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A kinetic study of the enhancement of solution chemiluminescence of glyoxylic acid oxidation by manganese species
Author(s) -
Otamonga JeanPaul,
AbdelMageed Amal,
Agater Irena B.,
Jewsbury Roger A.
Publication year - 2015
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2768
Subject(s) - permanganate , chemistry , manganese , chemiluminescence , glyoxylic acid , autocatalysis , formaldehyde , inorganic chemistry , kinetics , aqueous solution , reaction mechanism , nuclear chemistry , catalysis , chromatography , organic chemistry , quantum mechanics , physics
In order to study the mechanism of the enhancement of solution chemiluminescence, the kinetics of the decay of the oxidant and the chemiluminescence emission were followed for oxidations by permanganate, manganese dioxide sol and Mn 3+ (aq) of glyoxylic acid, using stopped‐flow spectrophotometry. Results are reported for the glyoxylic acid oxidized under pseudo first‐order conditions and in an acidic medium at 25 °C. For permanganate under these conditions, the decay is sigmoidal, consistent with autocatalysis, and for manganese dioxide sol and Mn 3+ it is pseudo first order. The effects of the presence of aqueous formaldehyde and Mn 2+ were observed and a fit to a simple mechanism is discussed. It is concluded that chemiluminescent enhancement in these systems is best explained by reaction kinetics. Copyright © 2014 John Wiley & Sons, Ltd.