The Chlorate–Nitrous Acid–Iodine–Iodide Oscillating Reaction

Monteiro, Emily V.; Queiroz, João P R; Faria, Roberto B.

doi:10.1021/acsomega.1c00933

Cited by 4 publications

(2 citation statements)

References 43 publications

(72 reference statements)

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“…There are also a few oscillating reactions that do not involve any halogen species, such as oscillations created by the reaction involving a sulphide ion and hydrogen peroxide [ 63 ], and the permanganate chemical oscillator in the presence of hydrogen peroxide and phosphoric acid [ 64 ]. However, the vast majority of COR require halogen compounds to occur [ 65 ], which may be attributed to the large number of oxidation states possessed by these compounds that promote the nonlinear dynamical chemistry of the COR systems. Despite the substantial number of chemically oscillatory processes that have already been reported, to our knowledge, there are no described oscillating systems where organohalogen (organic molecules functionalised with halogen elements) compounds are involved in the reaction, either as oxidants or reductants.…”

Section: Observations From the Tca Cycle And Lifeformsmentioning

confidence: 99%

Self-Similar Patterns from Abiotic Decarboxylation Metabolism through Chemically Oscillating Reactions: A Prebiotic Model for the Origin of Life

Papineau

Devine

Nogueira

2023

Life

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The origin of life must have included an abiotic stage of carbon redox reactions that involved electron transport chains and the production of lifelike patterns. Chemically oscillating reactions (COR) are abiotic, spontaneous, out-of-equilibrium, and redox reactions that involve the decarboxylation of carboxylic acids with strong oxidants and strong acids to produce CO2 and characteristic self-similar patterns. Those patterns have circular concentricity, radial geometries, characteristic circular twins, colour gradients, cavity structures, and branching to parallel alignment. We propose that COR played a role during the prebiotic cycling of carboxylic acids, furthering the new model for geology where COR can also explain the patterns of diagenetic spheroids in sediments. The patterns of COR in Petri dishes are first considered and compared to those observed in some eukaryotic lifeforms. The molecular structures and functions of reactants in COR are then compared to key biological metabolic processes. We conclude that the newly recognised similarities in compositions and patterns warrant future research to better investigate the role of halogens in biochemistry; COR in life-forms, including in humans; and the COR-stage of prebiotic carbon cycling on other planets, such as Mars.

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Section: Observations From the Tca Cycle And Lifeformsmentioning

confidence: 99%

Self-Similar Patterns from Abiotic Decarboxylation Metabolism through Chemically Oscillating Reactions: A Prebiotic Model for the Origin of Life

Papineau

Devine

Nogueira

2023

Life

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“…Bursting oscillation is one of the different types of oscillatory behavior observed in biological, physical, and chemical systems [30,[46][47][48][49]. It is characterized by the alternation of a silent phase and an active phase during each period of oscillation.…”

Section: Bursting Oscillationmentioning

confidence: 99%

On the modeling of some triodes-based nonlinear oscillators with complex dynamics: case of the Van der Pol oscillator

Tegnitsap¹,

Tsefack²,

Ngouonkadi³

et al. 2021

Phys. Scr.

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In this work, the dynamic of the triode-based Van der Pol oscillator coupled to a linear circuit is investigated (Triode-based VDPCL oscillator). Towards this end, we present a mathematical model of the triode, chosen from among the many different ones present in literature. The dynamical behavior of the system is investigated using classical tools such as two-parameter Lyapunov exponent, one-parameter bifurcation diagram associated with the graph of largest Lyapunov exponent, phase portraits, and time series. Numerical simulations reveal rather rich and complex phenomena including chaos, transient chaos, the coexistence of solutions, crisis, period-doubling followed by reverse period-doubling sequences (bubbles), and bursting oscillation. The coexistence of attractors is illustrated by the phase portraits and the cross-section of the basin of attraction. Such triode-based nonlinear oscillators can find their applications in many areas where ultra-high frequencies and high powers are demanded (radio, radar detection, satellites communication, etc.) since triode can work with these performances and are often used in the aforementioned areas. In contrast to some recent work on triode-based oscillators, LTSPICE simulations, based on real physical consideration of the triode, are carried out in order to validate the theoretical results obtained in this paper as well as the mathematical model adopted for the triode.

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From classical metal-catalyzed homogeneous oscillators to an uncatalyzed version of the Belousov–Zhabotinsky reaction: a review

Pribus

Orlik

Valent

2022

Reac Kinet Mech Cat

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The Chlorate–Nitrous Acid–Iodine–Iodide Oscillating Reaction

Cited by 4 publications

References 43 publications

Self-Similar Patterns from Abiotic Decarboxylation Metabolism through Chemically Oscillating Reactions: A Prebiotic Model for the Origin of Life

Self-Similar Patterns from Abiotic Decarboxylation Metabolism through Chemically Oscillating Reactions: A Prebiotic Model for the Origin of Life

On the modeling of some triodes-based nonlinear oscillators with complex dynamics: case of the Van der Pol oscillator

From classical metal-catalyzed homogeneous oscillators to an uncatalyzed version of the Belousov–Zhabotinsky reaction: a review

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