Enhancement of luminescence performance of rare-earth complexes by tuning the synergistic effect of Sm (III) and Eu (III)

IF 3.5 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jin Hao, Zhihui Yi, Yuntao Li
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引用次数: 0

Abstract

The study of rare-earth ion organic complex materials is an overlapping field of inorganic and organic luminescence research. It has important theoretical significance and has been widely used in temperature sensing and biomedical applications, among others. In this work, a series of samarium and europium binuclear rare-earth organic complexes Eu1-xSmx(BA)3phen (x = 0.2,0.5,0.8) were synthesized by using benzoic acid (BA) and phenanthroline (Phen) as the first and second ligands. The possible molecular structure of the newly synthesized complex was also speculated. The results of UV/Vis spectra show that the series of rare-earth organic complexes can effectively absorb ultraviolet light and visible light, and the absorption peaks mainly come from the organic ligands BA and Phen. The results of fluorescence spectroscopy (FS) show that the incorporation of Sm3+ has a fluorescence enhancement effect on Eu3+. When the molar fraction of Sm3+ is 50%, the Eu0.5Sm0.5(BA)3phen complex exhibits a sheet shape and the luminescence intensity reaches the maximum. Thermogravimetric analysis showed that the rare-earth complexes had good thermal stability. In addition, it can emit bright fluorescence under ultraviolet light irradiation. This work uses the antenna effect to elucidate the energy transfer mechanism in the dinuclear rare-earth complexes and the synergistic enhancement of the fluorescence properties of the two rare-earth ions, which provides some theoretical basis for the study of rare-earth complexes.

Graphical abstract

通过调节Sm (III)和Eu (III)的协同效应增强稀土配合物的发光性能
稀土离子有机配合材料的研究是无机与有机发光研究的交叉领域。它具有重要的理论意义,广泛应用于温度传感和生物医学等领域。本文以苯甲酸(BA)和菲罗啉(Phen)为第一和第二配体,合成了一系列钐铕双核稀土有机配合物Eu1-xSmx(BA)3phen (x = 0.2,0.5,0.8)。对新合成的配合物可能的分子结构进行了推测。紫外/可见光谱结果表明,稀土有机配合物系列能有效吸收紫外光和可见光,吸收峰主要来自有机配体BA和Phen。荧光光谱(FS)结果表明,Sm3+的掺入对Eu3+有荧光增强作用。当Sm3+的摩尔分数为50%时,Eu0.5Sm0.5(BA)3phen配合物呈片状,发光强度达到最大。热重分析表明稀土配合物具有良好的热稳定性。此外,在紫外光照射下还能发出明亮的荧光。本工作利用天线效应阐明了双核稀土配合物中的能量传递机理以及两种稀土离子荧光性质的协同增强,为稀土配合物的研究提供了一定的理论依据。图形抽象
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来源期刊
Journal of Materials Science
Journal of Materials Science 工程技术-材料科学:综合
CiteScore
7.90
自引率
4.40%
发文量
1297
审稿时长
2.4 months
期刊介绍: The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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