What is it about?
Quantum yields are determined for luminol and FeII in the chemiluminescence of luminol initiated by FeII salt solutions. It is concluded that chemiluminescence is initiated not by superoxide anion but by a more efficient primary oxidant.
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Why is it important?
The quenching of chemiluminescence under the action of dimethyl sulfoxide shows that the hydroxyl radical also cannot be a primary oxidant. It is established that the effect the chelation of FeII by EDTA has on chemiluminescence is not related to loss of the initiating action of FeIIEDTA in the luminol chemiluminescence. Instead, it is associated with its quick transformation into FeIIIEDTA when preparing a mixture of FeII and EDTA-Na2.
Perspectives
It is likely that the primary oxidant of luminol constitutes labile iron(IV) forms, rather than the hydroxyl radical or superoxide anion.
Yurii Tsaplev
Emanuel institute of biochemical physics, RAS
Read the Original
This page is a summary of: Chemiluminescence of Luminol Initiated by Iron(II) Ions, Russian Journal of Physical Chemistry A, May 2022, Pleiades Publishing Ltd,
DOI: 10.1134/s0036024422050284.
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