It has been shown by single crystal X-ray diffraction analysis that the salicylideneimine fragment of TpPyLn(sch)2(H2O) (Ln = Eu, Tb; TpPy– = tris(3-[2′-pyridyl]pyrazolyl)borate; schH = p-schH, m-schH are carboxylate Schiff bases prepared by the reaction of 4- and 3-aminobenzoic acids, respectively, with salicylaldehyde) is not coordinated to the metal ion. The obtained Tb3+ complexes exhibit ligand-centered emission, while in the luminescence spectra of Eu3+ compounds narrow bands of characteristic emission of Eu3+ are also observed. It is found that when the complexes are irradiated with UV light, the transformations of carboxylate ligands in the coordination compounds occur.
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The work was carried out with the partial financial support of a grant from the National Research Foundation of Ukraine (project 2020.02/0202).
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Translated from Teoretychna ta Eksperymentalna Khimiya, Vol. 58, No. 6, pp. 364-370, November-December, 2022.
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Mikhalyova, E.A., Borysova, K.V., Goreshnik, E.A. et al. Spectral and Luminescence Properties of Mixed-Ligand Eu3+ and Tb3+ Complexes with tris(3-[2′-pyridyl]-pyrazolyl)borate and Carboxylates Containing an N-Salicylideneimine Fragment. Theor Exp Chem 58, 409–416 (2023). https://doi.org/10.1007/s11237-023-09756-7
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DOI: https://doi.org/10.1007/s11237-023-09756-7