Ionic liquid-based advanced porous organic hyper-crosslinked polymers (ILHCPs) for CO2 capture and conversion

Abstract

Ionic liquids (ILs) and hyper-crosslinked polymers (HCPs) have attracted many attentions as tunable sorbents and catalysts owing to their unique properties. Their composites, ionic liquid‐based hyper-crosslinked polymers (ILHCPs), with predesignable structures and customizable functionalities, have a promising development since 2015. However, reviews regarding the composites of ILs and HCPs have not been reported, especially based on the viewpoint of ILs. This critical review summarizes the synthetic strategies based on the synthesis of ILs and HCPs, and the types of structures of ILHCPs as well as their future synthesis directions are proposed for the first time. The detail information including physical properties and CO2 capture capacities of these ILHCPs are summarized to obtain the general relationships for further designing the efficient ILHCPs adsorbents. Furthermore, CO2 conversions into value-added chemicals via (1) N-formylation of N-methylaniline and (2) cycloaddition of epoxide are briefly introduced. Moreover, this review briefly highlights the opportunities and challenges faced by rapidly developing but still in the early stage of ILHCPs. It is expected that this article will play a role in “Turning Bricks into Jade” in the fields of advanced functional materials for CO2 capture and conversion.