Cargando…
Chlorine Dioxide-Iodide-Methyl Acetoacetate Oscillation Reaction Investigated by UV-Vis and Online FTIR Spectrophotometric Method
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 online FTIR spectrophotometric method. The initial concentrations of methyl acetoacetate, chlorine dioxide...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Scientific World Journal
2012
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3289901/ https://www.ncbi.nlm.nih.gov/pubmed/22454614 http://dx.doi.org/10.1100/2012/918620 |
_version_ | 1782224913950572544 |
---|---|
author | Shi, Laishun Wang, Xiaomei Li, Na Liu, Jie Yan, Chunying |
author_facet | Shi, Laishun Wang, Xiaomei Li, Na Liu, Jie Yan, Chunying |
author_sort | Shi, Laishun |
collection | PubMed |
description | 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 online FTIR spectrophotometric method. The initial concentrations of methyl acetoacetate, chlorine dioxide, potassium iodide, and sulfuric acid and the pH value have great influence on the oscillation observed at wavelength of 289 nm. There is a preoscillatory or induction period, and the amplitude and the number of oscillations are associated with the initial concentration of reactants. The equations for the triiodide ion reaction rate changing with reaction time and the initial concentrations in the oscillation stage were obtained. Oscillation reaction can be accelerated by increasing temperature. The apparent activation energies in terms of the induction period and the oscillation period were 26.02 KJ/mol and 17.65 KJ/mol, 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 was proposed for the oscillation reaction. |
format | Online Article Text |
id | pubmed-3289901 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | The Scientific World Journal |
record_format | MEDLINE/PubMed |
spelling | pubmed-32899012012-03-27 Chlorine Dioxide-Iodide-Methyl Acetoacetate Oscillation Reaction Investigated by UV-Vis and Online FTIR Spectrophotometric Method Shi, Laishun Wang, Xiaomei Li, Na Liu, Jie Yan, Chunying ScientificWorldJournal Research Article 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 online FTIR spectrophotometric method. The initial concentrations of methyl acetoacetate, chlorine dioxide, potassium iodide, and sulfuric acid and the pH value have great influence on the oscillation observed at wavelength of 289 nm. There is a preoscillatory or induction period, and the amplitude and the number of oscillations are associated with the initial concentration of reactants. The equations for the triiodide ion reaction rate changing with reaction time and the initial concentrations in the oscillation stage were obtained. Oscillation reaction can be accelerated by increasing temperature. The apparent activation energies in terms of the induction period and the oscillation period were 26.02 KJ/mol and 17.65 KJ/mol, 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 was proposed for the oscillation reaction. The Scientific World Journal 2012-02-01 /pmc/articles/PMC3289901/ /pubmed/22454614 http://dx.doi.org/10.1100/2012/918620 Text en Copyright © 2012 Laishun Shi et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Shi, Laishun Wang, Xiaomei Li, Na Liu, Jie Yan, Chunying Chlorine Dioxide-Iodide-Methyl Acetoacetate Oscillation Reaction Investigated by UV-Vis and Online FTIR Spectrophotometric Method |
title | Chlorine Dioxide-Iodide-Methyl Acetoacetate Oscillation Reaction Investigated by UV-Vis and Online FTIR Spectrophotometric Method |
title_full | Chlorine Dioxide-Iodide-Methyl Acetoacetate Oscillation Reaction Investigated by UV-Vis and Online FTIR Spectrophotometric Method |
title_fullStr | Chlorine Dioxide-Iodide-Methyl Acetoacetate Oscillation Reaction Investigated by UV-Vis and Online FTIR Spectrophotometric Method |
title_full_unstemmed | Chlorine Dioxide-Iodide-Methyl Acetoacetate Oscillation Reaction Investigated by UV-Vis and Online FTIR Spectrophotometric Method |
title_short | Chlorine Dioxide-Iodide-Methyl Acetoacetate Oscillation Reaction Investigated by UV-Vis and Online FTIR Spectrophotometric Method |
title_sort | chlorine dioxide-iodide-methyl acetoacetate oscillation reaction investigated by uv-vis and online ftir spectrophotometric method |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3289901/ https://www.ncbi.nlm.nih.gov/pubmed/22454614 http://dx.doi.org/10.1100/2012/918620 |
work_keys_str_mv | AT shilaishun chlorinedioxideiodidemethylacetoacetateoscillationreactioninvestigatedbyuvvisandonlineftirspectrophotometricmethod AT wangxiaomei chlorinedioxideiodidemethylacetoacetateoscillationreactioninvestigatedbyuvvisandonlineftirspectrophotometricmethod AT lina chlorinedioxideiodidemethylacetoacetateoscillationreactioninvestigatedbyuvvisandonlineftirspectrophotometricmethod AT liujie chlorinedioxideiodidemethylacetoacetateoscillationreactioninvestigatedbyuvvisandonlineftirspectrophotometricmethod AT yanchunying chlorinedioxideiodidemethylacetoacetateoscillationreactioninvestigatedbyuvvisandonlineftirspectrophotometricmethod |