Reply to L.K. Bieniasz's comments on my paper [J. Electroanal. Chem. 529 (2002) 97]

Rudolph, Manfred

doi:10.1016/s0022-0728(03)00379-6

Cited by 155 publications

(218 citation statements)

References 3 publications

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“…The SWV is capable to discriminate the charging current as well as to provide an insight into both half-electrode reactions, making this technique particularly suitable for studying the electrode mechanism [27][28][29][30][31][32][33][34][35]. Several electrode mechanisms involving chemical reactions under semi-infinite diffusion mass transfer in SWV have been studied by Osteryoung and OÕDea [2,4] and others [16][17][18][19][20]22,23]. Beside the diffusion controlled electrode reactions, significant attention has also been paid to the diffusionless electrode reactions, e.g., the surface electrode reactions [3,13,14,21,[24][25][26][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of a surface electrode reaction preceded by a homogeneous chemical reaction under conditions of square-wave voltammetry

Gulaboski

Mirčeski

Lovrić

et al. 2005

Electrochemistry Communications

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A theoretical model of a surface electrode reaction coupled with a preceding chemical reaction (surface CE electrode mechanism) is theoretically studied under conditions of square-wave voltammetry. The position and the shape of the theoretical voltammograms are function of the redox kinetic parameter k ¼ ks f where k s is the standard electron exchange rate constant and f is the frequency of the potential modulation, chemical kinetic parameterf , where k f and k b are the forward and backward rate constants of the preceding chemical reaction, respectively, and the equilibrium constant of the chemical reaction K. The influence of all these parameters to the theoretical square-wave voltammograms is investigated in detail. A theoretical methodology for estimation of the kinetic and thermodynamic parameters of the electrode mechanism is proposed.

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Section: Introductionmentioning

confidence: 99%

Theoretical study of a surface electrode reaction preceded by a homogeneous chemical reaction under conditions of square-wave voltammetry

Gulaboski

Mirčeski

Lovrić

et al. 2005

Electrochemistry Communications

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“…The homogeneous rate constants were estimated by analyzing the cyclic voltammetric responses, using the DigiElch simulation software. 17) C, H, N analyses were performed on a Vario EL III elemental analyzer.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Oxidation of Catechols in the Presence of Phenyl-Meldrum's Acid. Synthesis and Kinetic Evaluation

Nematollahi

Bamzadeh

Shayani‐Jam

2010

CHEMICAL & PHARMACEUTICAL BULLETIN

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23Catechol, by itself, and mono-substituted catechols are active in part against Pseudomonas, Bacillus, but not Penicillium species. Many flavonoids and catechol derivatives turned out to be as antimicrobial agents. 1) In this connection, in order to synthesis catechol derivatives, we studied the electrochemical oxidation of benzenediols in the presence of CH acid nucleophiles, 2-4) SH acid nucleophiles, 5-9) nitrite ion 10) and triphenylphosphine. 11) Also, it is demonstrated that, in comparison with simple catechols, the "highly oxygenated compounds with catechol ring" exhibit interesting biological activities.12,13) Therefore, the development of a simple synthetic route for the synthesis of "highly oxygenated compounds with catechol ring" from readily available reagents is one of the major tasks. In this direction, we recently reported the synthesis of some "highly oxygenated compounds with catechol ring." 14) This idea prompted us to investigate the electrochemical oxidation of catechols in the presence of phenyl-Meldrum's acid as a nucleophile and represents a facile and one-pot electrochemical method for the synthesis of some new "highly oxygenated compounds with catechol ring." Also, an additional purpose of this work is the kinetic and mechanistic study of the electrochemical oxidation of catechols in the presence of phenyl-Meldrum's acid and the estimation of the observed homogeneous rate constants (k obs ) of reaction of electrochemically generated o-benzoquinones with this nucleophile by digital simulation of cyclic voltammograms. Results and DiscussionElectrochemical Investigations The cyclic voltammogram of 1.0 mM catechol (1a) in aqueous solution containing 0.2 M acetate buffer (pHϭ5.0) shows one anodic peak (A 1 ) and the corresponding cathodic peak which correspond to the transformation of catechol (1a) to o-benzoquinone (2a) and vice-versa, within a quasi-reversible two electron process (Fig. 1, curve a).2-11) The electrooxidation of catechol (1a) in the presence of phenyl-Meldrum's acid (3) was studied in some detail. Fig. 1, curve b, shows the first cyclic voltammogram obtained for a 1.0 mM solution of 1a in the presence of 0.1 mM phenyl-Meldrum's acid (3). The voltammogram exhibits one anodic peak (A 1 ) and one cathodic peak (C 1 ) that shows decreasing in comparison to the cathodic peak of catechol (1a) in the absence of 3. In this figure, curve c is the voltammogram of 3 in the absence of 1a.The effect of potential sweep rate on shape of cyclic voltammograms of catechol (1a) in the presence of phenylMeldrum's acid (3) was studied, too. It is seen that, proportional to the augmentation of the potential sweep rate, the height of peak C 1 increases. A similar situation is observed when the 3 to 1a concentration ratio is decreased. A plot of the peak current ratio (I pC1 /I pA1 ) versus the scan rate for a mixture of catechol (1a) and phenyl-Meldrum's acid (3) confirms the reactivity of o-benzoquinone (2a) toward phenylMeldrum's acid (3), appearing as an increase in the peak cur- Electrochemic...

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“…18 The theory of this technique is well developed for the stationary planar electrode covered by thin mercury film, 19 but not for spherical electrodes because of the need to consider the diffusion within the mercury drop. [20][21][22] This problem was investigated for the cathodic reaction, without the accumulation, in our previous paper. 23 In this communication the dependence of anodic stripping square-wave voltammetric net peak current and peak potential on the electrode radius and frequency is investigated theoretically for the reversible reduction of amalgam forming ions.…”

Section: Introductionmentioning

confidence: 99%

Theory of Anodic Stripping Square Wave Voltammetry on Spherical Mercury Electrodes

Komorsky‐Lovrić¹,

Lovrić²

2014

Croat. Chem. Acta

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Reply to L.K. Bieniasz's comments on my paper [J. Electroanal. Chem. 529 (2002) 97]

Cited by 155 publications

References 3 publications

Theoretical study of a surface electrode reaction preceded by a homogeneous chemical reaction under conditions of square-wave voltammetry

Theoretical study of a surface electrode reaction preceded by a homogeneous chemical reaction under conditions of square-wave voltammetry

Electrochemical Oxidation of Catechols in the Presence of Phenyl-Meldrum's Acid. Synthesis and Kinetic Evaluation

Theory of Anodic Stripping Square Wave Voltammetry on Spherical Mercury Electrodes

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