Journal of Solution Chemistry

, Volume 42, Issue 1, pp 60–79

Chlorine Dioxide–Iodide–Methyl Acetoacetate Oscillation Reaction Investigated by UV–Vis and an Online FTIR Spectrophotometric Method

  • Laishun Shi
  • Na Li
  • Jie Liu
  • Chunying Yan
  • Xiaomei Wang
  • Chunlei Huai
Article

DOI: 10.1007/s10953-013-9955-3

Cite this article as:
Shi, L., Li, N., Liu, J. et al. J Solution Chem (2013) 42: 60. doi:10.1007/s10953-013-9955-3

Abstract

In order to study the chemical oscillatory behavior and mechanism of a new chlorine dioxide–iodide ion–methyl acetoacetate reaction system, a series of experiments were done by using UV–vis and an online FTIR spectrophotometric method. The initial concentrations of methyl acetoacetate, chlorine dioxide, potassium iodide, sulfuric acid, and the pH have great influences on the oscillations observed at the wavelength 350 nm. There is a pre-oscillatory or induction period, and the amplitude and number of oscillations are dependent on the initial concentration of the reactants. Equations were obtained for the variation of the triiodide ion reaction rate with the reaction time and the initial concentrations in the oscillation stage. The oscillation reaction was accelerated by increasing the temperature. The apparent activation energies for the induction period and the oscillation period are 55.65 and 33.00 kJ·mol−1, respectively. The intermediates were detected by the online FTIR analysis. Based upon the experimental data in this work and in the literature, a plausible reaction mechanism is proposed for the oscillation reaction.

Keywords

Chlorine dioxideOscillation reactionUV–vis spectrophotometryOnline FTIRApparent activation energyMethyl acetoacetate

Supplementary material

10953_2013_9955_MOESM1_ESM.doc (168 kb)
Supplementary material 1 (DOC 168 kb)

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Laishun Shi
    • 1
  • Na Li
    • 1
  • Jie Liu
    • 1
  • Chunying Yan
    • 1
  • Xiaomei Wang
    • 1
  • Chunlei Huai
    • 1
  1. 1.School of Chemistry and Chemical EngineeringSouth Campus, Shandong UniversityJinanPeople’s Republic of China