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Cyano-Bridged Trimetallic Coordination Polymer Nanoparticles and Their Thermal Decomposition into Nanoporous Spinel Ferromagnetic Oxides

机译:氰基桥联三金属配位聚合物纳米颗粒及其热分解成尖晶石铁氧体纳米氧化物

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摘要

The synthesis of a novel family of cyano-bridged trimetallic coordination polymers (CPs) with various compositions and shapes has been reported by changing the compositional ratios of Fe, Co, and Ni species in the reaction system. In order to efficiently control the nucleation rate and the crystal growth, trisodium citrate dihydrate plays an important role as a chelating agent. After the obtained cyanobridged trimetallic CPs undergo thermal treatment in air at three different temperatures (250, 350, and 450 degrees C), nanoporous spinel metal oxides are successfully obtained. Interestingly, the obtained nanoporous metal oxides are composed of small crstalline grains, and the grains are oriented in the same direction, realizing pseudo-single crystals with nanopores. The resultant nanoporous spinel oxides feature interesting magnetic properties. Cyano-bridged multimetallic CPs with various sizes and shapes can provide a pathway toward functional nanoporous metal oxides that are not attainable from simple cyano-bridged CPs containing single metal ions.
机译:通过改变反应体系中Fe,Co和Ni种类的组成比,已经报道了具有各种组成和形状的新型氰基桥联三金属配位聚合物(CPs)的合成。为了有效地控制成核速率和晶体生长,柠檬酸三钠二水合物起螯合剂的作用。在三种不同温度(250、350和450摄氏度)下,在空气中对获得的氰基桥联三金属CP进行热处理后,成功获得了纳米孔尖晶石金属氧化物。有趣的是,所得的纳米多孔金属氧化物是由小的硬壳状晶粒组成的,并且晶粒的取向相同,从而实现了具有纳米孔的假单晶。所得的纳米多孔尖晶石氧化物具有令人感兴趣的磁性。具有各种尺寸和形状的氰基桥联多金属CP可以提供一种通向功能性纳米多孔金属氧化物的途径,而这种功能不能从包含单金属离子的简单氰基桥联CP来获得。

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