Liu Yangyang, Klet Rachel C, Hupp Joseph T, Farha Omar
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
Chem Commun (Camb). 2016 Jun 14;52(50):7806-9. doi: 10.1039/c6cc03727e.
Seven Zr/Hf-based MOFs with different degrees of defects were obtained by modulating the synthetic conditions. The number of missing linkers in these MOFs was calculated based on potentiometric acid-base titration. The number of defects was found to correlate quantitatively with the catalytic activity of UiO-type MOFs for an acid-catalyzed epoxide ring-opening reaction. More importantly, we were able to identify a MOF with inherent defective Zr6 nodes, which showed great activity and regio-selectivity for the epoxide ring-opening reaction.
通过调节合成条件获得了七种具有不同缺陷程度的基于Zr/Hf的金属有机框架材料（MOFs）。基于电位酸碱滴定法计算了这些MOFs中缺失连接体的数量。发现缺陷数量与UiO型MOFs在酸催化环氧化合物开环反应中的催化活性存在定量相关性。更重要的是，我们能够鉴定出一种具有固有缺陷Zr6节点的MOF，其在环氧化合物开环反应中表现出很高的活性和区域选择性。
