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Eu(Tb)配合物及配合物/SiO_2复合发光材料的制备及荧光性能研究
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摘要
由于稀土元素特殊的电子构型及多种多样的电子能级,因此含稀土的配合物表现出许多独特的化学性质和物理性质。稀土配合物具有发射光谱呈线性,激发和发射波长理想,荧光寿命长,特征发射波长不受基质影响等特点,使其在发光领域广泛应用。稀土有机荧光配合物具有优良的发光性能,但其致命的弱点,光和热的不稳定性限制了它们的应用空间。实践表明,将稀土配合物引入到无机基质中,能提高其光和热的稳定性,所以研究稀土配合物/SiO_2杂化发光材料对稀土配合物的应用有着十分重要的意义。
     本论文采用水热法,液相法成功制备出不同形貌的稀土配合物纳米粒子。通过溶胶-凝胶法把稀土配合物掺入SiO_2基质中,制备稀土配合物/SiO_2复合发光球及纳米管,来提高稀土配合物对光和热的稳定性。采用TEM、SEM、XRD、FTIR和PL等测试手段对产物进行了表征,获得了一些有意义的新结果,对进一步研究稀土配合物及其复合物的性质奠定了基础。该复合材料在生物示踪、光子晶体、发光与显示、微腔激光、数据存储、纳米传感器等多种领域具有潜在的应用价值。
The rare earth complexes present many unique chemical and physical properties because the rare earth elements have special electronic configuration and a variety of electronic energy levels. Rare earth complexes have the characteristic of linear emission spectra, ideal excitation and emission wavelength, longer fluorescent lifetime, and the characteristic emission wavelength is not be affected by the host, so they are widely used in luminescence fields. Rare-earth organic fluorescent complexes have an excellent luminescence properties, but its fatal weakness is light and heat instability, which limits their use space. It is practiced that the introducing the rare earth complexes into inorganic matrix can enhance its stability, so study of rare earth complexe / SiO_2 hybrid luminescence materials is very important for the application of rare earth complexes.
     In this thesis, rare earth complex nanoparticles with different morphologies were prepared by hydrothermal and liquid phase method, the complex/SiO_2 nanospheres and nanotubes were synthesized by sol-gel method, in order to enhance the stability of heat and light. TEM, SEM, XRD, FTIR and PL measurements were used to characterize the samples, and some new results have been obtained, which will laid the foundation for further studies on the properties of rare earth complexes. The composite materials have potential application value in the biological track, photonic crystals, luminescence and display, micro-cavity lasers, data storage, nano-sensors and other fields.
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