Synthesis of Bifunctional Catalysts for the Cycloaddition of CO₂ to Epoxides through an Epoxide‐Driven Strategy

ChemCatChem, Год журнала: 2024, Номер 16(10)

Опубликована: Фев. 8, 2024

Abstract The design of molecular scaffolds bearing multiple functional groups for the activation and ring‐opening epoxides is a crucial challenge synthesis efficient homogeneous heterogeneous catalysts that are used cycloaddition reaction CO 2 to epoxides. Traditional approaches prepare such multifunctional often imply multistep synthetic procedures expensive building blocks. In this work we show bifunctional Lewis acid metal quaternary ammonium halide group can be prepared in just two steps starting from an opportunely designed epoxide precursor by using inexpensive substrates. Such readily accessible catalyst was applied series under atmospheric conditions generally leading quantitative substrate conversion high carbonate selectivities. Importantly, also epoxide‐driven concept developed preparation catalyst, could recyclable systems target reaction.

Язык: Английский

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Catalytic Strategies for the Cycloaddition of CO2 to Epoxides in Aqueous Media to Enhance the Activity and Recyclability of Molecular Organocatalysts

Molecules, Год журнала: 2024, Номер 29(10), С. 2307 - 2307

Опубликована: Май 14, 2024

The cycloaddition of CO2 to epoxides afford versatile and useful cyclic carbonate compounds is a highly investigated method for the nonreductive upcycling CO2. One main focuses current research in this area discovery readily available, sustainable, inexpensive catalysts, catalytic methodologies that allow their seamless solvent-free recycling. Water, often regarded as an undesirable pollutant process, progressively emerging helpful reaction component. On one hand, it serves hydrogen bond donor (HBD) enhance performance ionic compounds; on other aqueous media development diverse protocols can boost or ease recycling molecular catalysts. An overview advances use biphasic systems provided work along with recommendations possible future developments.

Язык: Английский

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CO2 fixation: cycloaddition of CO2 to epoxides by practical metal-free recyclable catalysts

Chemical Communications, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 25, 2024

Recent works on practical and recyclable catalysts for the cycloaddition of CO 2 to epoxides are reviewed with an eye use inexpensive, readily-available, non-toxic materials future emerging designs.

Язык: Английский

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Harnessing the Engineered 2D Triazine-Based Metal-Anchored Covalent–Organic Framework as a Catalyst for Selective Conversion of CO₂ into Value-Added Products at Atmospheric Pressure

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 12(25), С. 9428 - 9445

Опубликована: Июнь 7, 2024

Recently, covalent–organic frameworks (COFs) have emerged as a new catalytic strategy for the fixation of C1 feedstock CO2 into heterocyclic compounds, and these compounds can be utilized production fine chemicals. In this work, we designed manganese-anchored COF material (Mn@COF) via simple, one-pot Schiff base condensation process. The synthesized Mn@COF was successfully examined promising catalyst styrene carbonate (SC) synthesis under temperate reaction conditions. catalyst's inherent properties are well described with aid various analytical spectroscopic techniques, such Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive (EDX), transmission (TEM), N2-sorption, photoelectron (XPS), Py-adsorption, temperature-programmed desorption (TPD) analysis. experimental XRD results in good agreement computational structural simulation outcomes evidently disclose that Mn metal is anchored to nitrogen atom framework based on observed interlayer intermolecular distances. These effectively increase diffusion initial reagents rate medium. bare showed less activity at atmospheric pressure, but exhibited superior toward desired product mild effect different parameters detail investigated, additionally, substrate scope study by using epoxides optimized conditions over catalyst. active sites triazine N covalently synergistically enhanced cycloaddition between oxide. Interestingly, proposed plausible mechanism assistance characterization outputs. Remarkably, its stable physicochemical properties, recycled six successive cycles This idea emphasizes selective presence sustainable

Язык: Английский

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Efficient Selective Catalytic Fixation of CO₂ into Epoxide to Form Cyclic Carbonates Using Sodium Aluminate Engineered Gamma Alumina Catalyst

Applied Organometallic Chemistry, Год журнала: 2024, Номер 38(5)

Опубликована: Март 8, 2024

The anthropogenic carbon dioxide (CO 2 ) fixation and various engineering strategies are gaining very significant attention because of the expansion net‐zero environment in atmosphere. Herein, we designed a sodium aluminate@γ‐alumina (NaAlO @γ‐Al O 3 catalyst by simple facile precipitation impregnation tactics. A series different weight percentage NaAlO materials were successfully synthesized well characterized using advanced analytical spectroscopic techniques such as TGA, XRD, FE‐SEM, TEM/HR‐TEM, FT‐IR, Raman, TPD, XPS analysis. was employed competent for CO under atmospheric pressure reaction conditions. catalytic activity results evidently revealed that cycloaddition achieved 94% styrene oxide conversion 93% selectivity, along with an 87% yield carbonate at 120 °C 6 h. Furthermore, comprehensively examined effect parameters aluminate amount, co‐catalyst temperature, time reaction. Additionally, terminal internal epoxides tested optimized conditions moderate to excellent desired cyclic products. Interestingly, plausible mechanism proposed synthesis surface support characterization experimental results. Remarkably, could be easily recoverable recyclable up six consecutive cycles without declining its initial stable structural physicochemical properties.

Язык: Английский

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Bypassing halide immobilization with cooperative polymers for the cycloaddition of atmospheric CO2 to epoxides

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 155635 - 155635

Опубликована: Сен. 1, 2024

Язык: Английский

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Synthesis of cyclic carbonates from CO2 and epoxides by novel metal and halide-free chiral boron compounds

Tetrahedron, Год журнала: 2025, Номер unknown, С. 134485 - 134485

Опубликована: Янв. 1, 2025

Язык: Английский

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