Luminescence properties of polymers containing europium complexes with 4-tert-butylbenzoic acid

Three novel Eu-complexes based on phenanthroline derivatives as second ligands have been synthesized and characterized by element analysis, 1H NMR, FT-IR, UV-vis, and PL. The luminescence spectra presented characteristic emission lines of Eu3+ ion. The results of luminescence spectra indicated that the Eu3+ ion occupied only a single site, and the ligand filed surrounding the Eu3+ ion was highly polarizable. Meanwhile, all complexes exhibited relative high luminescence quantum efficiency (η). Among these Eu-complexes, the complex Eu (DBM)3HPIP exhibited the lowest quantum efficiency due to the presence of O-H oscillators in this complex, the result indicated different phenanthroline derivatives as second ligands can significantly influence the luminescence properties of Eu-complexes.

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Synthesis, Spectral and Luminescence Properties of Complexes Europium with N-benzenesulphonyl-L-phenylalanine and 1,10-Phenanthroline

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.322.318 ◽

2011 ◽

Vol 322 ◽

pp. 318-321

Author(s):

Xi Shi Tai

Keyword(s):

Ir Spectroscopy ◽

Luminescence Intensity ◽

Molar Conductivity ◽

Luminescence Properties ◽

Luminescence Spectra ◽

Dmso Solution ◽

Europium Complexes ◽

Luminescence Emission ◽

Phenanthroline Complex

The complexes of europium with N-benzenesulphonyl-L-phenylalanine (complex 1), N-benzenesulphonyl-L-phenylalanine and phenanthroline (complex 2) were synthesized and characterized by IR spectroscopy, UV and molar conductivity. The luminescence spectra of two europium complexes were investigated in solid and in DMSO solution, respectively. The results show that complex 1 exhibits low luminescence emission and complex 2 exhibits high luminescence emission in red region. And phenanthroline could enhance the luminescence intensity of europium complexes.

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Improved Luminescence Properties of Europium Complexes Encapsulated into Mesoporous SBA-15

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2008.18182 ◽

2008 ◽

Vol 8 (3) ◽

pp. 1272-1278 ◽

Cited By ~ 2

Author(s):

Suwen Li ◽

Hongwei Song ◽

Wenlian Li ◽

Shaozhe Lu ◽

Xinguang Ren

Keyword(s):

Crystal Field ◽

Relative Intensity ◽

Electron Transition ◽

Luminescent Properties ◽

Emission Lines ◽

Luminescence Properties ◽

Europium Complexes ◽

Pure Complex

Two kinds of Eu3+ complexes—Eu(TTA)3(TPPO)2 (TTA: thenoyltrifluoroacetone, TPPO: triphenylphosphineoxide) and Eu(BA)3(TPPO)2 (BA: 1-benzoylacetone)—were fully encapsulated, uniformly distributed into the channels of unmodified and modified SBA-15, and structurally characterized. The luminescent 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 encapsulated in SBA-15 were split into different components, and the 5D0-7F0 transitions became partly allowed. The emission lines for the 5D0-7F2 transitions 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.

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