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氧化状态分布提供了指导金属有机纳米组装的参数
Asanka S Rathnayake1, Hector W L Fraser2, Euan K Brechin2
1Department of Chemistry , University of Missouri , 601 S. College Avenue , Columbia , Missouri 65211 , United States.
Journal of the American Chemical Society
|September 15, 2018
概括
两种新的基于的金属有机纳米体 (MONC) 由于合成过程中微妙的pH值变化而表现出不同的氧化状态,为新的纳米体设计和宿主-客户化学打开了大门.
科学领域:
- 协调化学
- 超分子化学
- 材料科学
背景情况:
- 金属有机纳米囊 (MONC) 是先进的超分子结构,在催化和宿主-客体化学中具有潜在的应用.
- 控制MONC中的金属中心的氧化状态对于调整它们的特性和反应性至关重要.
- 基于铁烯的配体为构建复杂的金属有机框架提供了多功能平台.
研究的目的:
- 合成和表征两种结构相似的接基C-基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基基
- 研究合成条件,特别是pH,对MONC中中心的氧化状态分布的影响.
- 通过受控合成探索开发具有定制性质的新型MONC的潜力.
主要方法:
- 在相似的反应条件下合成两个不同的基于PgCn的MONC.
- 使用晶体学,电化学和磁感应技术进行表征.
- 在合成的MONC中分析氧化状态的分布.
主要成果:
- 两种MONC均成功合成,每种含有24个中心.
- 一个MONC仅含有Mn{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\displaystyle M_{\}}
- 氧化状态的观察差异归因于合成过程中pH的微小变化.
结论:
- 在合成过程中,pH的微小差异可以显著影响基于Mn的MONC的氧化状态分布.
- 这种依赖pH的控制为设计具有特定功能的新型MONC提供了有希望的策略.
- 这些发现为开发新的MONC和探索它们的宿主-客体化学物质铺平了道路.
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