材料科学
离子液体
沸石咪唑盐骨架
环氧丙烷
环氧化物
催化作用
化学工程
硼酸
基质(水族馆)
金属有机骨架
锌
组合化学
吸附
有机化学
环氧乙烷
聚合物
化学
共聚物
冶金
复合材料
工程类
地质学
海洋学
作者
Jinquan Wang,Xiukai Li,Guangshun Yi,Siew Ping Teong,Shook Pui Chan,Xinglong Zhang,Yugen Zhang
标识
DOI:10.1021/acsami.3c19500
摘要
Noncrystalline zeolitic imidazolate frameworks (ZIFs) tethered with ionic liquids (ILs) were successfully employed as catalysts for mild CO2 conversion into cyclic carbonates for the first time. Notably, noncrystalline ZIFs exhibit outstanding catalytic performance in terms of activity, stability, and substrate suitability. Z3 was obtained through the simultaneous incorporation of a boronic acid group and ILs into its ZIF framework and exhibited a superior catalytic activity. A reaction mechanism for the propylene oxide-CO2 cycloaddition has been proposed, which integrates experimental findings with density functional theory calculations. The results indicate that zinc, ILs, and boronic acid play crucial roles in achieving high activity. Zinc and ILs are identified as key contributors to epoxide activation and ring opening, while boronic acid plays a crucial role in stabilizing the turnover frequency-determining transition states. The simplicity of this ZIF synthesis approach, combined with the high activity, stability, and versatility of the products, facilitates practical and efficient conversion of CO2 and epoxides into cyclic carbonates.
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