| Synthesis,photoluminescence properties and thermal investigation by TG-MS of RE(DAS)_3·xH_2O(RE=Eu~(3+),Tb~(3+)) |
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| 摘 要： | Rare earth(Ⅲ) diphenyl-4-amine sulfonates(RE(DAS)_3·xH_2O,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)_3·7H_2O and Tb(DAS)_3·2H_2O at 973 K under dynamic air atmosphere results in crystalline Eu_2O_2SO_4 and Tb_2O_2SO_4 materials,respectively.Accordingly,MS spectra reveal the liberation of thermal decomposition products of precursors,largely as CO_2,NO_2 and SO_2 gases.The diphenyl-4-amine sulfonate(DAS) ligand demonstrats a good stabilizing property for Eu~(3+) and Tb~(3+) ions.The Eu(DAS)_3·7H_2O and Tb(DAS)_3·2H_2O compounds display efficient red and green emissions,under UV excitation,arising from the ~5D_0→~7F_J(J=0-4) and ~5D_4→~7F_J(J=0-6) transitions of the Eu~(3+) and Tb~(3+) ions,respectively.
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| 收稿时间： | 26 September 2018 |
Synthesis,photoluminescence properties and thermal investigation by TG-MS of RE(DAS)3·xH2O (RE = Eu3+, Tb3+) |
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| Authors: | Rodrigo V Rodrigues ?ukasz Marciniak Latif U Khan Antônio AL Marins Robert Tomala Emanuel JB Muri Jivaldo R Matos Wies?aw Str?k |
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| Affiliation: | 1. Institute of Chemistry, University of São Paulo, Butantã 748, 26077 São Paulo, Brazil;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland;3. Brazilian Nanotechnology National Laboratory (LNNano–CNPEM), Campinas 13083-100, São Paulo, Brazil;4. Department of Chemistry, Federal University of Espirito Santo, Vitoria 29220-000, Brazil |
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| Abstract: | 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 photoluminescence (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. |
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| Keywords: | Corresponding author Institute of Chemistry University of São Paulo Butantã 748 26077 São Paulo Brazil Optical properties Rare earth oxysulfate Thermal decomposition Rare earths |
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