摘要
Rare earth(Ⅲ)diphenyl-4-amine sulfonates(RE(DAS)3·xH2O,RE=Eu^3+,Tb^3+)phosphors were synthesized by precursor method from barium diphenyl-4-amine sulfonate and rare earth sulfates.FTIR,TG/DSC coupled to mass spectrometry(TG/DSC/MS),X-ray powder diffraction(XPD),scanning electron microscopy(SEM)and photo luminesce nce(PL)spectroscopy were utilized to structurally and morphologically characterize the samples.Thermal decomposition of Eu(DAS)3·7H2O and Tb(DAS)3·2H2O at 973 K under dynamic air atmosphere results in crystalline Eu2O2SO4 and Tb2O2SO4 materials,respectively.Accordingly,MS spectra reveal the liberation of thermal decomposition products of precursors,largely as CO2,NO2 and SO2 gases.The diphenyl-4-amine sulfonate(DAS)ligand demonstrats a good stabilizing property for Eu^3+and Tb^3+ions.The Eu(DAS)3·7H2O and Tb(DAS)3·2H2O compounds display efficient red and green emissions,under UV excitation,arising from the 5D0→7FJ(J=0-4)and 5D4→7FJ(J=0-6)transitions of the Eu^3+and Tb^3+ions,respectively.
Rare earth（Ⅲ） diphenyl-4-amine sulfonates(RE（DAS）3·xH2O,RE=Eu3+,Tb3+)phosphors were synthesized by precursor method from barium diphenyl-4-amine sulfonate and rare earth sulfates.FTIR,TG/DSC coupled to mass spectrometry（TG/DSC/MS）,X-ray powder diffraction（XPD）,scanning electron microscopy（SEM） and photo luminesce nce（PL） spectroscopy were utilized to structurally and morphologically characterize the samples.Thermal decomposition of Eu（DAS）3·7H2O and Tb（DAS）3·2H2O at 973 K under dynamic air atmosphere results in crystalline Eu2O2SO4 and Tb2O2SO4 materials,respectively.Accordingly,MS spectra reveal the liberation of thermal decomposition products of precursors,largely as CO2,NO2 and SO2 gases.The diphenyl-4-amine sulfonate（DAS） ligand demonstrats a good stabilizing property for Eu3+ and Tb3+ ions.The Eu（DAS）3·7H2O and Tb（DAS）3·2H2O compounds display efficient red and green emissions,under UV excitation,arising from the 5D0→7FJ（J=0-4） and 5D4→7FJ（J=0-6） transitions of the Eu3+ and Tb3+ ions,respectively.
基金
Project supported by Higher Education Personnel Improvement Coordination(CAPES),Laboratory of Thermal Analysis Prof.Ivo Giolito(LATIG-USP),Laboratory of f-block Elements(Leb-f)USP,Petroleum Nucleus(LABPETRO-UFES)of Federal University of Espirito Santo,Institute of Low Temperature and Structure Research and the Polish Academy of Sciences
