Synthesis and spectroscopic behavior of highly luminescent trinuclear europium complexes with tris-β-diketone ligand

Wang, Dun‐Jia; Pi, Yan; Liu, Hua; Wei, Xianhong; Hu, Yanjun; Zheng, Jing

doi:10.1016/j.jallcom.2014.05.222

Cited by 12 publications

(6 citation statements)

References 23 publications

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“…Many applications have been found in laser materials, chemical sensor, fluorescent probes, photoluminescent materials, magnetic molecular materials and organic light-emitting diodes [5−7]. Recently, the design, synthesis and optical properties of many novel europium (III) complexes with β-diketones have been reported [8][9][10]. In addition, some reports demonstrated that the β-diketones containing high-energy oscillators, such as C−H and O−H bonds, could quench the metal excited states nonradiatively, thereby resulting in lower luminescence intensities and shorter excited-state lifetimes [11,12].…”

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confidence: 99%

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Synthesis and photoluminescent properties of Eu (III) complexes with fluorinated β-diketone and nitrogen heterocyclic ligands

et al. 2016

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confidence: 99%

“…6H, Ar−H, J = 8.3Hz), 7.40 (t, 6H, Ar−H, J = 6.7Hz),8.52 (d, 2H, Bipy−H, J = 6.7Hz),9.77 (t, 2H, Bipy−H, J = 7.4Hz),10.47 (d, 2H, Bipy−H, J = 7.7Hz), 12.78 (br, 2H, Bipy−H) ppm. Anal.…”

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confidence: 99%

Synthesis and photoluminescent properties of Eu (III) complexes with fluorinated β-diketone and nitrogen heterocyclic ligands

et al. 2016

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“…A 0 J are spontaneous emission probabilities assigned to 5 D 0 → 7 F J transitions and can be determined using the following equation:

Α_{0 J} goodbreak= A_{01} ((), \frac{I_{0 J}}{I_{01}}) ((), \frac{ν_{01}}{v_{0 J}})

where

v_{0 J}

are energies of barycenter and

I_{0 J}

are integrated areas under the peaks of emission in spectra for distinctive transitions 5 D 0 → 7 F J ( J = 0,1,2,3). A 01 assigned to magnetic allowed transition 5 D 0 → 7 F 1 having a value 50 s −1 is taken as reference, since it hardly fluctuates with ligand field surrounding Eu 3 + [35].…”

Section: Resultsmentioning

confidence: 99%

“…A 01 assigned to magnetic allowed transition 5 D 0 ! 7 F 1 having a value 50 s À1 is taken as reference, since it hardly fluctuates with ligand field surrounding Eu 3 + [35].…”

Section: Juddàofelt Analysismentioning

confidence: 99%

Designing and Judd–Ofelt evaluation of versatile luminescent Eu (III) complexes sensitized with β‐diketone ligand for multifarious applications

et al. 2023

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The present research work entails the synthesis of one binary and four ternary red lightÀemitting Eu (III)-based complexes with 3-benzylidene-2,4-pentanedione as the main ligand and 1,10-phenanthroline, bathophenanthroline, neocuproine, and 4,4 0 -0 dimethyl-2,2 0 -0 bipyridyl as auxiliary ligands. The metal-organic framework of the series was elucidated using energy dispersive X-ray analysis, elemental analysis, Fourier transform infrared spectroscopy, and proton nuclear magnetic resonance. This Eu (III) series exhibits optimum thermal stability, making them a promising candidate for organic light-emitting diodes. On the basis of emission spectra, their optical parameters such as nonradiative and radiative decay rates, luminescence decay time, intrinsic quantum efficiency, and Judd-Ofelt intensity parameter were determined.The monocentric luminescence and Judd-Ofelt parameters reveal the absence of symmetry around the europium center. CIE chromaticity coordinates, correlated color temperature values, color purity, and asymmetric ratios authenticate the color coordinates of the complexes in red region. Optical band gap values lie within the range of wide band gap semiconductors, indicating their utilization in military radars and biological labeling.

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“…The polymers have a very strong characteristic emission. The rare earth complexes [ 24 , 25 , 26 , 27 , 28 , 29 , 30 ] and the polymers (carbonyl groups) can form unstable coordination, thus changing the fluorescence properties of the Eu(III) complexes [ 31 , 32 , 33 , 34 ]. Usually, the emitting colors from the electron transitions in the polymer molecules are blue, while the Eu(III) complexes emit red light.…”

Section: Introductionmentioning

confidence: 99%

The Coordination and Luminescence of the Eu(III) Complexes with the Polymers (PMMA, PVP)

Zhao

Shao

et al. 2018

Polymers

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The rare earth complexes and the polymers can be made into composite nanofibers through electrospinning. The fluorescence intensity of these fiber composites is much higher than that of the rare earth complexes. By changing the mixed proportion of polymethyl methacrylate (PMMA) and complexes, nanofiber materials were prepared. Then, by measuring their fluorescence intensity, it is found that the carbonyl bond of PMMA may have coordinated with the rare earth ions and enhanced the luminescence intensity of them. Then, a series of experiments were designed to study their coordination and luminescence mechanism. The coordination mechanism of the polymers with carbonyl groups and the rare earth complexes was explained by Eu(TFT)3(TPPO), Eu(TFT)3(TPPO)2, Eu(PFP)3(TPPO), Eu(PFP)3(TPPO)2, and polyvinyl pyrrolidone (PVP) dissolved in chloroform solution, where TFT means 2-(2,2,2-trifluoroethyl)-1-tetralone, PFP means 2-(2,2,3,3,3-Pentafluoropro-panoyl)-3,4-dihydronaphthalen-1(2H)-one and TPPO means phosphine oxide. The coordination of PVP and the rare earth complexes in solution was studied, and it was found that the fluorine atoms of the ligand had a significant impact on the aggregation-induced effect of the composites. The electron transitioned in the polymers and the complexes were enhanced greatly by the coordination. The colors of emission light could be adjusted by the coordination of the polymers and the rare earth complexes.

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Synthesis and spectroscopic behavior of highly luminescent trinuclear europium complexes with tris-β-diketone ligand

Cited by 12 publications

References 23 publications

Synthesis and photoluminescent properties of Eu (III) complexes with fluorinated β-diketone and nitrogen heterocyclic ligands

Synthesis and photoluminescent properties of Eu (III) complexes with fluorinated β-diketone and nitrogen heterocyclic ligands

Designing and Judd–Ofelt evaluation of versatile luminescent Eu (III) complexes sensitized with β‐diketone ligand for multifarious applications

The Coordination and Luminescence of the Eu(III) Complexes with the Polymers (PMMA, PVP)

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