Synthesis of novel europium complexes and their photoluminescence properties

2012 ◽  
Vol 30 (1) ◽  
pp. 17-20 ◽  
Author(s):  
Linfang SHI ◽  
Yanwei LI ◽  
Huaru CAO ◽  
Ying GUAN ◽  
Yongchun MA
Keyword(s):  
Photoluminescence Properties ◽  
Europium Complexes

Photoluminescence Properties of Europium Complexes Encapsulated into MSBA-15

2013 ◽  
Vol 760-762 ◽  
pp. 483-486
Author(s):  
Su Wen Li ◽  
Ming Yue
Keyword(s):  
Crystal Field ◽  
Relative Intensity ◽  
Electron Transition ◽  
Emission Lines ◽  
Photoluminescence Properties ◽  
Europium Complexes ◽  
The Eu ◽  
Eu Complexes ◽  
Pure Complex

The Eu complexes-Eu (TTA)3phen (TTA: thenoyltrifluoroacetone, phen: 1,10-phenanthroline) were encapsulated, uniformly distributed into the channels of the modified SBA-15 (labeled with MSBA-15), and structurally characterized. The photoluminescence properties of the encapsulated complexes were systematically studied in contrast to the pure complexes. The results indicate that the excitation bands assigned to the π-π* electron transition of the ligands for Eu3+complexes in encapsulated complexes were split into different components, and the5D0-7F0transitions became partly allowed. The emission lines for the5D0-7F2transitions became broader and the relative intensity for different crystal field components varied greatly in comparison to the pure complex. Most importantly, the photostability and thermostability of the emissions improved considerably.

Synthesis and Photoluminescence Properties of Doped Europium Complexes with 2-Pyrazinecarboxylate

2011 ◽  
Vol 399-401 ◽  
pp. 963-966
Author(s):  
Hai Xia Zhang ◽  
Rui Jun Ma ◽  
Hai Bin Chu ◽  
Ming Yan Zhao ◽  
Ying Nan Chen ◽  
...  
Keyword(s):  
Low Cost ◽  
Lanthanide Ions ◽  
Quantum Yields ◽  
Luminescence Spectra ◽  
Intramolecular Energy Transfer ◽  
Dsc Analysis ◽  
Practical Application ◽  
Photoluminescence Properties ◽  
Europium Complexes ◽  
Strong Luminescence

Seven europium complexes of 2-pyrazinecarboxylate (pyca) doped with inert fluorescent lanthanide ions (La3+, Y3+) have been synthesized. Elemental analysis, IR spectroscopy, absorption spectroscopy and TG-DSC analysis showed that the complexes have the formulas of Eu(pyca)3•3H2O and EuxRE1-x(pyca)3•3H2O (RE=La, Y; x = 0.7,0.5,0.3), respectively. The lanthanide ions coordinated with carboxylic oxygen atoms and nitrogen atoms of pyca. Luminescence spectra and luminescence life-times of the complexes have been measured and their quantum yields were calculated. The results showed that the existence of La3+and Y3+ions could enhance the luminescence intensity and quantum yield of the europium complexes, which may arise from the intramolecular energy transfer between the inert fluorescent lanthanide ions and Eu3+ion. Those doped complexes have the advantages of strong luminescence, low cost and practical application value.

Preparation and photoluminescence properties of functionalized silica materials incorporating europium complexes

2011 ◽  
Vol 33 (10) ◽  
pp. 1548-1552 ◽  
Author(s):  
A.V.S. Lourenço ◽  
C.A. Kodaira ◽  
E.R. Souza ◽  
M.C.F.C. Felinto ◽  
O.L. Malta ◽  
...  
Keyword(s):  
Functionalized Silica ◽  
Photoluminescence Properties ◽  
Europium Complexes ◽  
Silica Materials

Preparation, Characterization and Photoluminescence Properties of Ternary Europium Complexes Eu(DBM)3 bath Encapsulated into Aluminosilicate Zeolites

2008 ◽  
Vol 8 (8) ◽  
pp. 3959-3966 ◽  
Author(s):  
Huihui Liu ◽  
Hongwei Song ◽  
Suwen Li ◽  
Xinguang Ren ◽  
Shaozhe Lu ◽  
...  
Keyword(s):  
Luminescent Properties ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
Europium Complexes ◽  
X Ray ◽  
Zeolite L ◽  
Transmission Electron ◽  
Adsorption Of Water ◽  
Field Symmetry ◽  
The Eu

To modify the photoluminescence properties the Eu(DBM)3 bath complexes were encapsulated into the sub-nanometer pores of aluminosilicates zeolites L and Yand characterized by X-ray diffraction (XRD), transmission electron micrographs (TEM), Fourier transform infrared spectroscopy (FTIR) and ultraviolet-visible (UV-vis) absorption spectra. The luminescent properties of the encapsulated composites (Eu-L and Eu-Y) were systematically studied. The results indicate that in both the two composites the crystal-field symmetry becomes lower, as a consequence, the 5D0-7F2 electronicdipole transition relative to the 5D0-7F1 magnetic-dipole transition of Eu3+ increases in contrast to the pure complexes. The outer quantum efficiency of the Eu3+ emission and the photostability of Eu3+ are both improved considerably. The adsorption of water in the composites has influence on the thermostability and decay dynamics of the Eu3+ emission. In the composite Eu-L, which contains less water the thermostability of luminescence is improved considerably and the lifetime becomes longer in comparison to the pure complexes. Overall, zeolite L is a more ideal host material for modification of lanthanide complexes.

Effects of Support and Ligand on the Photoluminescence Properties of Siliceous Grafted Europium Complexes

2009 ◽  
Vol 113 (14) ◽  
pp. 5784-5791 ◽  
Author(s):  
C. Tiseanu ◽  
V. I. Parvulescu ◽  
M. U. Kumke ◽  
S. Dobroiu ◽  
A. Gessner ◽  
...  
Keyword(s):  
Photoluminescence Properties ◽  
Europium Complexes

Dimensionally-Controlled Hydrothermal Tm3+-doped Oxidic Nanocrystals and Their Photoluminescence Properties

2010 ◽  
Vol 1247 ◽  
Author(s):  
Rocío Calderón-Villajos ◽  
Carlos Zaldo ◽  
Concepción Cascales
Keyword(s):  
Single Crystals ◽  
Fluorescence Lifetimes ◽  
Photoluminescence Properties ◽  
Reaction Conditions ◽  
Hydrothermal Processes ◽  
Bulk Single Crystals ◽  
Template Free ◽  
Reaction Media

AbstractControlled reaction conditions in simple, template-free hydrothermal processes yield Tm-Lu2O3 and Tm-GdVO4 nanocrystals with well-defined specific morphologies and sizes. In both oxide families, nanocrystals prepared at pH 7 reaction media exhibit photoluminescence in ∼1.95 μm similar to bulk single crystals. For the lowest Tm3+ concentration (0.2 % mol) in GdVO4 measured 3H4 and 3F4 fluorescence lifetimes τ are very near to τrad.

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