Imidazolium-based polymeric ionic liquids for heterogeneous catalytic conversion of CO2 into cyclic carbonates

Wang, Yinpeng; Nie, Junqi; Lu, Cuifen; Wang, Feiyi; Ma, Chao; Chen, Zuxing; Yang, Guichun

doi:10.1016/j.micromeso.2019.109751

Cited by 71 publications

(40 citation statements)

References 31 publications

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“…4F) appeared at 532.0 and 533.4 eV that assigned to O-H/O and O-H/[X À ] (X ¼ Cl or Br), further conrming the presence of H-bonded water in the VIP-X. 55,56 The N 1s spectra for VIP-X (Fig. 4G) could be tted to three distinct peaks.…”

Section: Resultsmentioning

confidence: 89%

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Facile synthesis of crystalline viologen-based porous ionic polymers with hydrogen-bonded water for efficient catalytic CO₂ fixation under ambient conditions

Zhang

et al. 2020

RSC Adv.

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In this work, we report a series of crystalline viologen-based porous ionic polymers (denoted VIP-X, X ¼ Cl or Br), that have in situ formed dicationic viologens paired with halogen anions and intrinsic hydrogenbonded water molecules, towards metal-free heterogeneous catalytic conversion of carbon dioxide (CO 2 ) under mild conditions. The targeted VIP-X materials were facilely constructed via the Menshutkin reaction of 4,4 0 -bipyridine with 4,4 0 -bis(bromomethyl)biphenyl (BCBMP) or 4,4 0 -bis(chloromethyl) biphenyl (BBMBP) monomers. Their crystalline and porous structures, morphological features and chemical structures and compositions were fully characterized by various advanced techniques. The optimal catalyst VIP-Br afforded a high yield of 99% in the synthesis of cyclic carbonate by CO 2 cycloaddition with epichlorohydrin under atmospheric pressure (1 bar) and a low temperature (40 C), while other various epoxides could be also converted into cyclic carbonates under mild conditions. Moreover, the catalyst VIP-Br could be separated easily and reused with good stability. The remarkable catalytic performance could be attributed to the synergistic effect of the enriched Br À anions and available hydrogen bond donors -OH groups coming from H-bonded water molecules.Scheme 1 Synthetic route to crystalline viologen-based porous ionic polymers VIP-X (X ¼ Cl or Br) with intrinsic H-bonded water molecules via the Menschutkin reaction of 4,4 0 -bipyridine with (a) BCMBP and (b) BBMBP under solvothermal conditions (i.e., CH 3 CN, 100 C, 48 h). This journal isScheme 2 A proposed catalytic reaction mechanism for the cycloaddition of CO 2 with epoxides over the catalyst VIP-Br with Br À anions and H-bonded water molecules.This journal is

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Section: Resultsmentioning

confidence: 89%

“…For the VIP-Br, the Br 3d spectrum (Fig. 4I) displays two strong peaks at 68.4 eV (3d 3/2 ) and 67.4 eV (3d 5/2 ), while no signal for C-Br can be observed, 17,32,56 suggesting that all the Br atoms are in the state of Br À anions within the VIP-Br. These results are consistent with FTIR spectra.…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of crystalline viologen-based porous ionic polymers with hydrogen-bonded water for efficient catalytic CO₂ fixation under ambient conditions

Zhang

et al. 2020

RSC Adv.

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“…Similarly, a series of the cross‐linked polyimidazolium salts containing three‐dimensional contorted adamantane groups and imidazolium functionality (denoted as PIM) were constructed from 1,3,5,7‐tetrakis(4‐(imidazole‐1‐yl)phenyl)adamantane and a variety of benzyl bromides without any additive and catalyst (Scheme ) . The as‐prepared PIM2 exhibited a low BET value of 24.2 m 2 g −1 , and thus the flexibility of the benzyl linkage may cause pore collapse within the network.…”

