Mechanism of permanganate chemiluminescence

Hindson, Christopher M., Francis, Paul S., Hanson, Graeme R, Adcock, Jacqui L. and Barnettlt, Neil W. (2010) Mechanism of permanganate chemiluminescence. Analytical Chemistry, 82 10: 4174-4180. doi:10.1021/ac100363s

Author Hindson, Christopher M.
Francis, Paul S.
Hanson, Graeme R
Adcock, Jacqui L.
Barnettlt, Neil W.
Title Mechanism of permanganate chemiluminescence
Journal name Analytical Chemistry   Check publisher's open access policy
ISSN 0003-2700
Publication date 2010-05-01
Sub-type Article (original research)
DOI 10.1021/ac100363s
Volume 82
Issue 10
Start page 4174
End page 4180
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract Spectroscopic and synthetic methods have been exploited to deduce the mechanism for acidic potassium permanganate chemiluminescence. We have employed electron paramagnetic resonance (EPR) spectroscopy with a continuous flow assembly to monitor the formation of radical intermediates in real time generated from substrate oxidation by manganese(VII). These transient species react with manganese(III) in solution to produce the previously characterized manganese(II)* emission source. Using UV−vis, EPR, attenuated total reflection (ATR)-FT-IR, and chemiluminescence spectroscopies, we have established that there are two distinct enhancement mechanisms that in combination afford a 50-fold increase in emission intensity when the reaction is conducted in the presence of phosphate oligomers. In addition to preventing disproportionation of the manganese(III) precursor, the phosphate oligomers form protective “cagelike” structures around the manganese(II)* emitter, thus preventing nonradiative relaxation pathways. Copyright © 2010 American Chemical Society
Keyword Acidic potassium permanganate
Asorbic acid
Injection analysis
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
Centre for Advanced Imaging Publications
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Created: Sun, 30 May 2010, 10:08:00 EST