Turbulent pattern in the 1,4-cyclohexanedione Belousov–Zhabotinsky reaction

Anupong, Suparinthon; Schreiber, Igor; Kheowan, On-Uma

doi:10.1039/d0cp04112b

Cited by 2 publications

(2 citation statements)

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“…CHD-BZ can also run inside gels, however with higher period around 83 s and lifetime 150 min or period 55 s and lifetime 210 min [25]. Shorter period, 40 s, was achieved in turbulent pattern also in gel system for 50 min [26].…”

Section: Discussionmentioning

confidence: 99%

“…A similar problem appears in networks of droplets containing a solution of BZ-reagents, that are stabilized by phospholipids dissolved in the surrounding, organic phase [24]. This problem can be solved by using 1,4-cyclohexanedione (CHD) [25], however the lifetime of oscillations can be shorter [26]. Chang et al showed that, the longer lifetime for BZ assemblages can be achieved by using equimolar solution of MA and CHD [23].…”

Section: Introductionmentioning

confidence: 99%

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Identification of the best medium for experiments on chemical computation with Belousov–Zhabotinsky reaction and ferroin-loaded Dowex beads

Muzika

Górecki

2022

Reac Kinet Mech Cat

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Our study is focused on identification of the best medium for future experiments on information processing with Belousov–Zhabotinsky reaction proceeding in Dowex beads with immobilized catalyst inside. The optimum medium should be characterized by long and stable nonlinear behavior, mechanical stability and should allow for control with electric potential. We considered different types of Dowex ion-exchange resins, bead distributions and various initial concentrations of substrates: malonic acid and 1,4-cyclohexanedione. The electric potential on platinum electrodes, stabilized by a potentiostat is used to control medium evolution. A negative electric potential generates activator species HBrO2 on the working electrode according to the reaction: BrO3− + 2e− + 3H+ → HBrO2 + H2O, while positive electric potential attracts inhibitor species Br− to the proximity of it. We study oscillation amplitude and period stability in systems with ferroin loaded Dowex 50W-X2 and Dowex 50W-X8 beads during experiments exceeding 16 h. It has been observed, that the above mentioned resins generate a smaller number of CO2 bubbles close to the beads than Dowex 50W-X4, which makes Dowex 50W-X2 and Dowex 50W-X8 more suitable for applications in chemical computing. We report amplitude stability, oscillation frequency, merging and annihilation of travelling waves in a lattice of Dowex 50W-X8 beads (mesh size 50–100) in over 19 h long experiments with equimolar solution of malonic acid and 1,4-cyclohexanedione. This system looks as a promising candidate for chemical computing devices that can operate for a day.

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Section: Discussionmentioning

confidence: 99%