Self-assembled heavy lanthanide orthovanadate architecture with controlled dimensionality and morphology.
Self-assembled heavy lanthanide orthovanadate architecture with controlled dimensionality and morphology.
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DOI：
10.1002/chem.200801724
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发表时间：
2009-01
期刊：
影响因子：
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通讯作者：
L. Qian;Jun Zhu;Zhu Chen;Y. Gui;Q. Gong;Yanping Yuan;J. Zai;Xuefeng Qian
中科院分区：
文献类型：
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作者：
L. Qian;Jun Zhu;Zhu Chen;Y. Gui;Q. Gong;Yanping Yuan;J. Zai;Xuefeng Qian
通过络合剂辅助的溶液路线，已经大规模合成了具有柿子状、立方体状和纳米颗粒形状的几乎单分散的YVO（4）结构。通过控制反应时间、配位剂与Y（3+）的摩尔比以及不同的配位剂，可以有效地调节这些结构的形状和尺寸。作为一种典型的形貌，单分散纳米柿子的生长过程进行了研究。为了扩展这一方法，通过调整不同的稀土前驱体，也可以获得具有明确形状和维度的其他LnVO（4）（Ln=Ce，Gd，Dy，Er）配合物。进一步的研究表明，稀土钒酸盐的形貌主要取决于稀土离子与络合剂之间的相互作用。紫外吸收光谱和光致发光光谱表明，YVO（4）纳米晶体的光学性质与其尺寸和形状有关。这项工作揭示了一些明确的复杂纳米结构的设计，并探讨了合成架构的潜在应用。
Nearly monodisperse YVO(4) architectures with persimmon-like, cube-like and nanoparticle shapes have been synthesised on a large scale by means of a complexing-agent-assisted solution route. The shape and size of these as-prepared architectures can be tuned effectively by controlling the reaction conditions, such as reaction time, the molar ratio of complexing agent/Y(3+) and different complexing agents. As a typical morphology, the growth process of monodisperse nanopersimmons has been examined. To extend this method, other LnVO(4) (Ln=Ce, Gd, Dy, Er) complexes with well-defined shape and dimensionality can also be achieved by adjusting different rare earth precursors. Further studies reveal that the morphology of the as-synthesised lanthanide orthovanadate is determined mainly by the interaction between rare earth ion and the complexing agent. Ultraviolet (UV) absorption and photoluminescence spectra show that the optical properties of YVO(4) nanopersimmons are relevant to their size and shape. This work sheds some light on the design of well-defined complex nanostructures, and explores the potential applications of the as-synthesised architectures.