Chemiluminescence during the oxidation of homogentisic acid

Tsaplev, Yu. B.

doi:10.1134/s003602441107034x

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…Scavenging the

{ROO}^{∙}

radicals results in the chemiluminescence quenching followed by the recovery of the light‐emission intensity (after certain induction period depending of the scavenger concentration) upon gradual consumption of the introduced tar‐borne antiradical reactant. For our purpose, the kinetics of the chemiluminescence recovery is most informative because it depends decisively on the sought‐for strength of the radical scavenger (the stronger the scavenger, the steeper the recovery time profile) . The very left curve in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…As before , most of the chemiluminescence measurements were performed with the Hamamatsu photosensor module H7467 supplied with the RS‐232C interface. To probe for the existence of more than one chemiluminescence‐emitting species, whose contributions to the overall light‐emitting process may be time dependent, a novel approach has been harnessed. The latter methodology affords the spectral kinetic information with minimal losses in sensitivity.…”

Section: Methodsmentioning

confidence: 99%

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Chemiluminescence of Cigarette Smoke: Salient Features of the Phenomenon

Fedorova

Menshov

Trofimov

et al. 2017

Photochem & Photobiology

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The study disclosed herein provides for the first time a detailed experimental support for the general mechanism of the cigarette-smoke-derived chemiluminescence, as an example par excellence of the excited-state generation in a chemically complex aerosol medium. The mechanism involves chemiexcitation in a unimolecular transformation of the smoke-borne free radical species. However, the concentration of these radicals, [r∙], obeys a bimolecular (second-order) kinetics and depends on a particulate-phase content (total particulate matter, TPM) of the cigarette smoke. The decrease in [r∙] with increasing the TPM amount manifests radical-scavenging propensity of the smoke particulate phase. Astonishingly, no energy transfer takes place from the primary excited light-emitting species to luminophoric molecules abundant in the smoke. The reported results build up fundamentals of a facile chemiluminescence assay for free radical properties of the smoke. The experimental approaches developed for this study are of general scope and may be used for mechanistic elucidation of the excited-state generation in chemical systems and environments of an arbitrary complexity.

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“…Scavenging the

{ROO}^{∙}

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Chemiluminescence of Cigarette Smoke: Salient Features of the Phenomenon

Fedorova

Menshov

Trofimov

et al. 2017

Photochem & Photobiology

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Efficient chemiluminescence of luminol in the presence of hemin without added hydrogen peroxide†

Tsaplev,

Trofimov

2024

Photochem & Photobiology

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The results reported herein demonstrate for the first time that typical reducing agents in an alkaline medium initiate chemiluminescence of luminol in the presence of hemin, and the efficiency of their action is comparable to that of hydrogen peroxide and exceeds it in the case of the superoxide anion. The pertinent implications of these findings refer to new possibilities for developing chemiluminescence assays and biosensors and to precautions for determining hydrogen peroxide using luminol and hemin in samples of unknown composition, most prominently, of biological origin.

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