Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 2125 - 2136 (1981)
Update date:2022-08-29
Topics:
Eriksen, Trygve E.
Lind, Johan
Merenyi, Gabor
The pH-dependent rection rate between luminol and chlorine dioxide has been determined.The net oxidation reaction proceeds in two steps.The first of these is the formation of a luminol-ClO2 adduct.This adduct, which is unreactive towards oxygen, reacts rapidly with itself or with a second ClO2 molecule.The final product has a broad absorbance between 450 and 650 nm.An identical absorbance is produced when luminol is oxidized by HOCl.The species displaying this absorbance is very reactive towards OH- and undissociated luminol.In the presence of hydrogen peroxide and pH > 7 the absorbance disappears.At the same time an intense chemiluminescence is observed, the decay of which is quantitatively in agreement with the decay of the 450-650 nm absorbance.From these findings it is concluded that the oxidation product of luminol with ClO2 is 5-aminophtalazine-1,4-dione.
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