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Luminescent silicone materials containing Eu3+-complex for photonic applications


Luminescent materials obtained through encapsulation of rare-earth (RE3+) complexes in different solid materials, are constantly aimed at many scientific researches because of their broad range of applications in optoelectronics, luminescent solar concentrators, solid-state laser, biomedicine, and sensors. Several materials have been explored as host of optically active species for photonic applications, however, silicones based materials are weakly exploited as optical materials due to its intrinsic properties, such as highly hydrophobicity (water free) and difficult to control reaction kinetics to avoid bubbles and cracks. Although these drawbacks, silicones can be obtained as bulk or films, showing broadly visible transparency, mechanical flexibility, thermal and chemical stabilities. In this work, we report the synthesis and investigation of a set of highly red emissive [Eu(tta)3(H2O)2]-doped silicone samples obtained by incorporation of [Eu(tta)3(H2O)2] complex during the hydrosilylation reaction between D4Vi and D4H cyclic silicone monomers. Bulk samples were successfully obtained with different Eu3+-complex concentrations and characterized by TG, DSC, FT-IR, Raman, absorption, photoluminescence (excitation, emission and lifetime) and the Judd-Ofelt intensity parameters were determined and discussed. The novel luminescent silicone based material is promising for photonic applications because of its strong visible luminescence and fair mechanical and thermal stability, providing a new practical approach for optical materials by the interesting chemical features of the silicone host combined with the highly luminescence of RE3+-complex. As a practical application, we demonstrated the potentiality of the [Eu(tta)3(H2O)2]-doped silicone materials as luminescent sensor or dosimeter of UV-light by evaluating its luminescent properties as a function of the tta ligand photodegradation when exposed to UV-light.

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Publication details

The article was received on 16 Apr 2018, accepted on 09 Jul 2018 and first published on 09 Jul 2018

Article type: Paper
DOI: 10.1039/C8TC01798K
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Luminescent silicone materials containing Eu3+-complex for photonic applications

    D. Manzani, K. Nigoghossian, M. F. Iastrenski, G. R. Coelho, M. V. dos Santos, L. J. Q. Maia, S. J. Ribeiro and M. G. Segatelli, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC01798K

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