Investigation on the formation of highly luminescent β-diketone-Ln(III)-EDTA water-soluble complexes
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2019
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Journal of Luminescence
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Three new β-diketone–Ln-EDTA (β-diketone=TTA, BTFA, ACAC; Ln=Eu3+ and Tb3+) water-soluble complexes
were prepared, and their photophysical properties were investigated in aqueous solutions and compared
with the Eu–EDTA complex. A very strong red and green luminescence was observed by the addition of ligands
to the aqueous solutions of the Eu–EDTA and Tb–EDTA complexes, respectively, due to the formation of watersoluble
β-diketone–Ln–EDTA complexes. To confirm the formation and stoichiometry of the new β-
diketone–Ln–EDTA complex, the Judd–Ofelt intensity parameters Ω2 for Eu3+ complexes and the band width at
half height (Δλ) for Tb3+ complexes were used. The dependence of these parameters on the addition of the β-
diketone strongly suggests that only one β-diketonate ligand is in the first coordination sphere of the β-
diketone–Ln–EDTA complexes. These new Eu3+ and Tb3+ systems may act as red and green optical markers for
bioassay or bioimaging.
Como referenciar
SILVA, HARYANE R.M.; FAUSTINO, WAGNER M.; TEOTONIO, ERCULES E.S.; BRITO, HERMI F.; MALTA, OSCAR L.; FELINTO, MARIA C.F.C. Investigation on the formation of highly luminescent β-diketone-Ln(III)-EDTA water-soluble complexes. Journal of Luminescence, v. 207, p. 182-187, 2019. DOI: 10.1016/j.jlumin.2018.10.021. Disponível em: http://repositorio.ipen.br/handle/123456789/30439. Acesso em: 14 May 2024.
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