Functional ionic liquids based on DABCO: Efficient catalysts for chemical fixation of CO ₂ into cyclic carbonates

Synthetic Communications, Journal Year: 2024, Volume and Issue: 54(17), P. 1450 - 1461

Published: Aug. 20, 2024

A series of basic functional ionic liquids were prepared from 1, 4-diazabicyclo [2.2.2] octane (DABCO) with various halogenated hydrocarbons, then these used as catalysts for the chemical fixation CO2 into cyclic carbonates and influence structure was investigated. The results showed that N atom active center, types anions hydrogen bond catalyst play a key role in cycloaddition reaction epoxides to carbonates. Under mild conditions (T = 100 °C, 1 atm CO2), liquid [DABCO-CH2CH2CH2OH] I best catalytic effect, which has notable advantages such high activity, eco-friendly, ease work-up convenient reuse.

Language: Английский

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Construction of carbon nanotube-multifunctional porous ionic polymer core–shell nanocomposite for efficient conversion of carbon dioxide under co-catalyst free conditions

Fuel, Journal Year: 2024, Volume and Issue: 382, P. 133809 - 133809

Published: Nov. 25, 2024

Language: Английский

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Anchoring Bimetal Zinc–Aluminum Sites on Nitrogen‐Doped Carbon Catalyst for Efficient Conversion of CO₂ Into Cyclic Carbonates

ChemistrySelect, Journal Year: 2024, Volume and Issue: 9(35)

Published: Sept. 18, 2024

Abstract The design and synthesis of efficient carbon‐based materials incorporating multifunctional sites is prospective technology for converting carbon dioxide (CO 2 ) into high‐value chemicals. Here, nitrogen‐doped catalysts (ZnAl‐NC) with bimetal zinc–aluminum were synthesized using nitrogen‐rich polyaniline (PANI) ZnAl‐LDH through hydrothermal in situ pyrolysis methods. ZnAl‐NC‐400, the presence tetrabutylammonium bromide (TBAB), exhibited excellent catalytic activity without solvent, achieving high yields (97.2% or 98.5%) cycloaddition CO propylene oxide (PO) under traditional mild conditions. NH 3 ‐TPD results indicated that enhanced resulted from acid–base synergistic effect, involving Lewis acid Zn Al species abundant base PANI matrix. impact calcination temperature on catalyst morphology, structure, performance was investigated, along recycling adaptability to various epoxides. This work presents an conversion suggests new approaches designing capture utilization.

Language: Английский

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Effects of Mixed Metal Oxide Catalysts on the Synthesis of Cyclic Carbonates from Epoxides under Atmospheric CO₂ Pressure

ACS Omega, Journal Year: 2024, Volume and Issue: 10(1), P. 673 - 682

Published: Dec. 26, 2024

One use of CO2 as a starting material in organic transformations is the synthesis cyclic carbonates and polycarbonates. Due to low reactivity CO2, this transformation must be carried out presence an efficient catalyst. Although several catalytic systems have been developed past decade, reducing pressure at which reaction remains one main challenges process. In context, present work, we describe activity mixed metal oxides from (1 atm) epoxides 70 °C. Using these materials catalysts represents significant benefits since they are very stable, cost-effective, can reused cycles.

Language: Английский

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Design and Synthesis of a Multifunctional g-C3N4@MOF for Enhanced CO2 Cycloaddition: Synergistic Effects of Lewis Acid-Base Sites and Ionic Liquid Functionalization

Journal of Organometallic Chemistry, Journal Year: 2024, Volume and Issue: unknown, P. 123494 - 123494

Published: Dec. 1, 2024

Language: Английский

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