Luminescence enhancement of Eu(III) or Tb(III) complexes with organic ligands by Ln(III) (Ln  Y, La, Gd, Lu)

Li, Wenlian; Li, Weili; Yu, Gui; Wang, Qingrong; Jin, Rongjie

doi:10.1016/0925-8388(93)90177-o

Cited by 15 publications

(4 citation statements)

References 6 publications

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“…Results show that the luminescence of the polyelectrolytes at 77 K reaches a maximum for [NaY x Eu 1 - x (tstm)] n (Y:Eu = 1:4 at 1 mM Eu III ) and is even more intense than that of the most intense monomer, Na[Eu(dsp) 2 ], under analogous conditions. The enhanced luminescence of the mixed-metal polyelectrolytes is analogous to the so-called antenna or photon-harvesting effect observed for polymers, , lanthanide supramolecular compounds, , and mixed lanthanide complexes in solution 15 or in sol−gels is a slightly different twist on this energy transfer situation.…”

Section: Introductionmentioning

confidence: 77%

“…The enhanced luminescence of the mixed-metal polyelectrolytes is analogous to the so-called antenna or photon-harvesting effect observed for polymers, 48,49 lanthanide supramolecular compounds, 34,35 and mixed lanthanide complexes in solution 15 or in sol-gels. 50 Luminescence sensitization of europium(III) by terbium(III) 51 is a slightly different twist on this energy transfer situation.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Linear Luminescent Schiff-Base Polyelectrolytes with Europium(III) in the Backbone^1a

Chen

Archer

1996

Macromolecules

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The first luminescent linear europium(III) Schiff-base polyelectrolytes with europium in the polymer backbone have been synthesized and characterized. Europium-containing polyelectrolytes with ligand triplet states at or above the 5D0 state of europium luminesce with high quantum yields, consistent with the intramolecular energy-transfer mechanism established for europium(III) complexes. New [NaY(tstm)] n polyelectrolytes, where tstm4- is the anionic ligand derived from N,N‘,N‘‘,N‘‘‘-tetrasalicylidene-3,4,3‘,4‘-tetraaminodiphenylmethane, were synthesized with n values (up to 21 600) based on NMR end-group analysis. Intrinsic viscosities provide Mark−Houwink constants of a = 0.52 and K = 0.066 cm3/g for [NaY(tstm)] n . Mixed-metal [NaY x Eu1 - x (tstm)] n polyelectrolytes provide enhanced emission over [NaEu(tstm)] n . The intensity is most enhanced for polyelectrolytes with Y:Eu ratios between 1:2.5 and 1:9, probably by intrachain energy transfer from the yttrium units of the polyelectrolytes to the EuIII ions. [NaY0.2Eu0.8(tstm)] n (Y:Eu = 1:4) luminesces more strongly than any other compound investigated and has a quantum yield of 0.74 at 77 K.

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Section: Introductionmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Linear Luminescent Schiff-Base Polyelectrolytes with Europium(III) in the Backbone^1a

Chen

Archer

1996

Macromolecules

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“…It is possible to determine by spectrofluorimetry simultaneously traces of samarium and europium, , or even of a ternary mixture of samarium, europium, and terbium. , The method can also be adapted for analysis by flow injection spectrofluorimetry. , The most often used β-diketone in analytical determination of europium or samarium is 2-thenoyltrifluoroacetone (Htta), ,− because this ligand is known to form strongly luminescent complexes with europium(III), although also other β-diketones have been investigated. For determination of terbium(III), it is more advisable to use benzoate complexes, because these are much more luminescent than the tris(β-diketonato)terbium(III) complexes. − Tetracyclines can be detected by europium luminescence in micellar solutions. − By adding sodium dodecyl sulfate to solution containing [Eu(dpa) 3 ] 3- or [Tb(dpa) 3 ] 3- , the detection limit was hardly changed, but the linear dynamic range could be extended to higher concentrations . It has been illustrated that lanthanide luminescence in micellar solutions can be used to detect additives such as benzoic acid, terephthalic acid, or saccharin in soft drinks. , The luminescence enhancement by topo of lanthanide complexes with trimesic acid was found to depend strongly on the pH .…”

