纳米复合材料
离子液体
环加成
环氧化物
化学工程
路易斯酸
选择性
离子键合
可重用性
材料科学
聚合
化学
纳米技术
聚合物
有机化学
催化作用
离子
程序设计语言
工程类
软件
计算机科学
作者
Jiqing Dong,Han Zhang,Jingjing Ma,Kunqi Gao,Fusheng Liu,Yantao Li,Mengshuai Liu
标识
DOI:10.1016/j.jcis.2024.02.048
摘要
The present study, for the first time, reports the fabrication of core-shell poly(ionic liquids)@ZIF-8 nanocomposites through a facile in-situ polymerization strategy. These composites exhibited exceptional structural characteristics including high specific surface areas and the integration of high-density Lewis acid/base and nucleophilic active sites. The structure-activity relationship, reusability, and versatility of the poly(ionic liquids)@ZIF-8 composites were investigated for the cycloaddition reaction between CO2 and epoxide. By optimizing the composites structures and their catalytic performance, PIL-Br@ZIF-8(2:1) was identified as an exciting catalyst that exhibits high activity and selectivity in the synthesis of various cyclic carbonates under mild or even atmospheric pressure or simulated flue gas conditions. Moreover, the catalyst demonstrated excellent structural stability while maintaining its catalytic activity throughout multiple usage cycles. By combining DFT calculations, we investigated the transition states and intermediate geometries of the cycloaddition reaction in different coordination microenvironments, thereby proposing a synergistic catalytic mechanism involving multiple active sites.
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