Effect of temperature and small amounts of metal ions on transient chaos in the batch Belousov–Zhabotinsky system

Didenko, O. Z.; Strizhak, P. E.

doi:10.1016/s0009-2614(01)00353-0

Cited by 8 publications

(12 citation statements)

References 27 publications

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“…Figure 3 shows the temporal evolution of oscillating reaction in the system of H 2 SO 4 -KBrO 3 - (Figure 3(b)). The oscillating behavior is the same as reported with the electrochemical methods [20,21]. However, the presence of NiO/SiO 2 nanoparticles had a considerable e ect on the BZ oscillating reaction and increased the intensity of oscillations together with decreasing their period.…”

Section: Resultssupporting

confidence: 80%

Study of the BZ oscillating system in the presence of silica nanoparticles containing NiO using a new approach: Conductometry

2016

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Oscillating chemical reactions are complex systems involving a large number of chemical species, such as ionic, radical, and molecular intermediates, which exhibit uctuation in their concentration with time. One of the oscillating chemical reactions is BZ fH 2 SO 4-KBrO 3-CH 2 (COOH) 2-Ce(IV)g system. In this work, for the rst time, a new, simple, and appropriate method, i.e. conductometry, was applied to the investigation of BZ oscillating system. Furthermore, presence of SiO 2 nanoparticles containing NiO apparently a ected the intensity and period of BZ system. The e ect of varying concentration of H 2 SO 4 , KBrO 3 , CH 2 (COOH) 2 , and Ce(IV) on the conductance of BZ oscillating chemical system at 20 (0.1) C was also investigated. The obtained results of this work indicated that rather than potential and color of the BZ system, the conductance of system also oscillates during the reaction and is also proportional to the reactants concentration as well. The intensity and period of the oscillation are strongly dependent on the concentration of reactants.

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Section: Resultssupporting

confidence: 80%

Study of the BZ oscillating system in the presence of silica nanoparticles containing NiO using a new approach: Conductometry

2016

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“…The BZ reaction stays much longer time in the reduced state of the ruthenium than in the oxidized state, and the switch between two states is relatively fast. Therefore, the consumption of the bromide ion is the frequency determining step, which is given by the following equation 37, 38 …”

Section: Resultsmentioning

confidence: 99%

“…E i is effective activation energies, R is the gas constant ( R = 8.314 J K −1 mole −1 ), and T is temperature in Kelvin. The induction time of nonlinear oscillatory reaction might also be interpreted using Arrhenius rate equation37, 46 where E ind is effective activation energy for the reactions responsible during induction time. The activation energy obtained from induction time measurement is very likely attributable to a sub reaction system that produces BrMA.…”

Section: Resultsmentioning

confidence: 99%

A comparative study of temperature dependence of induction time and oscillatory frequency in polymer‐immobilized and free catalyst Belousov‐Zhabotinsky reactions

Pullela¹,

Shen²,

Márquez³

et al. 2009

J Polym Sci B Polym Phys

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Environment-sensitive poly(N-isopropylacrylamide) (PNIPAM) microgel particles with covalently bonded ruthenium(4-vinyl-4 0 -methyl-2,2 0 -bipyridine) bis (2,2 0 -bipyridine) [Ru(vmbipy)(bipy) 2 ] display periodic size changes when placed in Belousov-Zhabotinsky (BZ) reaction substrates. The temperature dependency of the induction time and oscillatory frequency of the BZ reaction in this polymer-immobilized catalyst system were compared to the bulk BZ reaction with the catalyst in the solution phase. Prolonged induction times are observed for the immobilized catalyst, compared with free catalyst, while little difference is observed on the oscillation frequency. The Arrhenius frequency factor calculated using the induction time for the immobilized catalyst BZ reaction is about seven times smaller than that for the free catalyst Ru(bipy) 2þ 3 case. On the other hand, the Arrhenius frequency factors calculated using the oscillatory frequency are almost the same, showing similar reaction kinetics during the BZ oscillations. The tunability of the induction time using a polymer matrix, as we observed here, while maintaining similar oscillatory behavior, should provide a new dimension to control the self-assembling of BZ active particles.

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“…5,28,[39][40][41] These results have confirmed not only periodic but also chaotic dynamics in the BL system under CSTR conditions. 26,[42][43][44][45] Aside from the Bray-Liebhafsky reaction, chaotic dynamics has been well-documented in other reaction systems and processes, such as Belousov-Zhabotinsky [46][47][48][49][50][51][52][53][54][55][56][57] reaction, photochemical processes in the mesopause region, 58 Briggs-Rauscher reaction, 59,60 electrochemical processes, [61][62][63][64][65] combustion reactions, 66 three-variable 67,68 and coupled 69 three-variable autocatalator model etc.…”

Section: Introductionmentioning

confidence: 99%

Structures of chaos in open reaction systems

Ivanović-Šašić

Marković

Anić

et al. 2011

Phys. Chem. Chem. Phys.

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By numerically simulating the Bray-Liebhafsky (BL) reaction (the hydrogen peroxide decomposition in the presence of hydrogen and iodate ions) in a continuously fed well stirred tank reactor (CSTR), we find "structured" types of chaos emerging in regular order with respect to flow rate as the control parameter. These chaotic "structures" appear between each two successive periodic states, and have forms and evolution resembling to the neighboring periodic dynamics. More precisely, in the transition from period-doubling route to chaos to the arising periodic mixture of different mixed-mode oscillations, we are able to recognize and qualitatively and quantitatively distinguish the sequence of "period-doubling" chaos and chaos consisted of mixed-mode oscillations (the "mixed-mode structured" chaos), both appearing in regular order between succeeding periodic states. Additionally, between these types of chaos, the chaos without such recognizable "structures" ("unstructured" chaos) is also distinguished. Furthermore, all transitions between two successive periodic states are realized through bifurcation of chaotic states. This scenario is a universal feature throughout the whole mixed-mode region, as well as throughout other mixed-mode regions obtained under different initial conditions.

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Effect of temperature and small amounts of metal ions on transient chaos in the batch Belousov–Zhabotinsky system

Cited by 8 publications

References 27 publications

Study of the BZ oscillating system in the presence of silica nanoparticles containing NiO using a new approach: Conductometry

Study of the BZ oscillating system in the presence of silica nanoparticles containing NiO using a new approach: Conductometry

A comparative study of temperature dependence of induction time and oscillatory frequency in polymer‐immobilized and free catalyst Belousov‐Zhabotinsky reactions

Structures of chaos in open reaction systems

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