解读金属的空间布局和多变体金属有机框架中的反应性
Qi Liu1, Hengjiang Cong1, Hexiang Deng1
1Key Laboratory of Biomedical Polymers-Ministry of Education, College of Chemistry and Molecular Sciences and §The Institute for Advanced Studies, Wuhan University , Wuhan 430072, China.
Journal of the American Chemical Society
|October 6, 2016
概括
研究人员合成了具有多种金属组合的多变金属有机框架 (MTV-MOF). 在MTV-MOF中混合良好的金属显著提高光氧化反应的性能.
科学领域:
- 材料科学
- 纳米技术
- 催化剂
背景情况:
- 金属有机框架 (MOF) 是具有调节性质的多功能多孔材料.
- 多变量MOF (MTV-MOF) 允许在单个框架内结合多个不同的金属位点.
- 控制MTV-MOF中的金属的空间排列对于优化其功能至关重要.
研究的目的:
- 合成和描述一系列具有不同金属组成的基于的MTV-MOF.
- 调查这些MTV-MOF的二级建筑单元 (SBU) 中的金属的空间布局.
- 在光氧化反应中评估具有不同金属分布的MTV-MOF的催化性能.
主要方法:
- 在三角形SBU中合成36种基于的MOF与多种金属组合.
- 使用X射线光电子光谱 (XPS) 和紫外线散反射光谱进行表征.
- 在SBU中分析金属的空间布局 (域与混合).
主要成果:
- 成功合成并描述了含有Mg,Mn,Co,Ni和Fe的MTV-MOF,包括混合金属SBU.
- 确定SBU中的金属存在于不同的领域或混合良好.
- 与域结构对应物相比,MTV-MOF在其SBU中混合金属在1,5-二氨的光氧化中表现出优异的性能.
结论:
- 在MTV-MOF SBU中金属的空间布局对催化活动有重大影响.
- 混合良好的金属分布导致协同效应,提高了超出单个组件的总和的催化性能.
- 这项研究为设计用于催化应用的高效MTV-MOF提供了见解.
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