Knoevenagel冷凝
镧系元素
催化作用
金属有机骨架
化学
环加成
路易斯酸
组合化学
溶剂
吸附
有机化学
离子
作者
Siyang Jin,Yu Fu,Kecheng Jie,Huan Dai,Yunjie Luo,Liang Ye,Chaohui Zhou,Wei Xu
标识
DOI:10.1002/chem.202400756
摘要
Abstract Multimetallic synergistic effects have the potential to improve CO 2 cycloesterification and Knoevenagel reaction processes, outperforming monometallic MOFs. The results demonstrate superior performance in these processes. To investigate this, we created and characterized a selection of single‐component Ln(III)‐MOFs (Ln=Eu, Tb, Gd, Dy, Ho) and high‐entropy lanthanide‐organic framework (HE‐LnMOF) using solvent‐thermal conditions. The experiments revealed that HE‐LnMOF exhibited heightened catalytic efficiency in CO 2 cycloesterification and Knoevenagel reactions compared to single‐component Ln(III) MOFs. Moreover, the HE‐LnMOF displayed significant stability, maintaining their structural integrity after five cycles while sustaining elevated conversion and selectivity rates. The feasible mechanisms of catalytic reactions were also discussed. HE‐LnMOF possess multiple unsaturated metal centers, acting as Lewis acid sites, with oxygen atoms connecting the metal, and hydroxyl groups on the ligand serving as base sites. This study introduces a novel method for synthesizing HE‐LnMOF and presents a fresh application of HE‐LnMOF for converting CO 2 .
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