新型稀土发光材料的制备及其发光性质研究

发布时间：2018-05-16 17:16

本文选题：稀土 + 层状稀土氢氧化物　；参考：《河北工业大学》2015年硕士论文

【摘要】：稀土金属因本身特殊的电子结构,使其具有优异的电、光、催化等性能,在发光领域和光学材料中有着广泛的应用。层状稀土氢氧化物(Layered Rare-earth Hydroxides,LRHs)是一类具有层状结构的新型无机层状功能材料。该类物质结合了无机稀土离子和层状材料的双重优点,是一种新型的、有发展潜力的功能发光材料。离子液体(Ionic Liquids)被人们称为“可设计”的绿色溶剂,通过嫁接将各种功能化基团连接到阴阳离子上制备出功能化离子液体,可以应用到诸多领域。稀土有机配合物与苯甲酸功能化聚离子液体配位得到发光性能更好的新型发光材料。(1)制备了层状稀土氢氧化物(Eu_2(OH)5Cl·1.5H_2O,记为LEuH),并用α-噻吩乙酰三氟丙酮(TTA)进行修饰,得到了新型层状发光材料LEuH-TTA,通过热分析、X-射线衍射、红外光谱等进行了表征。LEuH-TTA以一种简单的方式,制备了透明度高、发光强的新型发光薄膜,并通过荧光光谱、红外光谱、扫描电镜对其性能进行了表征。(2)制备高纯度的聚乙烯基离子液体(PVim),并合成苯甲酸功能化聚离子液体(PVim[Br]-BA),通过核磁和飞行时间质谱进行表征。以六氟乙酰丙酮(HFA)作为有机配体,分别与稀土离子Eu3+和Tb3+合成稀土有机配合物Eu(HFA)3和Tb(HFA)3,通过热重分析和荧光光谱进行表征。聚离子液体与稀土、稀土配合物配位制备出新型的发光材料,并通过荧光光谱、红外光谱、热重分析对其性能进行了表征。实验数据表明,聚离子液体与稀土配位后能有效地敏化稀土离子的发光;聚离子液体与稀土配合物配位后能更好的敏化稀土离子发光,提高其荧光寿命。
[Abstract]:Rare earth metals have been widely used in luminescence and optical materials because of their special electronic structure and excellent electrical, optical and catalytic properties. Layered rare earth hydroxide (Layered Rare-earth Hydroxides LRHs) is a novel inorganic layered functional material with layered structure. This kind of material combines the double advantages of inorganic rare earth ions and layered materials. It is a new type of functional luminescent material with potential development. Ionic liquid (Ionic liquid) is known as a "design" green solvent. It can be applied to many fields by grafting various functional groups to the anionic and anion ions to prepare functionalized ionic liquids. A novel luminescent material with better luminescence properties was obtained by the coordination of rare earth organic complexes with benzoic acid functionalized polyionic liquids. A layered rare earth hydroxide, Eu2OHN 5Cl 1.5H _ 2O, was prepared, described as LEUHN, and modified with 伪 -thiophene acetyltrifluoroacetone (TTAA). A novel lamellar luminescent material, LEUH-TTA, was obtained. Characterized by thermal analysis, X-ray diffraction and infrared spectroscopy, a novel luminescent thin film with high transparency and strong luminescence was prepared by means of a simple method. Its properties were characterized by scanning electron microscope (SEM). PVimn was prepared by high purity polyethylene based ionic liquid (PVimn), and the benzoic acid functionalized polyionic liquid (PVim [Br] -BAN) was synthesized and characterized by NMR and time-of-flight mass spectrometry (TF-MS). Rare earth organic complexes Eu(HFA)3 and TbHFA3 were synthesized with rare earth ions Eu3 and Tb3 using hexafluoroacetylacetone acetone as organic ligand and characterized by thermogravimetric analysis and fluorescence spectra. A novel luminescent material was prepared by the coordination of polyionic liquid with rare earth and rare earth. Its properties were characterized by fluorescence spectrum, infrared spectrum and thermogravimetric analysis. The experimental data show that the luminescence of rare earth ions can be sensitized effectively by the coordination of polyionic liquids with rare earth, and the luminescence of rare earth ions can be better sensitized by the coordination of polyionic liquids with rare earth complexes.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ422

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