氟化β-酮羧酸铕(III)配合物的光物理、光学和激光分析。

IF 2.4 3区 化学 Q3 CHEMISTRY, ANALYTICAL
Savita Khatri, Pratibha Ahlawat, S P Khatkar, V B Taxak, Rajesh Kumar
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引用次数: 3

摘要

以a - β-酮羧酸为主配体,n -给体芳香体系为辅助配体,采用生态高效的研磨法制备了6个发光的亮红色Eu(III)配合物。在所有配合物的发射光谱中都表现出Eu(III)离子的独特红色峰(5D0→7F2)。通过衰减时间、色坐标、发光效率和Judd Ofelt参数分析配合物的发光特性。Ω2is值高于Ω4which,表明5d0→7f2转换具有超敏性。结果表明,该配合物是红光发光显示器件的有力竞争者。荧光分支比、受激发射截面、增益带宽和光学增益均表明配合物的5d0→7f2跃迁具有良好的激光强度。该配合物具有良好的热稳定性和半导体范围内的光能带隙值,在光电器件中具有一定的应用价值。研究了配合物的能量转移机理,证实了能量从配体向Eu(III)离子的有效转移。合成的配合物还进行了抗菌和抗氧化性能的测定。据报道,所有配合物都表现出比主配体更好的抗氧化行为,并表现出良好的抗菌活性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Photophysical, optical and lasing analysis of fluorinatedβ-keto carboxylate europium(III) complexes.

Six luminescent, bright red Eu(III) complexes with aβ-keto-carboxylic acid as prime ligand and N-donor aromatic systems as auxillary ligand were synthesised via ecologically efficient grinding method. The distinctive red peak (5D0 → 7F2) of Eu(III) ion is exhibited in emission spectra of all complexes. The luminescent properties of complexes were analysed through decay time, color coordinates, luminescence efficiency and Judd Ofelt parameters. The value of Ω2is found to be higher than Ω4which indicated hypersensitive nature of5D0 → 7F2transition. The results established the complexes as a strong contender for red light emitting display devices. The fluorescence branching ratios, stimulated emission cross section, gain band width and optical gain showed the good lasing strength of5D0 → 7F2transition of complexes. The complexes exhibited decent thermal stability and have optical energy band gap value in semiconductor range, thus can have relevance in optoelectronic devices. Energy transfer mechanism was investigated for complexes which affirmed the efficacious transfer of energy from ligands to Eu(III) ion. The synthesised complexes were also assayed for antimicrobial and antioxidant properties. All complexes are reported to show better antioxidant behaviour than the prime ligand and also exhibited upstanding antibacterial activities.

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来源期刊
Methods and Applications in Fluorescence
Methods and Applications in Fluorescence CHEMISTRY, ANALYTICALCHEMISTRY, PHYSICAL&n-CHEMISTRY, PHYSICAL
CiteScore
6.20
自引率
3.10%
发文量
60
期刊介绍: Methods and Applications in Fluorescence focuses on new developments in fluorescence spectroscopy, imaging, microscopy, fluorescent probes, labels and (nano)materials. It will feature both methods and advanced (bio)applications and accepts original research articles, reviews and technical notes.
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