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Photophysical Properties of New Terbium (III) Organophosphonates

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Abstract

This paper reports on the synthesis, characterization and photophysical properties of the Tb3+ organophosphonates, TbH(O3PR)2, methylphosphonate (R=CH3), ethylphosphonate (R=C2H5), propylphosphonate (R=C3H7), and phenylphosphonate (R=C6H5). The layered Tb3+ organophosphonates were characterized by X-ray diffraction, IR spectroscopy, TG and elemental analysis. The interlayer distances of the Tb3+ organophosphonates evaluated by the X-ray diffractogram were 9.50 Å for TbH(O3PCH3)2, 12.18 Å for TbH(O3PC2H5)2, 14.84 Å for TbH(O3PC3H7)2 and 15.20 Å for TbH(O3PC6H5)2. The Tb3+ luminescence data revealed highly green emissive materials when they were excited at 368 nm, where the characteristic 5D4 → 7F J (J=6, 5, 4 and 3) transitions of Tb3+ were observed at 488, 543, 585 and 619 nm, respectively. The lifetime of the Tb3+ 5D4 → 7F5 transition (λexc=368 nm and λem=543 nm) for the Tb3+ organophosphonates was evaluated from the decay curves, which values were of 2.88, 2.22, 2.14 and 2.59 ms, respectively for TbH(O3PCH3)2, TbH(O3PC2H5)2, TbH(O3PC3H7)2 and TbH(O3PC6H5)2. TG analysis revealed that these materials are thermally highly stable, with no water molecule in their composition, which makes them potential luminophores.

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Acknowledgements

CNPq, CAPES and FAPESP.

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Authors and Affiliations

  1. D. Química, Universidade Federal de São Carlos, Rodovia Washington Luiz, km 235, CEP 13560-970, São Carlos, SP, Brasil

    Ieda Lúcia Viana Rosa, Ana Valéria Santos de Lourenço & Cláudio Roberto Neri

  2. D. Química da FFCLRP, Universidade de São Paulo, Av. Bandeirantes, 3900, CEP 14040-901, Ribeirão Preto, SP, Brasil

    Osvaldo Antonio Serra

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  1. Ieda Lúcia Viana Rosa
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  2. Ana Valéria Santos de Lourenço
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  3. Cláudio Roberto Neri
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  4. Osvaldo Antonio Serra
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Correspondence to Cláudio Roberto Neri.

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Rosa, I.L.V., de Lourenço, A.V.S., Neri, C.R. et al. Photophysical Properties of New Terbium (III) Organophosphonates. J Fluoresc 16, 455–459 (2006). https://doi.org/10.1007/s10895-006-0078-8

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  • DOI: https://doi.org/10.1007/s10895-006-0078-8

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