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Na2Y3Cl3[TeO3]4: Synthesis, Crystal Structure and Spectroscopic Properties of the Bulk Material and its Luminescent Eu3+-doped Samples

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Published/Copyright: June 2, 2014
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Zeitschrift für Naturforschung B
From the journal Zeitschrift für Naturforschung B Volume 69 Issue 2

Colorless, platelet-shaped single crystals of Na2Y3Cl3[TeO3]4 were synthesized by a reaction of Y2O3 and TeO2 (molar ratio 3 : 8) in evacuated silica ampoules within five days at 775 °C with an excess of NaCl added as flux and reagent. The new quintenary compound crystallizes in the monoclinic space group C2/c with the lattice parameters a = 2380:69(14), b = 552:76(3), c = 1662:48(9) pm, β = 134:045(3)° and Z = 4. The crystal structure presents one of the rare oxotellurates(IV) containing isolated [TeO3]2− units, which could be verified by Raman spectroscopy. Doping with Eu3+ (3 mass-%) at the Y3+ sites in eightfold oxygen coordination leads to a strong orange-red luminescence of Na2Y3Cl3[TeO3]4:Eu3+ under UV excitation with a wavelength of λ = 254 nm. Beyond the electronic Eu3+ transitions of the 4 f 6 state, the fluorescence excitation spectrum shows an intense broad charge-transfer band resulting from both O2−→Eu3+ ligand-to-metal charge-transfer (LMCT) as well as electronic Eu3+ d→f and Te4+s→p transitions. The emission spectrum features the prominent f→f transitions of Eu3+-doped oxidic compounds. The optical band gaps of the undoped and doped samples were determined by diffuse reflectance spectroscopy revealing just minimal doping effects on the crystal structure. The optical band gaps could be assigned in the excitation spectrum in the charge-transfer broad-band region supporting the assumption of an inorganic antenna effect of the Te4+ cations.

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Na2Y3Cl3[TeO3]4: Synthesis, Crystal Structure and Spectroscopic Properties of the Bulk Material and its Luminescent Eu3+-doped Samples

Na2Y3Cl3[TeO3]4: Synthesis, Crystal Structure and Spectroscopic Properties of the Bulk Material and its Luminescent Eu3+-doped Samples

Keywords: Yttrium; Oxotellurates(IV); Crystal Structures; Spectroscopy; Eu3+ Luminescence
Received: 2013-9-30
Published Online: 2014-6-2
Published in Print: 2014-2-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

Articles in the same Issue

  1. Materials Chemistry and Light
  2. Fluorescence-active Waveguides by the Sol-Gel Method. Theory and Application
  3. Optical Spectroscopy and Crystal Field Studies of the Mn4+ Ion (3d3) in the Double Perovskite NaLaMgTeO6
  4. Na2Y3Cl3[TeO3]4: Synthesis, Crystal Structure and Spectroscopic Properties of the Bulk Material and its Luminescent Eu3+-doped Samples
  5. Preparation and Characterization of Transparent, Photoluminescent MgAl2O4:Eu2+ Ceramics
  6. Energy Recovery from Lu2O3:Tb,Hf Ceramic Storage Phosphors
  7. Understanding Persistent Luminescence: Rare-Earth- and Eu2+-doped Sr2MgSi2O7
  8. Synthesis and Optical Properties of Li3Ba2La3(MoO4)8:Sm3+ Powders for pcLEDs
  9. Development of Nd3+-doped Monoclinic Dimolybdates La2Mo2O9 as Optical Materials
  10. Synchrotron Radiation Study of Interconfigurational 5d-4f Luminescence of Pr3+ in KLuP2O7
  11. Efficient Red Emission from Europium Chelate-Silicone Host-Guest Hybrids
  12. Transparent CuInS2 PMMA Nanocomposites Luminescent in the Visible and NIR Region
  13. Functionalization of Sol-Gel Zirconia Composites with Europium Complexes
  14. Red (Eu3+), Green (Tb3+) and Ultraviolet (Gd3+) Emitting Nitrilotriacetate Complexes Prepared by One-step Synthesis
  15. Photoluminescent Tetrazolate-based Eu(III) Complexes: An Outstanding Impact of Aromatic Phosphine Oxide Co-ligands on the Photoluminescence Quantum Yields
  16. Tb2(bpdc)3 and Eu2(bpdc)3 Nanoparticles (bpdc: 2,2ʹ-Bipyridine-4,4ʹ- dicarboxylate) and Their Luminescence
  17. 1,3-Thiazole as Suitable Antenna Ligand for Lanthanide Photoluminescence in [LnCl3(thz)4]·0.5thz, Ln = Sm, Eu, Gd, Tb, Dy
  18. Bidirectional Photoinduced Energy Transfer in Nanoassemblies of Quantum Dots and Luminescent Metal Complexes
  19. ERRATUM
https://doi.org/10.5560/znb.2014-3274
Keywords for this article
Yttrium; Oxotellurates(IV); Crystal Structures; Spectroscopy; Eu3+ Luminescence

Articles in the same Issue

  1. Materials Chemistry and Light
  2. Fluorescence-active Waveguides by the Sol-Gel Method. Theory and Application
  3. Optical Spectroscopy and Crystal Field Studies of the Mn4+ Ion (3d3) in the Double Perovskite NaLaMgTeO6
  4. Na2Y3Cl3[TeO3]4: Synthesis, Crystal Structure and Spectroscopic Properties of the Bulk Material and its Luminescent Eu3+-doped Samples
  5. Preparation and Characterization of Transparent, Photoluminescent MgAl2O4:Eu2+ Ceramics
  6. Energy Recovery from Lu2O3:Tb,Hf Ceramic Storage Phosphors
  7. Understanding Persistent Luminescence: Rare-Earth- and Eu2+-doped Sr2MgSi2O7
  8. Synthesis and Optical Properties of Li3Ba2La3(MoO4)8:Sm3+ Powders for pcLEDs
  9. Development of Nd3+-doped Monoclinic Dimolybdates La2Mo2O9 as Optical Materials
  10. Synchrotron Radiation Study of Interconfigurational 5d-4f Luminescence of Pr3+ in KLuP2O7
  11. Efficient Red Emission from Europium Chelate-Silicone Host-Guest Hybrids
  12. Transparent CuInS2 PMMA Nanocomposites Luminescent in the Visible and NIR Region
  13. Functionalization of Sol-Gel Zirconia Composites with Europium Complexes
  14. Red (Eu3+), Green (Tb3+) and Ultraviolet (Gd3+) Emitting Nitrilotriacetate Complexes Prepared by One-step Synthesis
  15. Photoluminescent Tetrazolate-based Eu(III) Complexes: An Outstanding Impact of Aromatic Phosphine Oxide Co-ligands on the Photoluminescence Quantum Yields
  16. Tb2(bpdc)3 and Eu2(bpdc)3 Nanoparticles (bpdc: 2,2ʹ-Bipyridine-4,4ʹ- dicarboxylate) and Their Luminescence
  17. 1,3-Thiazole as Suitable Antenna Ligand for Lanthanide Photoluminescence in [LnCl3(thz)4]·0.5thz, Ln = Sm, Eu, Gd, Tb, Dy
  18. Bidirectional Photoinduced Energy Transfer in Nanoassemblies of Quantum Dots and Luminescent Metal Complexes
  19. ERRATUM
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