Ordered Porous Poly(ionic liquid) Crystallines: Spacing Confined Ionic Surface Enhancing Selective CO<sub>2</sub> Capture and Fixation

et al. 2019

ChemSusChem

Self Cite

133

Section: Resultssupporting

confidence: 88%

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

et al. 2019

ChemSusChem

Self Cite

133

“…[ 32 ] PILs fabricated from quaternization and F‐C alkylation was efficient in the CO 2 fixation, [ 33–36 ] it has gained a mushroom growth and was acting as an alternative for CO 2 fixation. [ 33–47 ] Also PILs based on imidazolium and bipyridine monomer were constructed and exhibited enhanced efficiency for generating of cyclic carbonates in the presence of zinc bromide. [ 48,49 ]…”

Section: Introductionmentioning

confidence: 99%

“…[ 14 ] Therefore, it is urgently necessary to develop novel efficient HBD heterogenous materials for conversion of CO 2 under mild conditions. [ 34,39,40,43,47,50,51 ] Such as PILs tethering hydroxyl and amino acid were constructed, the prominent catalytic performance is ascribed to the synergistic effect of HBD and halogen anions as nucelophilic reagent for opening of epoxides. [ 34,39,40,43 ] Recently reported by Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

Hydroxylamino‐Anchored Poly(Ionic Liquid)s for CO₂ Fixation into Cyclic Carbonates at Mild Conditions

Advanced Sustainable Systems

Zheng

et al. 2020

Catalytic utilization of CO2 addition into chemicals has potential as a strategy for removing CO2 from the atmosphere. In this context the additive‐free catalytic conversion of CO2 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 CO2‐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‐C18]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.

“…[27,28] Recently, porous COFs have been not only defined as splendid sorbents for a variety of gases, especially CO 2 , [29][30][31] but also applied as late-model of heterogeneous catalysts for different reactions. [32][33][34] To date, some COF-based heterogeneous catalysts for CO 2 cycloaddition reactions have been reported, [35][36][37][38][39][40][41][42] while it is still a great challenge to design COFs systems that can catalyze CO 2 conversion under mild and co-catalyst free conditions. As we know, the post-modified approach is a feasible approach to embellish targeted functional sites into the parent skeleton of COFs.…”

Section: Introductionmentioning

confidence: 99%

Metal and Co‐Catalyst Free CO₂ Conversion with a Bifunctional Covalent Organic Framework (COF)

Chen

et al. 2020

ChemCatChem

The excessive growth of CO 2 brings about the global warming and subsequent climate change, which is an increased public concern issue. Currently, the chemical fixation of CO 2 is identified as one of the most effective approaches to reduce and utilize CO 2. Thus, it is a great challenge to rationally design and construct high-efficient catalysts for CO 2 conversion and utilization. Here, a unique metal-free bifunctional COF heterogeneous catalyst was successfully achieved via the post-modified strategy, which simultaneously bears À COOH as Brønsted acidic center and Br À ion as nucleophilic active site. By virtue of abundant porosity, excellent stability, favorable CO 2 adsorption, and dual catalytic sites, this material can efficiently facilitate the coupling reaction of CO 2 with epoxide to form cyclic carbonate without co-catalyst under mild conditions. Moreover, it has excellent reusability, without significant reduction of the catalytic activity after at least five cycles.