Issue 34, 2011

Complex kinetics and significant influences of bromine removal in ferroin–bromate–metol reaction

Abstract

This study presents a new bromate-based chemical oscillator that employs metol as the organic substrate. Complex reaction behaviors were observed when the system was subjected to bromine removal and oxygen exposure. Transitions from simple to sequential oscillations took place as a function of the age of the metol stock solution. MS spectroscopy measurements and parallel kinetic experiments with a mixture of metol and hydroquinone suggest that the decomposition of metol to hydroquinone was responsible for the observed influence of oxygen and the age of the metol solution. GS/MS and NMR measurements revealed that 1,4-benzoquinone and bromobenzoquinones were the major final products, regardless of the presence of oxygen and bromine removal. Preliminary exploration in a capillary tube showed some interesting propagating pulse behavior.

Graphical abstract: Complex kinetics and significant influences of bromine removal in ferroin–bromate–metol reaction

Supplementary files

Article information

Article type
Paper
Submitted
03 Apr 2011
Accepted
13 Jun 2011
First published
02 Aug 2011

Phys. Chem. Chem. Phys., 2011,13, 15539-15545

Complex kinetics and significant influences of bromine removal in ferroin–bromate–metol reaction

J. Li and J. Wang, Phys. Chem. Chem. Phys., 2011, 13, 15539 DOI: 10.1039/C1CP21028A

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