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Master's Dissertation
DOI
https://doi.org/10.11606/D.85.2010.tde-18052012-102828
Document
Author
Full name
Pedro Lima Forster
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Parra, Duclerc Fernandes (President)
Felinto, Maria Claudia França da Cunha
Stefani, Roberval
Title in Portuguese
Estudo fotoluminescente de filmes de policarbonato(PC) e poli(9- vinicarbazol) (PVK) dopados com complexo de európio
Keywords in Portuguese
európio
luninescência
matrizes
poli(9-vinilcarbazol)
policarbonato
Abstract in Portuguese
Polímeros dopados com complexos de terras raras são materiais vantajosos na produção de filmes para várias aplicações no campo da luminescência. Neste estudo de polímeros luminescentes obtidos a partir de polímeros como o policarbonato (PC) e o poli(9-vinilcarbazol) (PVK), os filmes dopados com o complexo diaquatris (tenoiltrifluoroacetonato) de európio (III) [Eu(tta)3(H2O)2] foram preparados e suas propriedades térmicas e luminescentes no estado sólido relatadas. O comportamento térmico foi investigado por uso de calorimetria diferencial exploratória (DSC) e análise termogravimétrica (TGA). Devido à adição de complexo terras raras [Eu(tta)3(H2O)2] na matriz de PC e PVK, foram observadas alterações no comportamento térmico, relativo à transição vítrea e estabilidade térmica. As emissões finas características do íon Eu3+ decorrentes das transições 5DO7FJ (J = 0-4) indicaram a incorporação de íons de Eu3+ nos polímeros. Os filmes mostraram que a intensidade de emissão luminescente aumenta com o aumento da concentração de terras raras na matriz polimérica acompanhado por uma diminuição na estabilidade térmica.
Title in English
Photoluminescent study of polycarbonate (PC) and poly(9-vinylcarbazole) (PVK) doped films with europium complex
Keywords in English
carbazones
doped materials
europium complexes
films
photoluminescence
polycarbonates
polymers
polyvinyls
rare earth complexes
Abstract in English
Polymers doped with rare earth complexes are advantaged in film production for many applications in the luminescent field. In this study luminescent polymer obtained from polycarbonate (PC) and poly (9-vinylcarbazole) films doped with diaquatris (thenoyltrifluoroacetonate) europium (III) complex [Eu(tta)3(H2O)2] were prepared and their calorimetric and luminescent properties in the solid state are reported. The thermal behavior was investigated by differential scannig calorimetry (DSC) and thermogravimetry analysis (TGA). Due of the addition of rare earth [Eu(tta)3(H2O)2] into PC and PVK matrices, changes were observed in the thermal behavior concerning the glass transition and thermal stability. Characteristic broadened narrow bands arising from de 5DO7FJ transitions (J = 0-4) of Eu3+ ion indicate the incorporation of the Eu3+ ions into those polymers. The luminescent films show enhancement emission intensity with an increase in the rare earth concentration in polymeric matrix accompanied by decrease in thermal stability.
 
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2010ForsterEstudo.pdf (1.49 Mbytes)
Publishing Date
2012-05-30
 
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