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

Abstract

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.

Pyrene-based ammonium bromides combined with g-C3N4for the synergistically enhanced fixation reaction of CO2and epoxides

“…According to previous reports, the xation reaction was described as pseudo rst order reaction on the ECH concentration. [59][60][61][62] Then, the equation was supported as eqn ( 3) and ( 4), where k is the rate constant, t is the reaction time and x is the conversion yield.…”

Preparation of poly(ionic liquid)/multi-walled carbon nanotube fillers using divinylbenzene as a linker to enhance the impact resistance of polyurethane elastomers

“…The peak at 3085 cm À1 belongs to the C]C stretching vibration in the benzene ring. 27,28 These peaks are all reected in the FTIR spectra of C-MWCNTs, indicating that the surface polymers of MWCNTs exist as copolymers. Fig.…”

A Review on Ionic Liquid Gas Separation Membranes

“…Various attempts successfully yielded PILs incorporating polyepoxide building blocks [ 181 , 182 , 183 , 184 , 185 ]. Most of the research uniting PILs and epoxides focuses on PILs usage as catalysts for the fixation of CO 2 by cycloaddition to form cyclic carbonates [ 186 ]. Nevertheless, epoxide polymerization into S-G PILs produced facilitated transport membranes with amino groups as fixed-carrier sites [ 145 , 187 , 188 , 189 ].…”