Oscillations in chemical systems. X. Implications of cerium oxidation mechanisms for the Belousov-Zhabotinskii reaction

Mechanistic details of the Belousov–Zhabotinsky oscillations. II. The organic reaction subset

“…Barkin and co-workers [7] have subsequently shown that this objection can be removed by a slight modification of the rate constants and that this modification satisfactorily models some unusual features of the oxidation of cerous ion by bromate [12,13]. Jwo and Noyes [6,16] have pointed out that oxidation of formic acid by bromine may have to be considered in a detailed model. Finally, Barkin and co-workers [a] have discovered that previous studies of ceric oxidation of malonic acid may have been affected by dissolved oxygen.…”

The Role of Bromination Reaction in the Oxalic Acid-Acetone-KBrO3-Ce(IV)-H2SO4 Oscillating System

“…This discovery has led to the proposal of a B-Z mechanism being different from the FKN mechanism, in which it relies upon Br 2 control rather than Brcontrol of the oscillations [12][13]. In addition, Noszticzius et al [13] proposed another problem about the value of f, where f is a stoichiometric factor, meaning the number of bromide ions regenerated in Process C. The oscillations will fail to occur if f < 0.25 [14], however, a partial oxidation of bromomalonic acid alone requires 4 Ce 4+ and produces only one bromide ion. Meanwhile, some organic compounds also react with Ce 4+ but no bromide ions yield, such as malonic acid [14], will result in an f below the critical value of 0.25.…”

Ru(II)(tpy)2-functionalized hydrogels: Synthesis, reversible responsiveness, and coupling with the belousov-zhabotinsky reaction

“…Generally, a self‐oscillating hydrogel system is constructed by coupling hydrogel containing Ru(bpy) 3 (bpy=2,2′‐bipyridine) with the Belousov‐Zhabotinsky (BZ) reaction . Along with the redox oscillation of Ru(bpy) 3 moieties, the polymer chains undergo spontaneous soluble/insoluble transition and this induces an autonomous mechanical oscillation of the hydrogels, just like beat of the heart.…”