resumo
Biopolymer-based materials have particular interest and they are alternatives to synthetic polymers based on the decreasing oil resources. In this report they may be viewed as innovative materials for optics area. The incorporation of Eu3+ into natural macromolecules hosts with purpose of producing highly efficient emitting phosphors is of widespread interest in materials science, due to their important roles in display devices. This paper describes studies of the DNA and europium triflate luminescent membranes and its potential technological applications are expanded to electroluminescent devices. The most conductive sample of DNA(50)Eu, exhibited an ionic conductivity equal to 1.02 x 10(-4) S cm(-1) and 1.55 x 10(-3) S cm(-1) at 25 degrees C and 90 degrees C, respectively. Techniques like DSC, XRD and POM, demonstrated that the inclusion of the guest salt does not change significantly the amorphous nature morphology of the samples. Moreover, the overall redox stability of 2.0 V was an indication that this material has an acceptable stability window for an application in a solid state electrochemical devices. (C) 2013 Elsevier B.V. All rights reserved.
palavras-chave
FLEXIBLE DNA FILMS; POLYMER ELECTROLYTES; IONIC-CONDUCTIVITY; ELECTROCHROMIC DEVICES; PLASTICIZED CHITOSAN; EUROPIUM PICRATE; SOLID-STATE; GELATIN; LIQUIDS; NANOCOMPOSITES
categoria
Chemistry; Electrochemistry
autores
Leones, R; Rodrigues, LC; Fernandes, M; Ferreira, RAS; Cesarino, I; Pawlicka, A; Carlos, LD; Bermudez, VD; Silva, MM
nossos autores
Luís Carlos
Professor Catedrático
Maria Rute de Amorim e Sá Ferreira André
Professor CatedráticoProjectos
agradecimentos
The authors are pleased to acknowledge the financial support provided by the University of Minho and the Fundacao para a Ciencia e Tecnologia and FEDER-COMPETE FCT-Portugal (contracts project, Pest-C/QUI/UI0686/2011, Pest-C/CTM/LA0011/2013 and PTDC/CTM-BPC/112774/2009), for laboratory equipment and research staff. R. Leones thanks FCT for grant SFRH/BD/90366/2012. The authors are also indebted to CNPq, FAPESP and CAPES, for the financial support given to this research. The authors thank F. Sentanin for providing experimental data. M.M. Silva acknowledges FAPESP and SFRH/BSAB/1312/2013 for financial support given for this research.