PEDRO LIMA FORSTER

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Effects of gamma radiation on the photoluminescence properties of polycarbonate matrices doped with terbium complex
2010 - FORSTER, P.L.; PARRA, D.F.; KAI, J.; FERMINO, D.M.; BRITO, H.F.; LUGAO, A.B.
Luminescent films containing terbium complex [Tb(acac)3(H2O)3] (acac ¼ acetylacetonate) doped into a polycarbonate (PC) matrix were prepared and irradiated at low-dose gamma radiation with ratio of 5 and 10 kGy. The PC polymer was doped with 5% (w/w) of the Tb3+ complex. The thermal behavior was investigated by utilization of differential scanning calorimetry (DSC) and thermogravimetry analysis (TGA). Changes in thermal stability due to the addition of doping agent into the polycarbonate matrix. Based on the emission spectra of PC:5% Tb(acac)3 film were observed the characteristic bands arising from the 5 D4-7 FJ transitions of Tb3+ ion (J ¼ 0–6), indicating the ability to obtain the luminescent films. Doped samples irradiated at low dose of gamma irradiation showed a decrease in luminescence intensity with increasing of the dose.
Influence of gamma irradiation on photoluminescence properties of polycarbonate films doped with Eusup(3+)-beta diketonate complex
2013 - FORSTER, PEDRO L.; PARRA, DUCLERC F.; KAI, JIANG; BRITO, HERMI F.; LUGAO, ADEMAR B.