在高度稳定的含稀土fcu型金属有机框架中,乱和吸附偏好
A R Bonity J Lutton-Gething1, Ben F Spencer2,3, George F S Whitehead1
1Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
Chemistry of materials : a publication of the American Chemical Society
|March 4, 2024
概括
这项研究揭示了稀土金属有机框架 (RE-MOF) 的障碍,特别是Y-fum-fcu-MOF结构中的障碍. 了解分子构建块和链接器中的这种障碍是为特定应用量身定制RE-MOF的关键.
科学领域:
- 材料科学 材料科学 材料科学
- 无机化学 无机化学
- 纳米技术 纳米技术
背景情况:
- 稀土 (RE) 金属有机框架 (MOF) 是具有越来越多应用的功能材料.
- 使用捐赠调节器合成的含的RE-MOFs,代表了一个重要的子集.
- 这些MOF中分子构建块 (MBB) 核心的精确结构,特别是桥梁组 (X),仍然不太清楚.
研究的目的:
- 为了阐明含的RE-MOFs的MBB内的RE-X核心的确切性质.
- 用先进的光谱技术研究原型Y-fum-fcu-MOF (1) 中的结构障碍.
- 了解已识别的障碍对框架属性和潜在应用的影响.
主要方法:
- 合成的Y-fum-fcu-MOF (1). 这是一个很好的方法.
- 高场 (20 T) 固态核磁共振 (NMR) 光谱.
- 宿主与客人的相互作用的晶体分析.
主要成果:
- 确定了框架障碍的两个主要来源:MBB的μ3-X面罩组和烟酸 (fum) 链接器.
- MBB核心含有μ3-F-和 (OH) - 组的混合物,导致不同的内部框架.
- 烟雾链接器表现出无序的桥接或化-bis-bidentate模式,在激活时影响易斯酸度.
结论:
- 该研究澄清了含的RE-MOF的复杂结构,揭示了MBB和链接器组件的障碍.
- 这种结构复杂性,特别是μ3组的分离和链接器障碍,为调整框架属性提供了机会.
- 这些发现为为特定应用量身定制的易斯酸度和吸附特性设计RE-MOF铺平了道路.
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