Green luminescence system containing a Tb3+-β-diketonate complex doped in the epoxy resin as sensitizer

✍ Scribed by Duclerc Fernandes Parra; Adriana Mucciolo; Hermi Felinto Brito

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 117 KB
• Volume: 94
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.20771

✦ Synopsis

Abstract

Photoluminescent properties of the terbium tris(acetylacetonate)tetrahydrated [Tb(acac)~3~(H~2~O)~4~], doped in the epoxy resin, in the solid state are reported. The polymeric Tb^3+^ system and the precursor terbium complex were characterized by elemental analysis, thermogravimetry, differential scanning calorimetry, and infrared and electronic spectroscopy. The excitation and emission spectra of the samples containing the Tb^3+^ complex doped diglycidyl epoxy resin were recorded at 298 and 77 K and exhibited the characteristic bands arising from the ^5^D~4~ → ^7^F~J~ transitions (J = 6–0). The system shows an increase in the luminescence intensity with the increase in the Tb^3+^ complex in the 1, 5, and 10% concentrations due to the energy transfer from the polymer to the rare earth ion. On the other hand, the concentration quenching of luminescence of polymer doped with 15% of the Tb^3+^ complex was observed. The lifetime measurements (τ = 0.81, 0.80, 0.79, and 0.78 ms) decrease with the increase of Tb^3+^‐complex concentration (1, 5, 10, and 15%) doped in polymer. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 865–870, 2004