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Calorimetry studies of a chemical oscillatory system

The effect of putrescine on KSCN-H2O2-CuSO4-NaOH reactions

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Abstract

The effect of putrescine (PUT) on KSCN-H2O2-CuSO4-NaOH oscillating system was investigated by calorimetric method. The oscillating reaction was monitored in a closed reactor with stirring, and the result showed that the oscillating period was linearly related with putrescine concentration and the numbers of oscillation decreased with increase in putrescine concentration. When [PUT]=2.83·10−4 M, no oscillation was observed. A possible mechanism is proposed that putrescine is a scavenger of the active-oxygen species. The result of numerical simulation by a simplified mechanism consisting of 18 kinetic steps and 16 variables is consistent with the experimental findings.

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Authors and Affiliations

  1. College of Chemistry and Molecular Science, Wuhan University, Wuhan, 430072, China

    S. Jingyan, L. Yuwen, L. Jie, W. Zhiyong & W. Cunxin

  2. College of Life Science, Wuhan University, Wuhan, 430072, China

    L. Yuwen

Authors
  1. S. Jingyan
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  2. L. Yuwen
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  3. L. Jie
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  4. W. Zhiyong
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  5. W. Cunxin
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Correspondence to L. Yuwen.

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Jingyan, S., Yuwen, L., Jie, L. et al. Calorimetry studies of a chemical oscillatory system. J Therm Anal Calorim 90, 761–767 (2007). https://doi.org/10.1007/s10973-006-8214-x

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  • DOI: https://doi.org/10.1007/s10973-006-8214-x

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