• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Revisiting the Molecular Roots of a Ubiquitously Successful Synthesis: Nickel(0) Nanoparticles by Reduction of [Ni(acetylacetonate) _2]
【24h】

Revisiting the Molecular Roots of a Ubiquitously Successful Synthesis: Nickel(0) Nanoparticles by Reduction of [Ni(acetylacetonate) _2]

机译：回顾一个普遍成功的合成的分子根源：通过还原[（乙酰丙酮）_2]镍（0）纳米粒子。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The widely used preparation of Ni ~0 nanoparticles from [Ni(acac) _2] (acac=acetylacetonate) and oleylamine, often considered to be a thermolysis or a radical reaction, was analyzed anew by using a combination of DFT modeling and designed mechanistic experiments. Firstly, the reaction was followed up by using TGA to evaluate the energy barrier of the limiting step. Secondly, all the byproducts were identified using NMR spectroscopy, mass spectrometry, FTIR, and X-ray crystallography. These methods allowed us to depict both main and side-reaction pathways. Lastly, DFT modeling was utilized to assess the validity of this new scheme by identifying the limiting steps and evaluating the corresponding energy barriers. The oleylamine was shown to reduce the [Ni(acac) _2] complex not through a one-electron radical mechanism, as often stated, but as an hydride donor through a two-electron chemical reduction route. This finding has strong consequences not only for the design of further nanoparticles syntheses that use long-chain amine as a reactant, but also for advanced understanding of catalytic reactions for which these nanoparticles can be employed.
机译：通过结合使用DFT建模和设计的机理实验，从[Ni（acac）_2]（acac =乙酰丙酮酸）和油胺中广泛认为的Ni〜0纳米颗粒制备方法，这些方法通常被认为是热分解或自由基反应， 。首先，通过TGA跟踪反应以评估限制步骤的能垒。其次，使用NMR光谱，质谱，FTIR和X射线晶体学鉴定所有副产物。这些方法使我们能够描绘主要和副反应途径。最后，通过确定限制步骤并评估相应的能垒，利用DFT建模来评估该新方案的有效性。已显示油胺不是通过常说的单电子自由基机理，而是通过两电子化学还原途径的氢化物供体，还原[Ni（acac）_2]络合物。这一发现不仅对使用长链胺作为反应物的其他纳米颗粒合成物的设计具有重要的影响，而且对于深入理解可以使用这些纳米颗粒的催化反应也具有重要意义。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号