Abstract
Silver nanoparticles modified with Eu3+ ions increase the intensity of the fluorescence signal by a factor of 125 in an analytical system containing doxycycline as a result of a combination of resonance and exchange–resonance mechanisms of excitation energy transfer. Using a model system, a complex of doxycycline with Tb3+ ions, the role of energy transfer from silver nanoparticles to the doxycycline ion in the formation of an analytical signal was revealed and evaluated. A fluorimetric procedure for the determination of 1.0 × 10–8–1.0 × 10–5 M of doxycycline was developed based on the formation of an antibiotic complex with Eu3+ ions in the presence of silver nanoparticles. The calibration equation is y = 5.0 × 107x + 10; R2 = 0.996.
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This work was supported by the Russian Science Foundation, project no. 21-13-00267.
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Translated by O. Zhukova
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Smirnova, T.D., Zhelobitskaya, E.A. & Danilina, T.G. Effect of Plasmon Resonance of Silver Nanoparticles on the Fluorescent Properties of Doxycycline. J Anal Chem 77, 1000–1004 (2022). https://doi.org/10.1134/S1061934822080147
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DOI: https://doi.org/10.1134/S1061934822080147