Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/49939
Título: | A luminescent europium ionic liquid to improve the performance of chitosan polymer electrolytes |
Autor(es): | Leones, Rita Daniela Barros Reis, P. M. Sabadini, R. C. Ravaro, Leandro P. Silva, I. D. A. Camargo, Andrea S. S. de Donoso, J. P. Magon, C. J. Esperança, J. M. S. S. Pawlicka, A. Silva, Maria Manuela |
Palavras-chave: | Europium(III) Luminescent materials Solid polymer electrolytes Ionic liquid Photoluminescence spectroscopy |
Data: | 9-Abr-2017 |
Editora: | Elsevier |
Revista: | Electrochimica Acta |
Resumo(s): | Ionically conductive and luminescent chitosan solid polymer electrolytes (SPEs) were prepared through the solvent casting method and characterized with respect to their thermal behavior, morphology, structure, ionic conductivity, optical, and photophysical properties. The characterization was performed by analysis of differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), complex impedance and photoluminescence spectroscopies. The chitosan-SPEs were doped with different quantities of 1-ehtyl-3-methylimidazolium europium(III) tetrathiocyanate ([C2mim][Eu(SCN)4]). The chitosann[C2mim][[Eu(SCN)4] membranes exhibited a semicrystalline morphology and good thermal stability (Tonset 134 C). The sample with the highest ionic conductivity was the chitosan4[C2mim][Eu(SCN)4] with 1.34 10 5 and 1.97 10 4 S. cm 1 at 30 and 80 C, respectively. The photoluminescence analysis showed intense red emission corresponding to the 5 D0!7 D2 transition, as it is typical for Eu3+ luminescent materials. The chitosan0.5[C2mim][Eu(SCN)4] sample emitted red luminescence with a lifetime of 0.397 ms. The chitosan1[C2mim][Eu(SCN)4] exhibited the best equilibrium between the membrane’s optical and photophysical features. These results encourage future investigations of these materials for application in electroluminescent devices. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/49939 |
DOI: | 10.1016/j.electacta.2017.04.042 |
ISSN: | 0013-4686 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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EA 240 (2017) 474-485.pdf Acesso restrito! | 5,59 MB | Adobe PDF | Ver/Abrir |