Section: Analytical Applicationsmentioning

confidence: 99%

Lanthanide-Containing Liquid Crystals and Surfactants

2002

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Christiane Görller-Walrand was born in Brussels, Belgium, in 1943. She is a Professor of Chemistry at the Catholic University of Leuven. She obtained her M.S. (1965) and Ph.D. (1969) in Chemistry at the Catholic University of Leuven. She was chairperson of the First International Conference on f-Elements (ICFE-1, Leuven, 1990). Her research interests include coordination chemistry, the spectroscopy of lanthanides and actinides, and MCD spectroscopy. Koen Binnemans was born in Geel, Belgium, in 1970. He obtained his M.S. (1992) and Ph.D. (1996) in Chemistry at the Catholic University of Leuven, under the supervision of Prof. C. Görller-Walrand. Since 1996, he has been a Postdoctoral Fellow of the Fund for Scientific Research Flanders (Belgium). He did postoctoral work with Prof. J. Lucas (Rennes, F) and Prof. D. W. Bruce (Exeter, UK). In 2000, he received the first ERES Junior Award (ERES: European Rare-Earth and Actinide Society).His current research interests are metal-containing liquid crystals (metallomesogens), MRI contrast reagents, lanthanide-doped sol−gel glasses, and lanthanide spectroscopy. Other interests include reading, collecting minerals, Egyptology, and the history of articifial lighting.

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“…EuGd complexes were synthesized following the method reported in reference[8,9]. The thin film for EL cells was prepared by spin coating on an ITO glass substrate from PVK: EuGd complexes:PBD dichloroethane solution with a concentration of 15 mg/mI.…”

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confidence: 99%

Phosphorescent emission from organic electroluminescent device

Zhang

Sun³

et al. 2000

Fourth International Conference on Thin Film Physics and Applications

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A novel organic electroluminescent device with EuGd complex (Euo1Gdo.9)(TTA)3(TPPO)2 as an emitter is presented. and the characteristics of the device are investigated. The phosphorescence emission from the device are observed, which are discussed in terms of yields of phosphorescence from the triplet excited state of the Gd and Eu 3+.chelates due to the strong protuberance to the spin-orbit levels of the ligands by the paramagnetic Gd ions. Both the photoluminescent and electroluminescent efficiencies at different temperature between 77K and 300K are measured by integrating sphere method. Our results show that the phosphorescent emission from the triplets excited state might be useful to improve the quantum efficiency of organic electroluminescent devices.

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Luminescence enhancement of Eu(III) or Tb(III) complexes with organic ligands by Ln(III) (Ln  Y, La, Gd, Lu)

Cited by 15 publications

References 6 publications

Synthesis and Characterization of Linear Luminescent Schiff-Base Polyelectrolytes with Europium(III) in the Backbone^1a

Synthesis and Characterization of Linear Luminescent Schiff-Base Polyelectrolytes with Europium(III) in the Backbone^1a

Lanthanide-Containing Liquid Crystals and Surfactants

Phosphorescent emission from organic electroluminescent device

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Luminescence enhancement of Eu(III) or Tb(III) complexes with organic ligands by Ln(III) (Ln  Y, La, Gd, Lu)

Cited by 15 publications

References 6 publications

Synthesis and Characterization of Linear Luminescent Schiff-Base Polyelectrolytes with Europium(III) in the Backbone1a

Synthesis and Characterization of Linear Luminescent Schiff-Base Polyelectrolytes with Europium(III) in the Backbone1a

Lanthanide-Containing Liquid Crystals and Surfactants

Phosphorescent emission from organic electroluminescent device

Contact Info

Product

Resources

About

Synthesis and Characterization of Linear Luminescent Schiff-Base Polyelectrolytes with Europium(III) in the Backbone^1a

Synthesis and Characterization of Linear Luminescent Schiff-Base Polyelectrolytes with Europium(III) in the Backbone^1a