Synthesis and luminescent properties of complexes of Eu(III) with 2-thienyltrifluoroacetonate, terephthalic acid and phenanthroline

Zhao, Xuehui; Huang, Kelong; Jiao, Feipeng; Liu, S.Q.; Liu, Z.G.; Hu, Shao‐Jun

doi:10.1016/j.jpcs.2007.04.009

Cited by 15 publications

(7 citation statements)

References 19 publications

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“…It was found that the decay curve for the Eu 3 (TMDPDB)(TTA) 6 (phen) 3 could be fitted with a single exponential, indicating only one chemical microenvironment around where the Eu 3+ ion existed [19], and it was in agreement with the result of only one 5 D 0 → 7 F 0 line in the emission spectrum. The lifetime of this complex was 1.12 ms, which was much longer than the previously reported value (0.687 ms) of mononuclear Eu-complex Eu(TTA) 3-phen [21]. It was attributed to the effect of two additional Eu 3+ lumophors in the trinuclear complex, which enhanced its luminescence efficiency [12].…”

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confidence: 52%

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Highly quantum efficiency trinuclear Eu3+ complex based on tris-diketonate ligand

Yang

Luo

et al. 2011

Inorganic Chemistry Communications

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mentioning

confidence: 52%

“…Due to the contribution of two additional Eu 3+ lumophors, the quantum efficiency of trinuclear Eu-complex (η = 62.3%) was higher than that of the mononuclear Eu-complex (η = 48%) [21]. It expressed that the introduction of ligands with multiple binding sites in Eu-complex could effectively increase the quantum efficiency.…”

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confidence: 97%

Highly quantum efficiency trinuclear Eu3+ complex based on tris-diketonate ligand

Yang

Luo

et al. 2011

Inorganic Chemistry Communications

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“…При расчёте большинства параметров по спектрам излучения соединений Eu 3+ в в последние два десятилетия использовалась регистрация излучаемой мощности, в то время как большинство современного оборудования позволяет определять количество излучаемых фотонов в секунду [35][36][37][38][39][40][41][42]. Кроме того, все оценки параметров интенсивности, интегральных интенсивностей и центроидов получали при использовании спектров излучения, записанных в длинах волн.…”

Section: Introductionunclassified

Об экспериментальном определении параметров интенсивности 4f-4f-переходов по спектрам излучения соединений европия (III)

Blois

Neto

Longo

et al. 2022

Оптика И Спектроскопия

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Eu3+ complexes and specially β-diketonate compounds are well known and studied in several areas due to their luminescence properties, such as sensors and lightning devices. A unique feature of the Eu3+ ion is the experimental determination of the 4f-4f intensity parameters Ωλ directly from the emission spectrum. The equations for determining Ωλ from the emission spectra are different for the detection of emitted power compared to modern equipment that detects photons per second. It is shown that the differences between Ωλ determined by misusing the equations are sizable for Ω4 (ca. 15.5%) for several Eu3+β-diketonate complexes and leads to differences of ca. 5% in the intrinsic quantum yields Q_Ln^Ln. Due to the unique features of trivalent lanthanide ions, such as the shielding of 4f-electrons, which lead to small covalency and crystal field effects, a linear correlation was observed between Ωλ obtained using the emitted power and photon counting equations. We stress that care should be exercised with the type of detection should be taken and provide the correction factors for the intensity parameters. In addition, we suggest that the integrated intensity (proportional to the areas of the emission band) and the centroid (or barycenter) of the transition for obtaining Ωλ should be determined in the properly Jacobian-transformed spectrum in wavenumbers (or energy). Due to the small widths of the emission bands of typical 4f-4f transitions, the areas and centroids of the bands do not depend on the transformation within the experimental uncertainties. These assessments are relevant because they validate previously determined Ωλ without the proper spectral transformation.

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“…Consequently, many europium complexes with the high absorption coefficient ligands, especially b-diketone ligands, have been designed and synthesized [6][7][8]. Recently, we also reported some new europium complexes with b-diketone ligands and investigated their photoluminescence properties [9,10].…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Liu

et al. 2014

Journal of Alloys and Compounds

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Synthesis and luminescent properties of complexes of Eu(III) with 2-thienyltrifluoroacetonate, terephthalic acid and phenanthroline

Cited by 15 publications

References 19 publications

Highly quantum efficiency trinuclear Eu3+ complex based on tris-diketonate ligand

Highly quantum efficiency trinuclear Eu3+ complex based on tris-diketonate ligand

Об экспериментальном определении параметров интенсивности 4f-4f-переходов по спектрам излучения соединений европия (III)

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

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