Section: Design and Synthesis Of Imidazolium‐functionalized Organic Cmentioning

confidence: 99%

Recent Advances on Imidazolium‐Functionalized Organic Cationic Polymers for CO₂ Adsorption and Simultaneous Conversion into Cyclic Carbonates

et al. 2020

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The cycloaddition reaction of CO2 with various epoxides to generate cyclic carbonates is one of the most promising and efficient approaches for CO2 fixation. Typical imidazolium‐based ionic liquids possessing electrophilic cations and nucleophilic halogen anions have been identified as excellent and environmentally friendly candidates for synergistically activating epoxides to convert CO2. Therefore, the feasible construction of a series of imidazolium‐functionalized organic cationic polymers can bridge the gap between homogeneous and heterogeneous catalysis, thereby obtaining highly selective CO2 adsorption and simultaneous conversion ability. This Review describes the recent advancements made with regard to the design and synthesis of this type of polymeric networks having imidazolium functionality. They are considered as an outstanding heterogeneous catalyst for the cycloaddition of CO2 to epoxides. Based on the perspective from the design of building blocks to the synthesis of cationic polymers, the focus mainly lies on how to introduce imidazole units into the material backbone via a covalent linking approach and how to incorporate other active sites capable of activating CO2 and/or epoxides into such polymeric materials.

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“…The authors [136] suggested that, in cycloaddition reactions, CO 2 molecules can be activated at the carbon atom, if the active center is electronically abundant, or at the oxygen atom, if the active center is electron-deficient. Cross-linked polymeric imidazolium salts are highly active in the catalytic cyclization of CO 2 with various epoxides [137]. ILs based on squaramide [138] retain high catalytic activity in this process for at least six cycles.…”

Section: Catalytic Membranes Based On Ionic Liquidsmentioning

confidence: 99%

Membrane Technologies for Decarbonization

Alent’ev

Волков

Воротынцев

et al. 2021

Membr. Membr. Technol.

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The deteriorating environmental situation has stimulated the world community to develop research related to the decarbonization of the economy and hydrogen energy. These two areas are essentially focused on membrane technologies, which play a crucial role in solving key tasks for these areas. This review is devoted to this research. The first part describes various membrane technologies aimed at capturing CO 2 from the most common gas mixtures, primarily containing nitrogen, methane, and hydrogen. In recent years, studies related to the amine purification of CO 2 , including membrane technologies, and the use of porous membranes filled with ionic liquids has also been intensively developed. Electromembrane technologies are also being developed that allow not only capture of CO 2 but also to process it into fuel or valuable chemicals. The course taken by several developed countries, including Russia, for the development of hydrogen energy includes the production, purification of hydrogen, and its conversion into energy. It should be noted that membrane technologies are fundamentally important for the development of each of these areas. Thus, the evolution of hydrogen is possible with the use of polymer membranes, and for deep purification and production of high-purity hydrogen by membrane catalysis; membranes based on palladium alloys are used. Finally, fuel cells are developed to produce energy from hydrogen, the most important part of which are proton or oxygen-conducting membranes.

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Imidazolium-based polymeric ionic liquids for heterogeneous catalytic conversion of CO2 into cyclic carbonates

Cited by 71 publications

References 31 publications

Facile synthesis of crystalline viologen-based porous ionic polymers with hydrogen-bonded water for efficient catalytic CO₂ fixation under ambient conditions

Facile synthesis of crystalline viologen-based porous ionic polymers with hydrogen-bonded water for efficient catalytic CO₂ fixation under ambient conditions

Recent Advances on Imidazolium‐Functionalized Organic Cationic Polymers for CO₂ Adsorption and Simultaneous Conversion into Cyclic Carbonates

Membrane Technologies for Decarbonization

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Imidazolium-based polymeric ionic liquids for heterogeneous catalytic conversion of CO2 into cyclic carbonates

Cited by 71 publications

References 31 publications

Facile synthesis of crystalline viologen-based porous ionic polymers with hydrogen-bonded water for efficient catalytic CO2 fixation under ambient conditions

Facile synthesis of crystalline viologen-based porous ionic polymers with hydrogen-bonded water for efficient catalytic CO2 fixation under ambient conditions

Recent Advances on Imidazolium‐Functionalized Organic Cationic Polymers for CO2 Adsorption and Simultaneous Conversion into Cyclic Carbonates

Membrane Technologies for Decarbonization

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Facile synthesis of crystalline viologen-based porous ionic polymers with hydrogen-bonded water for efficient catalytic CO₂ fixation under ambient conditions

Facile synthesis of crystalline viologen-based porous ionic polymers with hydrogen-bonded water for efficient catalytic CO₂ fixation under ambient conditions

Recent Advances on Imidazolium‐Functionalized Organic Cationic Polymers for CO₂ Adsorption and Simultaneous Conversion into Cyclic Carbonates