyrrole monomer

Foster¹,

Allen²,

McCormac³

2004

Journal of Electroanalytical Chemistry

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“…First, direct electrocatalytic reduction/oxidation of analyte can result in amperometric sensing scheme (Figure 12(a)), in which analyte concentration is known from the amplitude of current. Electrocatalytic oxidation of NADH by quinone is a wellknown example, [69][70][71] and Ca 2+ ion addition to PQQ-modified electrode was found to increase the amplitude of the electrocatalytic current.…”

mentioning

confidence: 99%

The Electrochemical Reaction Mechanism and Applications of Quinones

Kim¹,

Chung²

2014

Bulletin of the Korean Chemical Society

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This tutorial review provides a general account of the electrochemical behavior of quinones and their various applications. Quinone electrochemistry has been investigated for a long time due to its complexity. A simple point of view is developed that considers the relative stability of the reduced quinone species and the values of the first and second reduction potentials. The 9-membered square scheme in buffered aqueous solutions is explained and semiquinone radical stability is discussed in this context. Quinone redox reaction has also been employed in various studies. Diverse examples are presented under three broad categories defined by the roles of quinone: molecular tool for physical chemistry, versatile electron mediator, and charge storage for energy conversion devices.

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“…4,5 Therefore, some chemically modified electrodes with various active mediators immobilized at the electrode surface have been used for the catalysis of electrooxidation of AA. [6][7][8][9][10] These include a glassy carbon electrode (GCE) and a carbon paste electrode with complexes and organic compounds, such as cobalt hexacyanoferrate, 11 ruthenium(III) diphenyldithiocarbamate, 12 cobalt pentacyanonitrosylferrate, 13 ferrocene with b-cyclodextrin, 14 ferrocenecarboxylic acid, ferroceneacetic acid, ferrocenemetal, 15,16 poly(malachite green), 17 benzoquinone, 18 norepinephrine, 19 Ni[Me2(CH3CO)], 14 tetraenoN4 complex, 20 and aniline. 21 Carbon paste electrode (CPE) is one of the convenient conductive matrixes that allow one to prepare the chemically modified electrodes (CMEs) by simple mixing of graphite/binder paste and modifier.…”

Section: Introductionmentioning

confidence: 99%

“…18 This fact allows the design of a new electrocatalytic scheme for AA determination. In this paper, we report the electrochemical behavior of 2,2¢-[3,6-dioxa-1,8-octanediylbis (nitriloethylidyne)]-bis-hydroquinone (Scheme 1)-modified carbon paste electrode (DOHMCPE).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behavior of Ascorbic Acid at a 2,2'-[3,6-Dioxa-1,8-octanediylbis(nitriloethylidyne)]-bis-hydroquinone Carbon Paste Electrode

et al. 2008

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Electrocatalytic oxidation of ascorbic acid (AA) at a carbon paste electrode, chemically modified 2,2¢-[3,6-dioxa-1,8-octanediylbis(nitriloethylidyne)]-bis-hydroquinone, was thoroughly investigated. The results of cyclic voltammetry, double potential-step chronoamperometry, linear sweep voltammetry and differential pulse voltammetry (DPV) studies were used for the prediction of the mechanism of electrochemical oxidation of AA mediated with 2,2¢-[3,6-dioxa-1,8-octanediylbis(nitriloethylidyne)]-bis-hydroquinone at the surface of the modified electrode. The diffusion coefficient (D = 2.45 ¥ 10 -5 cm 2 s -1 ) and the kinetic parameters such as the electron transfer coefficient (a = 0.34) were also determined. The results of DPV using the 2,2¢-[3,6-dioxa-1,8-octanediylbis(nitriloethylidyne)]-bis-hydroquinonemodified electrode were applied in a highly sensitive determination of AA in drug samples. A linear range of 3.0 ¥ 10 -6 -1.2 ¥ 10 -4 M and the detection limit (3s) 3.8 ¥ 10 -7 M were obtained for DPV determination of AA in buffered pH 7.00 solutions (0.1 M phosphate buffer).

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Benzoquinone modified electrode for sensing NADH and ascorbic acid

Cited by 39 publications

References 18 publications

Voltammetric behaviour, homogeneous charge transport dynamics and electrocatalytic properties of an Os2+ functionalised pyrrole monomer

Voltammetric behaviour, homogeneous charge transport dynamics and electrocatalytic properties of an Os2+ functionalised pyrrole monomer

The Electrochemical Reaction Mechanism and Applications of Quinones

Electrochemical Behavior of Ascorbic Acid at a 2,2'-[3,6-Dioxa-1,8-octanediylbis(nitriloethylidyne)]-bis-hydroquinone Carbon Paste Electrode

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