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Kvantovaya Elektronika, 2012, Volume 42, Number 8, Pages 687–692 (Mi qe14860)  

This article is cited in 2 scientific papers (total in 2 papers)

Interaction of laser radiation with matter. Laser plasmas

Laser photolysis of fluorone dyes in a chitosan matrix

E. A. Slyusarevaa, A. G. Sizykha, M. A. Gerasimovaa, V. V. Slabkoa, S. A. Myslivetsb

a Siberian Federal University, Krasnoyarsk
b L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk

Abstract: Kinetics of laser-induced photobleaching of fluorone dyes (fluorescein, dibromofluorescein, eosin Y, erythrosin B, Rose Bengal) is studied in a chitosan matrix. For all dyes the bleaching kinetics at the intensities of laser radiation 0.7 — 11.9 W cm-2 demonstrates quasi-monomolecular behaviour. The results are analysed using a kinetic model, based on the four-level (S0, S1, T1, Tn) scheme of the dye with chemically active triplet states taken into account. It is shown that the rate constants of the chemical reaction involving higher triplet states in the dyes studied amount to (3.9 — 18.6) × 106 s-1 and exceed the analogous values for the reaction involving the first lower triplet states by nine orders of magnitude. The rate of reaction involving the first triplet states appeared to be higher by one — two orders of magnitude than that in the case of higher triplet states involved because of low population of the latter. The possible mechanism of dye bleaching with participation of chitosan that consists in reduction of the dye to the leuco form by transfer of hydrogen from the chitosan matrix is discussed.

Keywords: laser photolysis, fluorescein, dibromofluorescein, eosin Y, erythrosin B, Rose Bengal, chitosan, photobleaching kinetics, twostep absorption.

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English version:
Quantum Electronics, 2012, 42:8, 687–692

Bibliographic databases:

PACS: 82.50.-m, 42.55.Mv
Received: 12.04.2012

Citation: E. A. Slyusareva, A. G. Sizykh, M. A. Gerasimova, V. V. Slabko, S. A. Myslivets, “Laser photolysis of fluorone dyes in a chitosan matrix”, Kvantovaya Elektronika, 42:8 (2012), 687–692 [Quantum Electron., 42:8 (2012), 687–692]

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  • http://mi.mathnet.ru/eng/qe/v42/i8/p687

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    Citing articles on Google Scholar: Russian citations, English citations
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    This publication is cited in the following articles:
    1. Maximiliano Arbeloa E., Mario Previtali C., Graciela Bertolotti S., ChemPhysChem, 19:8 (2018), 934–942  crossref  isi  scopus
    2. Merezhko A.G., Gerasimova M.A., Gornostaev L.M., Tropina D.A., Slyusareva E.A., Proceedings of Spie, 10614, eds. Tarasenko V., Kabanov A., Spie-Int Soc Optical Engineering, 2018, UNSP 1061423  crossref  isi  scopus
  • Квантовая электроника Quantum Electronics
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