Complex iron ions as catalysts for the autooscillating oxidation of malonic acid and its analogs with bromate

Вавилин, В.А.; Gulak, P. V.; Zhabotinskii, A. M.; Заикин, А. Н.

doi:10.1007/bf00906543

Cited by 8 publications

(12 citation statements)

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“…The system under investigation, however, is more complicated because one of the components (perbenzoic acid) is produced during the process. Vavilin and Zaikin (1971) observed during the oxidation of ferroin with brómate a stirring effect similar to the stirring effect observed in the Co11 oxidation as presented above. A detailed explanation, however, was not given by these authors.…”

Section: Discussionsupporting

confidence: 83%

Conversion of Cobalt(II) Acetate into Cobalt(III) Acetate by Autoxidizing Benzaldehyde

Nemecek¹,

Hendriks²,

Beek³

et al. 1978

Ind. Eng. Chem. Prod. Res. Dev.

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Section: Discussionsupporting

confidence: 83%

Conversion of Cobalt(II) Acetate into Cobalt(III) Acetate by Autoxidizing Benzaldehyde

Nemecek¹,

Hendriks²,

Beek³

et al. 1978

Ind. Eng. Chem. Prod. Res. Dev.

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“…Its photoresponse has attracted considerable attention, since light is an excellent external control parameter for its facility in controlling intensity as well as wavelength. 1 However, the mechanistic aspects of the photoresponse are fairly complicated and are still in controversy.…”

Section: Introductionmentioning

confidence: 99%

“…By use of a photosensitive catalyst such as the tris(2,2‘-bipyridine)ruthenium(II) ion (hereafter abbreviated Ru(bpy) 3 2+ ), it exhibits some interesting responses to light, such as the photoinduction and -inhibition of oscillations in the homogeneous system and the photoassisted spatial pattern formation in the inhomogeneous system. Its photoresponse has attracted considerable attention, since light is an excellent external control parameter for its facility in controlling intensity as well as wavelength …”

Section: Introductionmentioning

confidence: 99%

Transient Photoresponse of the Tris(2,2‘-bipyridine)ruthenium(II)-Catalyzed Minimal Bromate Oscillator

Kaminaga

Hanazaki

1998

J. Phys. Chem. A

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The tris(2,2‘-bipyridine)ruthenium(II)-catalyzed minimal bromate oscillator under flow conditions was found to exhibit various dynamical responses to the pulsed-light perturbation in the visible region. The system in its reduced steady state exhibits excitability with a threshold in the applied light-pulse energy, while the oxidized steady state does not respond to the light pulse. The latter exhibits, however, a slow response without a threshold to the negative light pulse. The system in its oscillatory state exhibits a phase shift of oscillations upon application of a pulsed-light perturbation. The oscillation phase is mostly advanced or unaffected, depending on the phase of application of the light pulse, although a narrow region of phase delay has also been found in between. A phase portrait spanned by the redox potential and the bromide ion-selective electrode potential has been determined experimentally on the basis of which the system dynamics is discussed in detail. All these results suggest the importance of the photoproduction of extra HBrO2 upon pulsed-light illumination to induce the autocatalytic process that forces the system to experience a single turn along the limit cycle. A numerical calculation based on the Noyes−Field−Thompson model has supported the proposed features, demonstrating that the pulsed addition of HBrO2 reduces the concentration of Br- quickly. When it is reduced below a certain threshold value, the autocatalytic growth of HBrO2, as well as of the catalyst in its oxidized form, is initiated to exhibit the response corresponding to the observation.

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“…Depuis lors de nombreux travaux y ont etk consacrks; citons principalement ceux de Zhabotinskii et coll. (2)(3)(4), de Degn (9, de Kasperek et Bruice (6) et de Noyes et coll. (7)(8)(9).…”

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Réaction oscillante de Belousov. 1. Cinétique de la réaction bromate–céreux

Herbo¹,

Schmitz²,

Glabbeke³

1976

Can. J. Chem.

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54,2628 (1976). During the oxidation of malonic acid by potassium bromate catalyzed by the Ce(II1)-Ce(1V) couple in a sulfuric acid solution, concentration oscillations of ceric and bromide ions are observed. This reaction, discovered by Belousov, can be resolved into two parts: reduction of bromate by cerous ions and oxidation of malonic acid by ceric ions. The former shows very unusual kinetic features and its mechanism is the basis of the explanation of the oscillations. It is autocatalytic but inhibited by bromide ions. We have thus reinvestigated this reaction varying not only the initial concentrations of bromate and of cerium but also that of bromide. The mechanism suggested involves, besides the classic steps of the bromate-bromide reaction, the oxidation of cerous ions by BrO,' radicals produced by the step HBrO, + Br,02 = 2Br0,' + Br-+ H+

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Complex iron ions as catalysts for the autooscillating oxidation of malonic acid and its analogs with bromate

Cited by 8 publications

References 0 publications

Conversion of Cobalt(II) Acetate into Cobalt(III) Acetate by Autoxidizing Benzaldehyde

Conversion of Cobalt(II) Acetate into Cobalt(III) Acetate by Autoxidizing Benzaldehyde

Transient Photoresponse of the Tris(2,2‘-bipyridine)ruthenium(II)-Catalyzed Minimal Bromate Oscillator

Réaction oscillante de Belousov. 1. Cinétique de la réaction bromate–céreux

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