Microwave-Assisted Synthesis of Monodisperse Nickel Nanoparticles Using a Complex of Nickel Formate with Long-Chain Amine Ligands
Microwave-Assisted Synthesis of Monodisperse Nickel Nanoparticles Using a Complex of Nickel Formate with Long-Chain Amine Ligands
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DOI：
10.1246/bcsj.82.1044
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发表时间：
2009-08
影响因子：
4
通讯作者：
T. Yamauchi;Y. Tsukahara;T. Sakamoto;Kono Takumi;M. Yasuda;A. Baba;Y. Wada
中科院分区：
文献类型：
--
作者：
T. Yamauchi;Y. Tsukahara;T. Sakamoto;Kono Takumi;M. Yasuda;A. Baba;Y. Wada
在微波辐射下，通过分子内还原长链胺甲酸盐配合物中的Ni 2+离子，在极短的时间内成功制备了面心立方（fcc）Ni纳米粒子.甲酸根离子与Ni 2+配位后，在反应中充当Ni 2+的还原剂，最终分解为氢气和二氧化碳。长链胺的连接通过降低甲酸镍络合物还原所需的能垒而降低了反应温度。采用甲酸镍与不同链长的烷基胺如油胺（=（Z）-9-十八烯胺）、十四胺（=十四胺）和十二胺（=十二胺）的络合物，分别制备了平均粒径为43、71和106 nm的单分散镍纳米粒子。讨论了Ni纳米颗粒的磁性与颗粒尺寸的关系。
We have successfully prepared face-centered cubic (fcc) Ni nanoparticles by the intramolecular reduction of Ni 2+ ion contained in a formate complex having long-chain amine ligands within an extremely short time under microwave irradiation. Formate ion coordinated to Ni 2+ ion acted as a reducing agent for Ni 2+ in this reaction and finally decomposed to hydrogen and carbon dioxide. Ligation of the long-chain amine lowered the reaction temperatures by decreasing the energy barrier required for the reduction of the nickel formate complex. Monodisperse Ni nanoparticles with average sizes of 43, 71, and 106 nm were prepared using the complex of nickel formate with several chain lengths of alkylamines such as oleylamine (=(Z)-9-octadecenylamine), myristylamine (=tetradecylamine), and laurylamine (=dodecylamine), respectively. The relationship between the magnetic properties and the particle sizes of Ni nanoparticles is discussed.