학술논문
Morphological tuning of Eu2 O2 S nanoparticles, manifestation of peroxidase-like activity and glucose assay use.
Document Type
Article
Author
Source
Subject
*EUROPIUM compounds synthesis
*CHEMICAL decomposition
*NANOPARTICLE synthesis
*PEROXIDASE
*THIOCARBOXYLATES
*CYCLOPENTENES synthesis
*GLUCOSE synthesis
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Language
ISSN
1144-0546
Abstract
Eu2O2S nanoparticles have been synthesized by solvothermal decomposition of the precursor complex [NHEt3]+[Eu(acda)4]−, wherein acda− is the anion of 2-aminocyclopentene-1-dithiocarboxylic acid. Oleylamine alone or in combination with surface active agents, such as trioctylphosphine or oleic acid, at 280 °C produced nanoparticles of three different morphologies, namely, ultrathin nanoplates, nanospheres and short rods. The optical band energy of the nanoparticles has been found to be 4.57(8) eV. Eu2O2S particles exhibit strong photoluminescence at room temperature with a quantum yield of about 4% upon excitation at 285 nm. All three forms display peroxidase-like activity towards the oxidation of 3,3′,5,5′-tetramethylbenzidine in the presence of H2O2 and follow a Michaelis–Menten enzymatic pathway. The mechanistic investigation reveals that the Eu3+/Eu2+ redox couple plays a crucial role behind this catalytic process. Catalytic efficiency of the nanoparticles decreases in the order plates > spheres > rod-like particles. Based on peroxidase activity, selective detection and estimation of glucose in the presence of related carbohydrates has been carried out. [ABSTRACT FROM AUTHOR]