Abstract
The stability constants of the complexes of europium(III) and terbium(III) ions with terephthalic acid anions were determined by potentiometric titration over a wide pH range. The luminescent properties of these complexes were studied. It was shown that the complexes are most stable in slightly acidic solutions. Analysis of the photoluminescence emission spectra confirmed the adequacy of the proposed model of complexation.
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ACKNOWLEDGMENTS
The measurements were performed in the Research Park of Saint-Petersburg State University (Magnetic Resonance Research Centre, Chemical Analysis and Materials Research Centre, Cryogenic Department, Interdisciplinary Resource Centre for Nanotechnology, Centre for X-ray Diffraction Studies, Centre for Optical and Laser Materials Research, Thermogravimetric and Calorimetric Research Centre, and Centre for Innovative Technologies of Composite Nanomaterials).
Funding
This work was supported by the Russian Science Foundation under grant no. 22-73-10040, https://rscf.ru/en/project/22-73-10040/.
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Saitov, Y.E., Guseva, P.B., Toikka, Y.N. et al. Complexation of Europium(III) and Terbium(III) Ions with Terephthalic Acid in Aqueous Solutions. Russ J Gen Chem 94, 591–599 (2024). https://doi.org/10.1134/S1070363224030101
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DOI: https://doi.org/10.1134/S1070363224030101