Deactivation of singlet oxygen by cerium oxide nanoparticles

[Display omitted] •Ceria nanoparticles inhibit the photobleaching process of crown-substituted phthalocyanines.•Ceria nanoparticles possess the ability to deactivate reactive oxygen species.•Photoprotective properties of ceria nanoparticles depend on their size and their lattice parameter.•Ceria nan...

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Bibliographic Details
Published in:Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2019-09, Vol.382, p.111925, Article 111925
Main Authors: Shekunova, Taisiya O., Lapkina, Lyudmila A., Shcherbakov, Alexander B., Meshkov, Ivan N., Ivanov, Vladimir K., Yu. Tsivadze, Aslan, Gorbunova, Yulia G.
Format: Article
Language:English
Subjects:
Aluminum
Cerium
Cerium oxide nanoparticles
Cerium oxides
Deactivation
Gallium
Indium
Irradiation
Nanoparticles
Oxygen
Photobleaching
Photosensitizer
Phthalocyanine
Reactive oxygen species
Shielding
Singlet oxygen
Ultraviolet radiation
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Summary:[Display omitted] •Ceria nanoparticles inhibit the photobleaching process of crown-substituted phthalocyanines.•Ceria nanoparticles possess the ability to deactivate reactive oxygen species.•Photoprotective properties of ceria nanoparticles depend on their size and their lattice parameter.•Ceria nanoparticles demonstrate UV-shielding properties. The influence of cerium oxide nanoparticles on singlet oxygen generation upon photosensitizer irradiation was studied. Solutions of tetra-15-crown-5-phthalocyanines (aluminium(III), gallium(III) and indium(III) hydroxide, 1Al, 1Ga, 1In) in DMSO were used as photosensitizers. Ceria nanoparticles (CNPs) were shown to inhibit the photobleaching process of the crown-phthalocyanines induced by UV and visible irradiation of these photosensitizers. The photoprotective properties of CNPs were shown to depend on their size and lattice parameter, with these in turn being determined by conditions of CNPs’ synthesis. In addition, the deactivation of the reactive oxygen species and the UV-shielding effect of ceria nanoparticles were demonstrated.
ISSN:1010-6030
1873-2666
DOI:10.1016/j.jphotochem.2019.111925