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Development of highly luminescent PMMA films doped with Eu3+β-diketonate coordinated on ancillary ligand

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Abstract

In this work, [Eu(tta)3(4-picNO)2] and [Eu(dbm)3(4-picNO)] complexes were incorporated on different concentrations (x = 1, 3, 5, 10 and 15%) in PMMA polymeric matrix (4-picNO: 4-Methylpyridine N-oxide) by the solvent casting method, yielding transparent and highly luminescent polymeric films. These materials were analyzed by X-ray diffraction, scanning electron microscopy and by energy dispersive, ultraviolet–visible spectroscopy, luminescence and vacuum ultraviolet–ultraviolet spectroscopies. The luminescence spectra of doped PMMA films are in agreement with an efficient intramolecular diketonate (tta) ligand-to-europium energy transfer. Furthermore, the values of experimental intensity parameters (Ω2,4) for luminescent polymeric materials were quite similar to those ones for isolated complexes, indicating that there is a homogeneous dispersion of Eu3+ complexes in the polymeric matrix, preserving their chemical and structural features. These behavior were also observed from the CIE diagram that show great similarity between the (x,y) coordinates for the doped PMMA samples compared to the isolated β-diketonate complexes with a reddish color tuning. The photostability investigation of the doped PMMA polymeric films and Eu3+ complexes has been also reported.

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Acknowledgements

The authors thank the Brazilian Agencies: FAPESP, CAPES, CNPq, CNEN for financial support. Dr Veronica C. Teixeira, Dr Douglas Galante and Mr Leonardo M. Kofukuda (TGM beamline) from the Brazilian Synchrotron Light Laboratory, Brazilian Center for Research in Energy and Materials (LNLS and CNPEM), Campinas, SP, Brazil, are gratefully acknowledged for their assistance during vacuum UV-excited luminescence experiments.

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Authors and Affiliations

  1. Nuclear and Energy Research Institute, IPEN/USP, Sao Paulo, SP, Brazil

    L. H. C. Francisco & M. C. F. C. Felinto

  2. Institute of Chemistry, University of São Paulo, Sao Paulo, SP, Brazil

    H. F. Brito

  3. Department of Chemistry, Federal University of Paraíba, Joao Pessoa, PB, Brazil

    E. E. S. Teotonio

  4. Department of Fundamental Chemistry, Federal University of Pernambuco, Recife, PE, Brazil

    O. L. Malta

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  1. L. H. C. Francisco
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  2. M. C. F. C. Felinto
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  3. H. F. Brito
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  4. E. E. S. Teotonio
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  5. O. L. Malta
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Correspondence to M. C. F. C. Felinto.

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Francisco, L.H.C., Felinto, M.C.F.C., Brito, H.F. et al. Development of highly luminescent PMMA films doped with Eu3+β-diketonate coordinated on ancillary ligand. J Mater Sci: Mater Electron 30, 16922–16931 (2019). https://doi.org/10.1007/s10854-019-01639-9

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  • DOI: https://doi.org/10.1007/s10854-019-01639-9

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