Imidazolium salt-modified porous hypercrosslinked polymers for synergistic CO₂ capture and conversion

Abstract

A new type of imidazolium salt-modified porous hypercrosslinked polymer (BET surface area up to 926 m(2) g(-1)) was reported. These porous materials exhibited good CO2 capture capacities (14.5 wt%) and catalytic activities for the conversion of CO2 into various cyclic carbonates under metal-free conditions. The synergistic effect of CO2 capture and conversion was observed.

Carbon dioxide capture in amorphous porous organic polymers

“…Recently, a new type of imidazolium salt-modified was synthesized by Friedel-Crafts reaction from benzyl halides and subsequently functionalized with N-methylimidazole. 129 POM1-IM possesses a large BET surface area (926 m 2 g -1 ) and shows a good CO 2 capture capacity (3.3 mmol g -1 at 273 K and 1bar). More importantly, this material exhibit much higher activity than the conventional polystyrene resin supported imidazolium salts for the conversion of CO 2 and epoxides to cyclic carbonates, which may be due to the synergistic effect of microporosity of porous materials and imidazolium salts.…”

Imidazolium‐Functionalized Ionic Hypercrosslinked Porous Polymers for Efficient Synthesis of Cyclic Carbonates from Simulated Flue Gas

“…In this work, we demonstrate the facile manipulation of the surface functional groups, porosity, and content of ionic moieties of ionic HCPs in a straightforward solvothermal synthetic route. In general, the ionic HCPs were prepared through either direct copolymerization or post‐modification; the former benefits from simplified steps and gives a high dispersion of ionic moieties . However, hypercrosslinking by Friedel–Crafts alkylation involves an electrophilic attack step, making it difficult to copolymerize these monomers with electron‐withdrawing groups such as N‐heterocyclic cations of ILs .…”

Immobilized protic ionic liquids: Efficient catalysts for CO2 fixation with epoxides

“…In terms of catalyst stability and separation of catalyst, heterogeneous catalysts are superior to the homogeneous ones [44]. Metal oxides [45], modified molecular sieves [46,47], ion-exchange resins [48,49], nanoparticles [50][51][52], Nitrogen-doped porous carbon monolith [53], poly(ionic liquid) [54,55], microporous organic polymers [56,57] and supported catalysts [58][59][60][61][62][63][64] were used to catalyzing synthesis of cyclic carbonate from epoxide and carbon dioxide. However, their application is limited due to low activity, rigorous reaction conditions, unsatisfactory stability, and/or poor reusability.…”