Design, synthesis, crystal structure and luminescent properties introduced by Eu3+ of a new type of rare-earth borophosphate CsNa2REE2(BO3)(PO4)2 (REE = Y, Gd)

2020 ◽  
Vol 49 (29) ◽  
pp. 10104-10113 ◽  
Author(s):  
Dan Zhao ◽  
Yali Xue ◽  
Ruijuan Zhang ◽  
Yanping Fan ◽  
Baozhong Liu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Luminescent Properties ◽  
Host Lattice ◽  
Concentration Quenching ◽  
Linear Arrangement ◽  
Design Synthesis ◽  
Novel Host ◽  
New Type

This work provides a novel host lattice template CsNa2REE2(BO3)(PO4)2 (REE = Y, Gd, Lu) for Eu3+ luminescence, with a linear arrangement of REE3+ ions that restricts the occurrence of concentration quenching even for fully concentrated Eu3+.

Design, synthesis, crystal structure and luminescent properties of a new tantalum-phosphate K3BiTaP3O13 with negligible concentration quenching and good thermostability

2020 ◽  
Vol 7 (3) ◽  
pp. 667-677 ◽  
Author(s):  
Dan Zhao ◽  
Yali Xue ◽  
Ruijuan Zhang ◽  
Baozhong Liu ◽  
Yanping Fan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Luminescent Properties ◽  
Concentration Quenching ◽  
High Density ◽  
New Host ◽  
Design Synthesis

This work reports a new host template, K3BiTaP3O13, for both Eu3+ and Tb3+ luminescence, providing a ‘dimensional obstacle’ to suppress negative concentration quenching with a high density of Eu3+ or Tb3+.

scholarly journals Structure, Luminescence, and Magnetic Properties of Crystalline Manganese Tungstate Doped with Rare Earth Ion

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3717
Author(s):  
Jae-Young Jung ◽  
Soung-Soo Yi ◽  
Dong-Hyun Hwang ◽  
Chang-Sik Son
Keyword(s):  
Magnetic Field ◽  
Rare Earth ◽  
Sintering Temperature ◽  
Luminescent Properties ◽  
Concentration Quenching ◽  
Rare Earth Ions ◽  
Precipitation Method ◽  
Rare Earth Ion ◽  
Co Precipitation ◽  
Quenching Phenomenon

The precursor prepared by co-precipitation method was sintered at various temperatures to synthesize crystalline manganese tungstate (MnWO4). Sintered MnWO4 showed the best crystallinity at a sintering temperature of 800 °C. Rare earth ion (Dysprosium; Dy3+) was added when preparing the precursor to enhance the magnetic and luminescent properties of crystalline MnWO4 based on these sintering temperature conditions. As the amount of rare earth ions was changed, the magnetic and luminescent characteristics were enhanced; however, after 0.1 mol.%, the luminescent characteristics decreased due to the concentration quenching phenomenon. In addition, a composite was prepared by mixing MnWO4 powder, with enhanced magnetism and luminescence properties due to the addition of dysprosium, with epoxy. To one of the two prepared composites a magnetic field was applied to induce alignment of the MnWO4 particles. Aligned particles showed stronger luminescence than the composite sample prepared with unsorted particles. As a result of this, it was suggested that it can be used as phosphor and a photosensitizer by utilizing the magnetic and luminescent properties of the synthesized MnWO4 powder with the addition of rare earth ions.

scholarly journals Preparation and luminescent properties of a rare earth borate red light-emitting material

2018 ◽  
Vol 36 (3) ◽  
pp. 359-363
Author(s):  
B. Ying ◽  
W.G. Sheng
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Solution Method ◽  
Water Solution ◽  
Red Light ◽  
Luminescent Properties ◽  
Spontaneous Crystallization ◽  
Light Emitting ◽  
Structure Morphology ◽  
Rare Earth Borate

AbstractA new hydrated rare earth borate K2O·CaO·4B2O3·12H2O:Eu was prepared by water solution method. The crystal structure, morphology, luminescence properties were investigated via XRD, IR, TG-DSC and SEM, respectively, and it was shown that one single crystal was obtained via spontaneous crystallization. The luminescent properties were also investigated by F-4600 spectrophotometer.

