Hydroxylamino‐Anchored Poly(Ionic Liquid)s for CO 2 Fixation into Cyclic Carbonates at Mild Conditions

作者：Jinwei Zhang, Xiaopeng Li, Zheng Zhu, Tao Chang, Xiying Fu, Yongjing Hao, Xiaocai Meng, Balaji Panchal, Shenjun Qin · 发表于：Advanced Sustainable Systems · 年份：2020 · DOI：10.1002/adsu.202000133 · 被引用次数：69 · 研究领域：Carbon dioxide utilization in catalysis、CO2 Reduction Techniques and Catalysts、Catalysis for Biomass Conversion

Abstract Catalytic utilization of CO 2 addition into chemicals has potential as a strategy for removing CO 2 from the atmosphere. In this context the additive‐free catalytic conversion of CO 2 into cyclic carbonates in the absence of metal and solvents under mild conditions is a major challenge. Herein, a series of hydroxylamino‐tethered polymeric ionic liquids bearing adjustable alkyl length substitutes are constructed from copolymerization of divinyl benzene and vicinal hydroxyl and amino base monomeric ionic liquids synthesized from 1‐glycidyl‐3‐vinylimidazolium bromide with alkyl amine. The polymeric ionic liquids are used in CO 2 ‐epoxide cycloaddition reactions to prepare cyclic carbonates and demonstrate high efficiency and stable reusability without a co‐catalyst under atmospheric pressure and under solvent‐free conditions. The introduction of alkyl groups on an ionic polymer host backbone can accelerate the reaction process. A preliminary kinetic study is performed using [PDVB‐HAVIM‐C 18 ]Br and the activation energy is calculated as 53.2 kJ mol −1 . A hydrogen bonding and Br – ion synergistic catalytic mechanism is proposed to account for the excellent catalytic activity of the synthesized ionic polymer.