Carbon-based Lewis acid-base and Brønsted acid sites for efficient catalytic CO2 fixation under mild conditions

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120004 - 120004

Published: Jan. 1, 2025

Language: Английский

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Boosting CO₂ Catalytic Fixation to Cyclic Carbonates over Aluminum Porphyrin-Based Porous Hyper-Cross-Linked Ionic Polymers via Synthetic Control of Active Site Proximity

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Multifunctionalization of porous organic polymers (POPs) toward cooperative CO2 catalysis has attracted so much attention in recent years, but it still remains a huge challenge to scientists. In this contribution, concise and efficient method construct aluminum porphyrin-based hyper-cross-linked ionic been demonstrated for the first time, which are featured with high surface areas hierarchical structures. Obviously, preparation metalloporphyrin-based tetraphenylmethane-derived three-dimensional structures is beneficial introduction abundant active sites formation By regulating locations amounts make them highly dispersed easily accessible, catalytic activity as-maded catalyst can be greatly improved cycloaddition conversion cyclic carbonates without cocatalysts solvents, providing highest initial turnover frequency up 8400 h-1 heterogeneous catalysts reported date. addition, recovered by filtration reused at least ten times significant decrease activity. This work not only presents promising strategy improve controlling site proximity via different synthetic methods also offers an attractive perspective field conversion.

Language: Английский

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Practical Pyrogallol‐Derived Epoxy Resins via Low‐Temperature Two‐Step Synthesis: Unlocking High Efficiency and Thermal Stability for Sustainable Application

Journal of Applied Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

ABSTRACT As the depletion of fossil resources drives demand for sustainable alternatives, bio‐based epoxy resins (EP) face a critical challenge in balancing processability and mechanical performance. This study presents novel low‐viscosity EP, c‐E3PG, synthesized from renewable pyrogallol via two‐step low‐temperature method. By optimizing reaction conditions, c‐E3PG achieves high yield (65.8%) target compound E3PG (pyrogallol triglycidyl ether) with minimal byproducts, exhibiting viscosity 1500 cps at 25°C—significantly lower than conventional petroleum‐based resins. Curing kinetics analysis reveals low activation energy (70 kJ/mol), enabling efficient crosslinking, while cured resin demonstrates glass transition temperature ( T g ) 145°C, storage modulus E′ 2900 MPa, exceptional electrical insulation properties (breakdown strength: 142.41 kV/mm; volume resistivity: 11.0 × 10 15 Ω·cm). These results highlight c‐E3PG's dual advantages ease processing robust thermomechanical performance, positioning it as scalable, eco‐friendly alternative high‐temperature packaging applications.

Language: Английский

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Asymmetric polymerization strategy for constructing multifunctional triazine-based organic polymers for efficient CO2 cycloaddition

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: 371, P. 133372 - 133372

Published: May 4, 2025

Language: Английский

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A₂B₂-Type Zinc(II) Porphyrin-Modified Organic Polymers with Flexible Linkers for Efficient Fixation of CO₂ to Cyclic Carbonate

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(31), P. 13469 - 13479

Published: July 24, 2024

Two A2B2-type zinc(II) porphyrin-modified organic polymers Poly(ZnEtPpI2/BDDA) and Poly(ZnMePpI2/BDDA) were synthesized by the free-radical copolymerization of flexible 1,4-butanediol diacrylate (BDDA) with novel porphyrins ZnEtPpI2 ZnMePpI2, respectively. The characterizations both carried out successfully. two had abundant dual-function sites (Zn2+ I–) excellent adsorption capacity for solvent, showing high catalytic activity CO2 fixation to cyclic carbonate under conditions 120 °C 1.0 MPa CO2. Specifically, displayed highest a TOF 1480 h–1 cycloaddition epichlorohydrin (ECH) wide applicability different epoxides. Moreover, showed stability could be recycled at least 7 times. Finally, kinetic experiments confirmed that was promising catalyst relatively low activation energy (35.3 kJ/mol) carbonate.

Language: Английский

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Metalloporphyrin- and Phosphonium-Bifunctionalized Porous Organic Polymers for Efficient Synergistic Catalysis of CO₂ Conversion under Mild Conditions

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 21, 2024

Functional porous organic polymers (POPs) have been widely developed as heterogeneous catalysts for carbon dioxide (CO

Language: Английский

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Construction on ionic organic polymers by multi-components reactions: Experimental and kinetics modeling of efficient CO2-fixation and high iodine vapor adsorption

Journal of Industrial and Engineering Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

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A2B2‐zinc(II)porphyrin/divinylbenzene Copolymer as Efficiently Bifunctional Catalyst for Cycloaddition of CO2 with Epoxides

European Journal of Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 8, 2024

Abstract In this work, the A 2 B ‐type Zn‐porphyrin (ZnPorI ) featuring vinyl and imidazolium groups was utilized to prepare porous organic polymers (POPs). The group served as linking unit for copolymerization with rigid divinylbenzene (DVB). introduced iodide ions (I − into ZnPorI /nDVB (n=30, 50) Lewis base. By fine‐tuning DVB ratio, it is possible optimize porosity, morphology, content of Zn‐porphyrin. Owing synergistic effect Zn 2+ I , as‐prepared /30DVB exhibited excellent catalytic activities in cycloaddition carbon dioxide epoxides.

Language: Английский

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