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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Eco-Friendly Luminescent Hybrid Materials Based on Eu-III and Li-I Co-Doped Chitosan

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Autor(es):
Alves, Raquel [1] ; Ravaro, Leandro P. [2] ; Pawlicka, Agnieszka [3] ; Silva, Maria Manuela [1] ; de Camargo, Andrea S. S. [2]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Minho, Ctr Quim, P-4710057 Braga - Portugal
[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
[3] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Journal of the Brazilian Chemical Society; v. 26, n. 12, p. 2590-2597, DEC 2015.
Citações Web of Science: 6
Resumo

Biopolymer-based materials have been of particular interest as alternatives to synthetic polymers due to their low toxicity, biodegradability and biocompatibility. Among them, chitosan is one of the most studied ones and has recently been investigated for the application as solid state polymer electrolytes. Furthermore, it can serve as a host for luminescent species such as rare earth ions, opening up the possibility of combined electro-optical functionality, of particular interest for electroluminescent devices. In this study, we perform a fundamental, initial, investigation of chitosan based luminescent materials doped with Eu-III and Li-I triflate salts, from the structural, photophysical and conducting points of view. Because the host presents a broad emission band in the blue to green, while Eu-III emits in the red, fine-tuning of emission colour and/or generation of white light is proven possible, by proper combination of optimized composition and excitation scheme. Europium lifetimes (D-5(0)) are in the range 270-350 mu s and quantum yields are up to 2%. Although LiI does not interfere with the luminescent properties, it grants ion-conducting properties to the material suggesting that a combination of both properties could be useful in the development of electro-luminescent devices. (AU)

Processo FAPESP: 13/24727-7 - Novos materiais ópticos baseados Èm complexos polinucleares dè clusters dè haleto dè cobre(I) imobilizados Èm matrizes hospedeiras sólidas
Beneficiário:Leandro Piaggi Ravaro
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
Beneficiário:Edgar Dutra Zanotto
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs