灵活的吸附和转化行为在微孔金属有机框架中
Edmund J Cussen1, John B Claridge, Matthew J Rosseinsky
1Contribution from the Department of Chemistry, University of Liverpool, UK L69 7ZD.
Journal of the American Chemical Society
|August 9, 2002
概括
本研究详细介绍了一种金属有机框架 (MOF) 材料的合成和表征,Ni(2)(4,4'-二氧化)(3)(NO(3))(4),该材料具有结构稳定性和多孔性. MOF经历了客人诱导的转变,提供了对动态多孔材料的见解.
科学领域:
- 材料科学 材料科学 材料科学
- 晶体学 晶体学是指结晶学.
- 化学 化学 化学
背景情况:
- 金属有机框架 (MOF) 是具有多种应用的晶体多孔材料.
- 了解MOF的结构稳定性和客户互动对于其实际使用至关重要.
- 特定的MOF材料Ni(2)(4,4' - - 双氨酸)(3)(NO(3))(4) (A) 进行了对其特性的研究.
研究的目的:
- 合成和表征金属有机框架Ni(2)(4,4' - - 双二烯) ((3)(NO(3)) ((4) (A).
- 研究MOF在溶解后的结构稳定性及其热性质.
- 探索MOF的吸附能力,特别是它与二烯的相互作用.
- 研究一个相关的MOF (B) 到MOF (A) 的客驱动固态转换.
主要方法:
- 单晶X射线衍射用于结构确定.
- 粉末X射线衍射用于散装纯度和温度稳定性分析.
- 吸附实验,以评估客分子吸收.
- 蒙特卡洛对接计算来预测客人的住宿.
主要成果:
- 的梯子结构 (A) 在溶解后保持完整,并稳定到215°C.
- 尽管有小孔窗 (12.3 Å2),但MOF允许 (26.6 Å2截面面积) 没有结构变化.
- 蒙特卡洛模拟证实了MOF孔内的多烯容纳.
- 暴露于二四二二二二二二二二二二二二二二二三四三四二二二二二五 (B) 的甲醇蒸汽会诱导一个快速的,客驱动的转化到晶体MOF (A).
结论:
- 合成的MOF (A) 是一种热稳定,多孔材料,能够容纳更大的客分子.
- 展示了相关的MOF结构 (B到A) 之间的客户驱动的固态转换,突出了这些材料的动态性质.
- 拟议的转换机制涉及破坏框架的共价键.
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