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Hydroxylamino‐Anchored Poly(Ionic Liquid)s for CO 2 Fixation into Cyclic Carbonates at Mild Conditions
Author(s) -
Zhang Jinwei,
Li Xiaopeng,
Zhu Zheng,
Chang Tao,
Fu Xiying,
Hao Yongjing,
Meng Xiaocai,
Panchal Balaji,
Qin Shenjun
Publication year - 2021
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.202000133
Subject(s) - ionic liquid , catalysis , chemistry , bromide , alkyl , epoxide , ionic bonding , polymer chemistry , monomer , solvent , polymer , inorganic chemistry , organic chemistry , ion
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.