Luminescence of Eu(tta)3(N-picNO)2 (N=2, 3 and 4) doped PMMA films under Synchrotron radiation
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2021
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INTERNATIONAL CONFERENCE ON LUMINESCENCE, 19th
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Since their discovery, trivalent lanthanide β-diketonate complexes often stand out
among luminescent coordination compounds [1]. Thus, the incorporation of such
complexes into polymeric materials proposes increased photostability, optical quality,
and processing conditions [2]. In this work, we prepared and doped the luminescent
Eu(tta)3(N-picNO)2 (N=2, 3 and 4) complexes into Poly(methyl methacrylate) (PMMA)
films via the solvent casting method, yielding transparent materials under visible light.
These amorphous materials (XRD) presented considerable thermal stability up to
300°C (TGA), and their spectroscopic properties with ancillary ligand exchange were
investigated by luminescence spectroscopy in the UV-Vis and Vacuum-UV energy
range by synchrotron radiation. Mainly, Eu3+ transitions (5D0→7F0-4) were observed in
the emission spectra for all compounds, with intense monochromatic-like red (614 nm)
emission (Fig. 1), indicating efficient intramolecular energy transfer. Experimental
intensity parameters and quantum yields were also determined, where it is seen the
influence on the positioning of the methyl group in the luminescence efficiency.
Como referenciar
FRANCISCO, L.H.C.; MOREIRA, R.P.; BRITO, H.F.; TEOTONIO, E.E.S.; MALTA, O.L.; FELINTO, M.C.F.C. Luminescence of Eu(tta)3(N-picNO)2 (N=2, 3 and 4) doped PMMA films under Synchrotron radiation. In: INTERNATIONAL CONFERENCE ON LUMINESCENCE, 19th, July 26-30, 2021, Changchun, China. Abstract... Disponível em: http://repositorio.ipen.br/handle/123456789/32674. Acesso em: 19 Apr 2024.
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