ISSN:
0894-3230
Schlagwort(e):
peroxyoxalate reaction intermediate
;
chemiluminescent decomposition
;
kinetics
;
Chemistry
;
Theoretical, Physical and Computational Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
The peroxyoxalate system undergoes one of the most efficient chemiluminescence reactions and is the only one considered to involve an intermolecular chemically initiated electron exchange luminescence mechanism, with proven high efficiency. Several reactive intermediates have been proposed, which, upon interaction with a fluorescent activator, lead to excited-state generation. The synthesis and spectral characterization of 4-chlorophenyl O,O-hydrogen monoperoxyoxalate (1), a compound analogous to one of the proposed reactive intermediates, was recently reported. Here the results of a kinetic study on the chemiluminescent decomposition of this peracid 1, catalyzed by oxygen bases (potassium hydroxide, potassium tert-butoxide and potassium p-chlorophenolate) or nitrogen bases [pyridine, imidazole and 1,8-bis(dimethylamino)naphthalene] are presented. Based on the dependence of the observed rate constants on the base concentration, kinetic schemes are proposed for the catalyzed decomposition of 1 and rate constants are assigned to specific reaction steps. The results obtained with the nitrogen bases give further support in favor of 1,2-dioxetane dione as the reactive intermediate in the peroxyoxalate reaction. © 1997 John Wiley & Sons, Ltd.
Zusätzliches Material:
7 Ill.
Materialart:
Digitale Medien
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