Insights in Analytical Electrochemistry Open Access

Photoluminescence properties and thermal investigation by TG-MS of RE(DAS)3∙xH2O, [RE = Eu3+, Tb3+]

Joint Event:8^th Annual Congress on Analytical and Bioanalytical Techniques & 14^th International Conference and Exhibition on Pharmaceutical Formulations

August 28-30, 2017 Brussels, Belgium

Rodrigo V Rodrigues, Lukasz Marciniak, Latif U. Khan, Robert Tomala, Hermi F. Brito, Jivaldo R. Matos, Wieslaw Strek

S�£o Paulo University, Brazil
INTIBS, Wroclaw, Poland

Posters & Accepted Abstracts: Insights Anal Electrochem

Abstract:

The complex rare earth diphenyl-4-amine sulfonate RE(DAS)3�xH2O RE = [Eu3+, Tb3+] were synthesized by precursor method and characterization by photoluminescence (PL), FTIR, TG-MS, DRX and SEM. The luminescence spectra of Eu(DAS)3�7H2O and Tb(DAS)3�2H2O complexes were measured at room temperature, and the thermoanalytical study was performed in dynamic air atmosphere, using TG-MS technique. The thermal investigation shows that in dynamic air atmosphere, the oxysulfates Eu2O2SO4 and Tb2O2SO4 were obtained at approximately 973 K from the thermal decomposition of Eu(DAS)3�7H2O and Tb(DAS)3�2H2O complexes, respectively. The PL of Eu(DAS)3�7H2O show emission spectrum with groups of narrow emission bands assigned to the 5D0�7FJ transitions (where J = 0�4), dominated by the abnormal high intensity 5D0�7F4 one (685.2 and 692.8 nm), while the emission spectrum of Tb(DAS)3�2H2O complex shows narrow emission peaks with the most intense one at 545.4 nm due to 5D4�7F5 transition. In this currently work, the FTIR, DRX, MEV, thermal investigation TG/DTG/MS and photoluminescent properties was applied in the characterization and study of RE(DAS)3�H2O RE = [Eu3+, Tb3+] complexes.

Biography :

Rodrigo Rodrigues It develops materials using the TG/DTG/DSC Thermal Analysis Techniques and TG/MS in the part of obtaining and characterizing the application of thermogravimetry to obtain nanomaterials and luminescent materials, studying kinetic methods (Ozawa) in determining the time of life of compounds. And in the study of photoluminescence applications of the excitation and emission spectra of the luminescence of rare earth elements RE. Has work with colaborations of São Paulo University USP – Brazil, Turku University – Finland and Institute of Low Temperature of Wroclaw – INTIBS – Poland