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首页> 外文期刊>Nano letters >Molecule-Based Magnetic Nanoparticles: Synthesis of Cobalt Hexacyanoferrate, Cobalt Pentacyanonitrosylferrate, and Chromium Hexacyanochromate Coordination Polymers in Water-in-Oil Microemulsions
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Molecule-Based Magnetic Nanoparticles: Synthesis of Cobalt Hexacyanoferrate, Cobalt Pentacyanonitrosylferrate, and Chromium Hexacyanochromate Coordination Polymers in Water-in-Oil Microemulsions

机译：基于分子的磁性纳米粒子：油包水型微乳状液中六氰合高铁酸钴，五氰基亚硝酸钴和六价铬酸铬配位聚合物的合成

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摘要

Although considerable effort has been dedicated to the controlled synthesis of nanoparticles with classical inorganic structures, there are few reports on the formation of nanoscale materials based on supramolecular compounds such as transition metal coordination polymers. Here we describe the synthesis of crystalline nanoparticles of three different molecule-based magnetic materials, cobalt hexacyanoferrate, cobalt pentacyanonitrosylferrate, and chromium hexacyanochromate, by coprecipitation reactions involving mixtures of water-in-oil microemulsions. The cobalt-containing nanoparticles are regular in shape and size and have dimensions between 12 and 22 nm depending on the concentration of the reactants trapped within the water droplets. At sufficiently high particle concentrations, superlattice structures are formed by solvent evaporation. Growth of the nanoparticles occurs by interdroplet aggregation of primary clusters that are nucleated in the confined spaces of the microemulsion reaction field.
机译：尽管已经投入了大量的精力来控制具有经典无机结构的纳米粒子的合成，但是很少有关于基于超分子化合物（例如过渡金属配位聚合物）的纳米级材料形成的报道。在这里，我们通过涉及油包水微乳液混合物的共沉淀反应，描述了三种不同的基于分子的磁性材料（六氰合铁酸钴，五氰基亚硝酸钴高铁酸钴和六氰基铬酸铬）的结晶纳米粒子的合成。含钴的纳米颗粒的形状和大小是规则的，并且尺寸取决于捕获在水滴中的反应物的浓度在12至22 nm之间。在足够高的颗粒浓度下，通过溶剂蒸发形成超晶格结构。纳米颗粒的生长通过微簇反应场的狭窄空间中成核的初级簇的液滴间聚集而发生。

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