In situ UV-visible spectroelectrochemistry in the course of oxidative monomer electrolysis

Конев, Д. В.; Istakova, Olga I.; Sereda, Olha; Shamraeva, Maria; Devillers, Charles H.; Воротынцев, М. А.

doi:10.1016/j.electacta.2015.06.076

Cited by 18 publications

(12 citation statements)

References 35 publications

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“…In situ spectroelectrochemical method [35] enables one to determine any moment of the electrodeposition process (Fig. 1) both the number of already oxidized monomer species, N tot , and the total passed charge, Q tot , so that one can calculate the average charge spent per oxidized monomer species: n e = Q tot / (F N tot ).…”

Section: Methodology For Determination Of Parameters Of Electropolymementioning

confidence: 99%

“…In this study, the above EQCM data for the pMgP-I polymer have been combined with those obtained with the use of the earlier proposed spectroelectrochemical technique [35]. This method is based on experimental measurement of the relation between the number of oxidized monomer molecules and the passed charge in the course of the oxidative electrolysis resulting in polymer film deposition at electrode surface.…”

Section: Spectroelectrochemical Measurementsmentioning

confidence: 99%

“…The algorithm of its deconvolution of these spectra due to the monomer and oxidation products' absorption proposed in Ref [35] measured for a set of values of the passed charge, Q tot , allows one to determine the remaining amount of the solute monomer, N MgP , i.e., the total amount of the monomer molecules which has been oxidized by this moment, N tot = N°M gP − N MgP (N°M gP is the initial amount of the monomer before the start of the oxidation).…”

Section: Spectroelectrochemical Measurementsmentioning

confidence: 99%

“…9b, together with its approximation line in which extrapolation up to the X-axis determines the average number of electrons, n e , spent on formation of all oxidation products (both as the film on the electrode surface) and as by-products (polymer formed outside the electrode surface as well as solute oligomers). Detailed assignment of bands, description of the deconvolution algorithm, and another example of determination of n e may be found in [35].…”

Section: Spectroelectrochemical Measurementsmentioning

confidence: 99%

“…Material and charge balances of this electropolymerization process were explored later by means of the in situ UV-vis spectroelectrochemical method, via control of variation of the MgP concentration in solution during the process [35]. It allowed us to estimate crudely the number of electrons spent per monomer molecule for its transformation into monomer unit inside the film, 2.4-2.5.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical quartz crystal microbalance study of magnesium porphine electropolymerization process

Istakova

Конев

Goncharova

et al. 2020

J Solid State Electrochem

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Material and charge balances in the course of the electropolymerization process of the non-substituted Mg(II) porphine (MgP) at a low oxidation potential from its acetonitrile solutions of various concentrations have been studied via the in situ electrochemical quartz crystal microbalance method (EQCM). Thus, registered electrode mass increase due to the MgP oxidation at its surface has been used, in combination with in situ spectroelectrochemical data, for determination of the key parameters of the polymerization process and of the magnesium polyporphine films deposited on the electrode surface: current efficiency of the film deposition process, average charge spent for transformation of a monomer molecule into monomer unit inside the film, number of monomer units inside the deposited film, average number of valence bonds per one monomer unit inside the film. Besides, the EQCM method applied to the discharge process of the electropolymerized film has allowed us to estimate the average charging (oxidation) degree of the monomer unit inside the film at the polymerization potential and the degree of the solvent participation in the course of the polymer's redox transitions. It has been established that the number of bonds between porphine units is within the range of 2.2 to 2.4, with its slight increase for films deposited at higher monomer concentrations. Conclusions on the structure of polyporphine chains have been made.

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Section: Methodology For Determination Of Parameters Of Electropolymementioning

confidence: 99%

Section: Spectroelectrochemical Measurementsmentioning

confidence: 99%

Section: Spectroelectrochemical Measurementsmentioning

confidence: 99%

Section: Spectroelectrochemical Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Electrochemical quartz crystal microbalance study of magnesium porphine electropolymerization process

Istakova

Конев

Goncharova

et al. 2020

J Solid State Electrochem

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Electrochemical route to Co(II) polyporphine

Istakova

Конев

Zyubin

et al. 2016

J Solid State Electrochem

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International audienceNovel synthetic route towards electroactive films of Co(II) polyporphine has been elaborated. It is based on the electrochemical transformation of the metal-free polyporphine film with replacement of protons inside the macrocycles by Co(II) cations. Compared to the conventional procedure of such ion exchange based on extended thermal treatment of macrocycles in the presence of the saturated solution of the metal salt, the developed approach allows one to use dilute solutions of the metal cation at ambient conditions. The resulting Co(II) polyporphine possesses a very high concentration of CoN4 functional groups which are known as prospective catalysts of various processes

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Recent advances in the field of conducting polymers

Inzelt

2017

J Solid State Electrochem

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In situ UV-visible spectroelectrochemistry in the course of oxidative monomer electrolysis

Cited by 18 publications

References 35 publications

Electrochemical quartz crystal microbalance study of magnesium porphine electropolymerization process

Electrochemical quartz crystal microbalance study of magnesium porphine electropolymerization process

Electrochemical route to Co(II) polyporphine

Recent advances in the field of conducting polymers

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