ArticleMikrochimica acta2025
Synthesis of stable copper nanoclusters with different emission wavelengths for oxytetracycline determination.
Article in Mikrochimica acta, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Red-emitting copper nanoclusters (Cu NC-1) and orange-emitting copper nanoclusters (Cu NC-2) were prepared by using polydentate ligands bearing functional groups with different electronic effects. The decomposition temperatures of Cu NC-1 and Cu NC-2 are 573 K and 553 K. Their photoluminescence quantum yields are 15.5% and 52.7%, respectively. In the temperature range 398-498 K, the photoluminescence intensity of Cu NC-1 shows a linear relationship with temperature. A ratiometric fluorescence probe based on Cu NC-1 for determination of oxytetracycline (OTC) was constructed by introducing magnesium ions. Spectroscopic test results show that the inner filter effect leads to the emission quenching of Cu NC-1. The detection limit is 6.0 nM, and the linear range is 0-5 µM. The detection unit of this probe can also use a smartphone, with a detection limit of 0.44 µM. The recoveries for the determination of OTC in river water, tap water and milk are in the range 97.7%-103.6%.
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