Zou Yu-Huang, Wu Qiu-Jin, Yin Qi, Huang Yuan-Biao, Cao Rong
Department of Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230000, P. R. China.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
Inorg Chem. 2021 Feb 15;60(4):2112-2116. doi: 10.1021/acs.inorgchem.0c01199. Epub 2020 Jul 2.
Three cationic capsule-shaped Zr-based metal-organic polyhedra (MOPs) with different cavity sizes were successfully constructed through the self-assembly of trinuclear zirconocene clusters and imidazolium-functionalized dicarboxylic ligands. Owing to the imidazolium groups in the MOPs, they show good CO adsorption uptake. Moreover, the halogen anions of the imidazolium groups and Brønsted acid sites (-OH) in the Zr-based knots are in close proximity, making these MOPs able to catalyze synergistically the cycloaddition reaction of CO with epoxides into cyclic carbonates. This is the first report of using MOPs as catalysts for this reaction without the addition of a cocatalyst.
通过三核锆茂簇与咪唑功能化二羧酸配体的自组装，成功构建了三种具有不同空腔尺寸的阳离子胶囊状锆基金属有机多面体（MOPs）。由于MOPs中的咪唑基团，它们表现出良好的CO吸附量。此外，咪唑基团的卤素阴离子与锆基节点中的布朗斯特酸位点（-OH）紧密相邻，使得这些MOPs能够协同催化CO与环氧化物环加成反应生成环状碳酸酯。这是首次报道在不添加助催化剂的情况下使用MOPs作为该反应的催化剂。