Crystal Structure and Luminescent Properties of Complex [Eu0.5Gd0.5(C12H9O2)2(C12H8N2)2(H2O)2]•(C12H9O2)•H2O

2012 ◽  
Vol 554-556 ◽  
pp. 691-694
Author(s):  
Hai Tao Xia ◽  
Yu Fen Liu ◽  
De Fu Rong
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Ternary Complex ◽  
Luminescent Properties ◽  
Luminescence Spectra ◽  
X Ray Diffraction ◽  
Red Emission ◽  
X Ray ◽  
Sharp Band ◽  
Complex Display

One new rare-earth ternary complex with 1-naphthylacetic acid and 1,10-phenanthroline, [Eu0.5Gd0.5(C12H9O2)2(C12H8N2)2(H2O)2]•(C12H9O2)•H2O were synthesized. The structures were established by single crystal X-ray diffraction. The europium (gadolinium) ion is eight-coordinate with four oxygen and four nitrogen atoms forming a coordination polyhedron best describable as a distorted dodecahedral. The luminescence spectra of the complex in a solution of DMF were studied. The complex display characteristic Eu(III)-originated red emission as a sharp band at 617 nm. It is concluded that the metal-centered red emission is promoted by the ligand-assisted energy transfer.

scholarly journals Structural and luminescent properties of Fe3+ doped PVA capped CdTe nanoparticles

2017 ◽  
Vol 35 (2) ◽  
pp. 390-397 ◽  
Author(s):  
K. Ravindranadh ◽  
M.C. Rao
Keyword(s):  
Crystal Structure ◽  
Blue Emission ◽  
Luminescent Properties ◽  
Host Lattice ◽  
Precipitation Method ◽  
Site Symmetry ◽  
Cell Parameters ◽  
Prepared Sample ◽  
Cdte Nanoparticles ◽  
Ft Ir

Abstract During recent decades, magnetic and semiconductor nanoparticles have attracted significant attention of scientists in various fields of engineering, physics, chemistry, biology and medicine. Fe3+ doped PVA capped CdTe nanoparticles were prepared by co-precipitation method and characterized by powder X-ray diffraction, SEM, TEM, FT-IR, optical, EPR and PL techniques to collect the information about the crystal structure, coordination/local site symmetry of doped Fe3+ ions in the host lattice and the luminescent properties of prepared sample. Powder XRD data revealed that the crystal structure belongs to a cubic system and its lattice cell parameters were evaluated. The average crystallite size was estimated to be 8 nm. The morphology of prepared samples was analyzed by using SEM and TEM investigations. Functional groups of the prepared sample were observed in FT-IR spectra. Optical absorption and EPR studies have shown that on doping, Fe3+ ions enter the host lattice in octahedral site symmetry. PL studies of Fe3+ doped PVA capped CdTe nanoparticles revealed UV and blue emission bands. CIE chromaticity coordinates were also calculated from the emission spectrum of Fe3+ doped PVA capped CdTe nanoparticles.

Crystal structure and luminescent properties of new rare earth complexes with a flexible Salen-type ligand

2007 ◽  
Vol 10 (1) ◽  
pp. 105-108 ◽  
Author(s):  
Wei Dou ◽  
Jun-Na Yao ◽  
Wei-Sheng Liu ◽  
Ya-Wen Wang ◽  
Jiang-Rong Zheng ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Rare Earth ◽  
Luminescent Properties ◽  
Rare Earth Complexes

Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

2003 ◽  
Vol 218 (5) ◽  
Author(s):  
Süheyla Özbey ◽  
F. B. Kaynak ◽  
M. Toğrul ◽  
N. Demirel ◽  
H. Hoşgören
Keyword(s):  
Crystal Structure ◽  
Inclusion Complex ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

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