Manipulation of Discrete Nanostructures by Selective Modulation of Noncovalent Forces
Manipulation of Discrete Nanostructures by Selective Modulation of Noncovalent Forces
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DOI：
10.1126/science.1252120
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发表时间：
2014-05-02
期刊：
影响因子：
56.9
通讯作者：
Aida, Takuzo
中科院分区：
文献类型：
--
作者：
Fukino, Takahiro;Joo, Hyunho;Aida, Takuzo
共价有机合成通常使用选择性键断裂和形成的策略。如果类似的方法可以逐步应用于非共价合成，更奇特或具有挑战性的纳米结构可能成为可能。在这里，我们报告，二茂铁为基础的tetratopic吡啶配体，它可以动态地改变其几何形状，通过热旋转的解决方案中，组装与AgBF 4成离散的金属有机纳米管与大而均匀的直径。纳米管可以通过二茂铁氧化选择性衰减纳米环间的相互作用而被切割成金属有机纳米环。所得的纳米环可以静电转移到无机基底上，或者通过还原中和它们的氧化二茂铁单元来重新组装以形成原始纳米管。
Covalent organic synthesis commonly uses the strategy of selective bond cleavage and formation. If a similar approach can be applied stepwisely to noncovalent synthesis, more exotic or challenging nanostructures might become achievable. Here, we report that ferrocene-based tetratopic pyridyl ligands, which can dynamically change their geometry by means of thermal rotation of their cyclopentadienyl rings in solution, assemble with AgBF4 into discrete metal-organic nanotubes with large and uniform diameters. The nanotubes can be cut into metal-organic nanorings through selective attenuation of the inter-nanoring interaction via ferrocene oxidation. The resultant nanorings can be transferred onto inorganic substrates electrostatically or allowed to reassemble to form the original nanotube by the reductive neutralization of their oxidized ferrocene units.