Light-triggered redox activity of GdYVO 4 :Eu 3+ nanoparticles.

S L Yefimova,P O Maksimchuk,K O Hubenko, V V Omielaieva,N S Kavok,V K Klochkov,Yu V Malyukin,V P Semynozhenko

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY（2020）

Cited 8|Views29

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Abstract

Light-triggered redox activity of small (d = 2 nm) GdYVO4:Eu3+ nanoparticles (NPs) in aqueous solutions and lipid suspensions is reported. It has been revealed that depending on pre-treatment conditions (exposure to UV light or storage in the dark) the same NPs exhibit pro- or anti-oxidant properties. Pro-/anti-oxidant activity in aqueous solutions was evaluated by UV-vis spectroscopy using probe molecules for hydroxyl radicals (center dot OH) and superoxide anions (O-2(center dot)-). Lipid oxidation under the effect of NPs has been also analyzed. Multi-functional GdYVO4:Eu3+ NPs are assumed to be a new theranostic agent in cancer therapy, which exhibit fluorescent properties. triggered redox activity and drug-carrier ability. (C) 2020 Elsevier B.V. All rights reserved.

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Key words

Nanoparticles,UV irradiation,Light-triggered redox activity,Hydroxyl radical,Superoxide anion,Radical scavenging

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