A kinetic treatment of stopped-flow time courses for multiple chemiluminescence of the KIO sub(4)-luminol-Mn super(2+) system

Stopped-flow time courses for chemiluminescence (CL) of the KIO sub(4)-luminol-Mn super(2+) system showed an instantaneous jump in initial signal followed by two distinct bands. A kinetic model of the form [Formulaomitted] with ten adjustable parameters was proposed to account for CL intensity (I) v...

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Bibliographic Details
Published in:Luminescence (Chichester, England) England), 2013-05, Vol.28 (3), p.355-362
Main Authors: Ma, Ai-Jay, Chang, Yu-Tang, Lin, Wann-Yin
Format: Article
Language:English
Subjects:
Adjustable
Bands
Chemiluminescence
Decay
Emission analysis
Mathematical models
Reproduction
Simulation
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Summary:Stopped-flow time courses for chemiluminescence (CL) of the KIO sub(4)-luminol-Mn super(2+) system showed an instantaneous jump in initial signal followed by two distinct bands. A kinetic model of the form [Formulaomitted] with ten adjustable parameters was proposed to account for CL intensity (I) versus time (t) profiles. The three terms in the model represent the three CL bands. Each band was comprised of a rise part and an exponential decay corresponding to the formation and deactivation of the CL emitter. CL bands could have originated from different CL pathways with the participation of reactive species such as O sub(2) super(-), super( times )OH and super(1)O sub(2) generated in the reactions involving IO sub(4) super(-), O sub(2) and Mn super(2+). Subsequent reactions of these reactive species with luminol induced CL emissions. Simulation parameters together with peak positions and intensities of the three CL bands were found to vary in different manners by changing conditions such as reagent concentration, pH and temperature. The temperature-dependence of the rate constants yielded activation energies of 73.2 plus or minus 2.8, 70.1 plus or minus 2.4 and 67.2 plus or minus 1.2 kJmol super(-1) for the three decay processes. Moreover, different substances exhibited a significant influence on the three CL bands and their simulation parameters. The numerous parameters and characteristics of CL emissions could serve as multiple probes for detecting analytes, making this system promising for potential analytical applications. Copyright [copy 2012 John Wiley & Sons, Ltd.
ISSN:1522-7235
1522-7243
DOI:10.1002/bio.2389