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Optical and Thermal Stability of Oligofluorene/Rubber Luminescent Blend

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Abstract

This paper proposes to obtain homogeneous and stable blends of oligo(9,9-dioctylfluorene)-co-phenylene (OF), a conjugated oligomer with strong tendency of formation of excimers in the solid state, and nitrile rubber (NBR). This rubber protection reduces the formation of polymer excimers in the films. The fluorene oligomer was synthesized via Suzuki reaction and incorporated in the nitrile rubber. The films were formed by spin coating and casting techniques on the proportions of 1, 5, 10, 20 and 50 % (w/w) of OF in the nitrile rubber (NBR). The structural, optical and thermal properties of the films were evaluated with infrared, UV–Vis, fluorescence and thermogravimetry, respectively. The nitrile rubber proved to be essential for the preparation of homogeneous and stable films, since it was not possible to obtain films with only fluorene using the above-mentioned techniques. Furthermore, luminescent properties of OF are unchanged and the excimers formation in the solid state decrease suggesting the efficiency of nitrile rubber as the matrix for making films.

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Acknowledgments

The authors gratefully acknowledge Coordenação de Aperfeiçoamento de Pessoal de Ensino Superior (CAPES) – Rede NanoBioNet; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP 2007/50742-2), Instituto Nacional de Eletrônica Orgânica (INEO) – INCT-CNPq and CNPq process no. 401109/2014-3.

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Authors and Affiliations

  1. Laboratory of Hybrid Materials, Federal University of São Paulo, Diadema, SP, Brazil

    Camila G. Barbosa & Laura O. Péres

  2. Laboratory of Polymeric and Biosorbent Materials, Federal University of São Carlos, Araras, SP, Brazil

    Roselena Faez

Authors
  1. Camila G. Barbosa
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  2. Roselena Faez
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  3. Laura O. Péres
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Correspondence to Laura O. Péres.

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Barbosa, C.G., Faez, R. & Péres, L.O. Optical and Thermal Stability of Oligofluorene/Rubber Luminescent Blend. J Fluoresc 26, 1679–1684 (2016). https://doi.org/10.1007/s10895-016-1858-4

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  • DOI: https://doi.org/10.1007/s10895-016-1858-4

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