Synthesis, Photoluminescence and Energy Transfer of Two Novel Tb(III) Ternary Complexes

2011 ◽  
Vol 216 ◽  
pp. 502-505 ◽  
Author(s):  
Xiao Ming Ren ◽  
Chang Ping Wei ◽  
Guo Cheng
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Energy Level ◽  
Benzoic Acid ◽  
Excited States ◽  
Luminescence Intensity ◽  
Fluorescence Spectra ◽  
Uv Spectra ◽  
Ternary Complexes ◽  
Rare Earth Ion

Two novel Tb(III) ternary complexes with 2-aniline carbonyl benzoic acid (HAB) as the first ligand, imidazo [5,6-f] phenanthroline(IP) and 1,10-phenanthroline(phen)as the secondary ligands were synthesized. The structures of the ligands and Tb(III) complexes were confirmed by elemental analysis, IR spectra and UV spectra. The fluorescence spectra suggested that the luminescence intensity of Tb(HAB)3IP was obviously higher. Further investigation showed that HAB was the donor of energy, IP and phen which functioned as “energy ladder” could transfer the energy in the system of ternary complexes. If this “energy ladder” was located suitable, it could bridge the energy level difference between the triplet state of first ligand and excited states of rare earth ion .So, the intramolecular energy could transfer efficiently to central Tb3+ ion and competitive luminescence of HAB was also reduced.

Enhanced Fluorescence Emission of Bonding Type Rare Earth Complexes Eu(MAA)3Phen

2017 ◽  
Vol 898 ◽  
pp. 1839-1843 ◽  
Author(s):  
Bin Wang ◽  
Lu Lu Xiao ◽  
Heng Xue Xiang ◽  
Bin Sun ◽  
Mei Fang Zhu
Keyword(s):  
Rare Earth ◽  
Fluorescence Spectra ◽  
Central Atom ◽  
Fluorescence Emission ◽  
Ion Concentration ◽  
Luminescent Materials ◽  
Enhanced Fluorescence ◽  
Rare Earth Ion ◽  
Element Analysis ◽  
Phenanthroline Monohydrate

Rare earth fluorescent complexes monomer with activated double bonds was synthesized by using Eu as the central atom, Methacrylic acid and 1, 10-Phenanthroline monohydrate as ligand. The structure of resultant Eu (MAA)3Phen was determined by infrared spectrum, ultraviolet spectrum and element analysis, and the fluorescence property of the complexes was tested by fluorescence spectra and fluorescence microscopy. Compared with conventional luminescent materials, this resultant complexes show greater fluorescence intensity. The analysis has revealed that with the increase of rare earth ion concentration from 4×10-5mol·L-1 to 4×10-3mol·L-1, the fluorescence quenching phenomenon appeared in the complexes solution.

Synthesis, Characterization and Property of Nano Rare Earth Terbium Complex with Gatifloxacin

2014 ◽  
Vol 541-542 ◽  
pp. 185-189 ◽  
Author(s):  
Yu Guang Lv ◽  
Li Zhang ◽  
Kui Lin Lv ◽  
Shu Jing Zhou ◽  
Du A ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Fluorescence Spectra ◽  
Uv Light ◽  
Earth Metal ◽  
Rare Earth Complex ◽  
Main Peak ◽  
Terbium Complex ◽  
Element Analysis ◽  
Spectra Analysis

Rare earth metal complexes have special characteristics, such as extremely narrow emission bands and high internal quantum efficiencies, which are suitable to be used as the emission materials, chemistry and biological technology. Ternary nano complex of terbium gatifloxacin phenanthroline was synthesized.The composition and structure of ternary complex were characterized by element analysis, Mass Spectrometry (MS), UltraViolet Absorption Spectrometry (UV) and fluorescence spectra(FS). The influences of solubility, thermal stability and luminescent properties of complex as well as addition of phenanthroline secondary ligands on the fluorescence spectra of the ternary complexes were studied. The results of fluorescence spectra analysis showed that partial energy was transferred from Characterization to terbium ions by intramolecular energy transfer processes, meanwhile, the addition of phenanthroline can effectively increase the luminescence intensity of terbium icons. The complex possessed well luminescence and showed characteristic emission peaks of Tb3+ under UV light excitation and emitted strong green fluorescence. Moreover, in an ITO/PVK/Tb(GFLX)3Phen/Al device, Tb3+ ion can be excited by intramolecular ligand-to-metal energy transfer process. The main peak of emission at 545 nm is attributed to 5D0→7F2 transition of the Tb3+ ion, and this process results in the enhancing green emission. Biological actrivity properties of the rare earth complex was well studied.

Energy transfer between shallow centers and rare-earth ion cores:Er3+ion in silicon

2000 ◽  
Vol 61 (8) ◽  
pp. 5369-5375 ◽  
Author(s):  
T. Gregorkiewicz ◽  
D. T. X. Thao ◽  
J. M. Langer ◽  
H. H. P. Th. Bekman ◽  
M. S. Bresler ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Rare Earth Ion

ENERGY-TRANSFER PROCESS IN RARE-EARTH-ION DOPED SrTiO3

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3924-3927 ◽  
Author(s):  
SHINJI OKAMOTO ◽  
SHOSAKU TANAKA ◽  
HAJIME YAMAMOTO
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Temperature Dependence ◽  
Oscillator Strength ◽  
Transfer Process ◽  
Emission Intensity ◽  
Energy Transfer Process ◽  
Rare Earth Ions ◽  
Rare Earth Ion ◽  
Pl Spectra

Enhancement of emission intensity of rare-earth-ion doped SrTiO 3 by Al addition has been investigated. In the case of Pr 3+ and Tb 3+, addition of 23-mol% Al intensifies emission by more than 200 times. In contrast, the addition of 20 mol% Al intensifies emission at most by three times in the case of other rare-earth ions. The temperature dependence of PL spectra shows that the energy transfer from carriers to Pr 3+ or Tb 3+ ions is much more efficient than that to other rare-earth ions in SrTiO 3. It can be speculated that the energy transfer in SrTiO 3: Pr 3 or Tb 3+ occurs from carriers to Pr 3+ or Tb 3+ ion via 4f-5d transitions, which are much higher in oscillator strength than 4f-4f transitions.

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