沸石咪唑盐骨架
环氧丙烷
催化作用
碳酸丙烯酯
咪唑酯
环加成
化学
化学工程
试剂
分子
化学成分
扩散
无机化学
有机化学
物理化学
金属有机骨架
聚合物
环氧乙烷
吸附
共聚物
工程类
物理
热力学
电化学
电极
作者
Maria N. Timofeeva,Ivan А. Lukoyanov,Valentina N. Panchenko,К. И. Шефер,Maxim S. Mel'gunov,Biswa Nath Bhadra,Sung Hwa Jhung
标识
DOI:10.1016/j.mcat.2022.112530
摘要
A series of Zn- and Co containing zeolitic-imidazolate frameworks (ZIFs), such as ZIF-8(Zn)/ZIF-67(Co), MAF-5(Zn)/MAF-5(Co), and MAF-6(Zn)/MAF-6(Co), were investigated as catalysts for the synthesis of propylene carbonate (PC) from propylene oxide (PO) and CO2. The effect of the chemical composition, textural, structural and physicochemical properties on their activity was investigated. It was found that the activity of Zn-containing materials was higher in comparison with Co-based materials. Moreover, the yield of a PC was decreased with increasing Co content in structure of mixed Zn,Co-ZIFs (ZIF-8/ZIF-67) that was related to the accessibility of active centers to reagents and the strength of their interaction with CO2 and propylene oxide. The catalytic performance of Zn-ZIFs was found to improve with increasing the size of pore aperture due to the guest molecule facile diffusion and accessibility of the active site for reagent. In general, based on the results of the present work, the Zn-ZIFs could be considered as promising catalysts for cycloaddition of CO2 to epoxides and thereby opens new paths for further research.
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