10.1021/acs.jpca.9b09642.s001
Ling Yuan
Ling
Yuan
Zhuoxuan Li
Zhuoxuan
Li
Mengfei Liu
Mengfei
Liu
Xiaoli Lv
Xiaoli
Lv
Qingyu Gao
Qingyu
Gao
Modulation Effects of Permanganate and Manganese(II)
Ions on the Oscillatory Dynamics in a Bromate–Sulfite Reaction
System
American Chemical Society
2020
pH oscillations
pH feedback process
study nonlinear
temperature oscillations
flow rate
modulation effects
Oscillatory Dynamics
feedback loop
period length change unmonotonically
oscillatory dynamics
nonmonotonic change
Modulation Effects
feedback agent
permanganate concentration
Large-amplitude temperature oscillations
2020-01-13 22:29:27
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Modulation_Effects_of_Permanganate_and_Manganese_II_Ions_on_the_Oscillatory_Dynamics_in_a_Bromate_Sulfite_Reaction_System/11594784
It is important to
study nonlinear dynamical systems showing pH
and temperature oscillations simultaneously. Here, we systematically
investigated the bromate–sulfite reaction in its coupled system.
Large-amplitude temperature oscillations could be measured accompanied
by the pH oscillations with or without permanganate and manganese(II)
ions. The modulation effects on the oscillatory dynamics of the bromate–sulfite
reaction system produced by permanganate and manganese(II) ions were
investigated in detail. On the one hand, with permanganate, an additional
negative pH feedback process between permanganate and bisulfite occurs,
leading to weakening the pH positive feedback. The above opposite
effects make the period length change unmonotonically when adjusting
the permanganate concentration and flow rate. On the other hand, with
Mn<sup>2+</sup> as the feedback agent, the nonmonotonic change of
period was not obvious because it only contained one feedback loop,
which can only reinforce negative feedback without affecting positive
feedback.