Catalytic performance of imidazolium based ILs in the reaction of 1,2-epoxyoctane and carbon dioxide: Kinetic study

Jaiswal, Pooja; Varma, Mahesh N.

doi:10.1016/j.jcou.2016.03.005

Cited by 20 publications

(3 citation statements)

References 36 publications

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“…Indeed, it has been previously reported that the number of carbons of the linear alkyl chain carried by the imidazolium core has an influence in term of reactivity . From methyl to dodecyl, it was observed that the longer the chain, the more reactive the catalyst . To verify that this phenomenon is also true in our case, a comparison between catalyst 1 and a shorter analogue 21 was performed using styrene oxide 2 as a model substrate.…”

Section: Resultssupporting

confidence: 60%

A Thermomorphic Polyethylene‐Supported Imidazolium Salt for the Fixation of CO₂ into Cyclic Carbonates

Grollier

Onida

et al. 2020

Adv Synth Catal

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An imidazolium catalyst supported on thermomorphic polyethylene (PE) was prepared from 1methylimidazole and polyethylene iodide (PEÀ I). The catalyst was characterized by 1 H and 13 C NMR, SEC and MALDI-ToF mass spectrometry. Its catalytic activity was evaluated in the ring-opening of epoxides with carbon dioxide to give cyclic carbonates under solvent-free conditions. The catalyst proved to be active at low catalyst loading (down to 0.1 mol%) and allows the reaction to occur at low CO 2 pressure (1-5 bar) and moderate temperature (100°C). A range of terminal and internal epoxides was converted to the corresponding cyclic carbonates with high yields and selectivities. The recyclability of the catalyst was studied and no significant loss of activity was observed after 5 runs.

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Section: Resultssupporting

confidence: 60%

A Thermomorphic Polyethylene‐Supported Imidazolium Salt for the Fixation of CO₂ into Cyclic Carbonates

Grollier

Onida

et al. 2020

Adv Synth Catal

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“…Kinetic studies show that the CPC yield over FMOF‐IBCIL 0.19 increases over time following a first‐order reaction kinetic with a reaction rate constant of 0.13 h −1 (Figure 3C), demonstrating that the reaction of CO 2 and ECH is multi‐step 55 . By comparing the CPC yield at different time (Figure 3A) and the corresponding reaction rate constant (Figure 3C), in addition, it can be seen that FMOF‐IBCIL 0.19 has a much higher reaction rate than other catalysts.…”

Section: Resultsmentioning

confidence: 98%

De novo assembly of frustrated Lewis pair bearing metal‐organic frameworks for atmospheric CO₂ cycloaddition

Lu,

Wu,

et al. 2023

AIChE Journal

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Porous frustrated Lewis pairs (FLPs) have been demonstrated as cutting‐edge heterogeneous catalysts in acidic–basic catalysis, which, yet faces great challenges in synthesis. Herein, we propose a one‐step de novo assembly strategy for constructing porous FLPs by capping monodentate ionic liquids (ILs) on metal clusters during the synthesis of metal–organic frameworks (MOFs). The capping of ILs makes adjacent metal sites on MOFs transforming to coordinatively‐unsaturated metal Lewis acids, producing FLPs containing Lewis basic Cl− ions from ILs and metal sites. The distribution of ILs on the framework of MOFs endows the catalysts with large surface areas (up to 2125 m2 g−1), open channels and good stability. The porous FLPs behave unprecedented activity for atmospheric CO2 activation and coupling with epoxides (25–40°C, 1 bar, without cocatalyst). This de novo assembly strategy exhibits good universality for synthesizing porous FLPs from different kinds of ILs, paving a facile approach for designing high‐efficiency acidic–basic catalysts.

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“…Based on the Arrhenius equation, by plotting ln k obs versus 1/ T , the activation energies of the cycloaddition of CO 2 with SO over SILEt + Br – and SILBu + Br – were calculated as 65 and 45 kJ·mol –1 , respectively (Figure ). , Based on the difference in the obtained activation energies, it is possible to claim that SILBu + Br – could be more active than SILEt + Br – , which is studied in detail in the next section.…”

Section: Results and Discussionmentioning

confidence: 99%

SBA-15-Supported Imidazolium Ionic Liquid through Different Linkers as a Sustainable Catalyst for the Synthesis of Cyclic Carbonates: A Kinetic Study and Theoretical DFT Calculations

Dokhaee

Ghiaci

Farrokhpour

et al. 2020

Ind. Eng. Chem. Res.

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Various cyclic carbonates were prepared by cycloaddition of carbon dioxide with different epoxides using imidazolium-based catalysts grafted on a mesoporous silica support through 3-aminopropyltrimethoxysilane and Br–(CH2) n –Br (n = 2 or 4) under efficient and mild conditions. The catalysts were characterized by various physicochemical techniques such as magic angle spinning (MAS) NMR, 1H NMR, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Field-emission scanning microscopy (FESEM), thermogravimetric analysis (TGA), and Brunauer–Emmett–Teller (BET). The reactions were conducted under maximum carbon dioxide pressure of 2.0 MPa at the temperature range of 80–140 °C without using any solvent. The influence of different reaction parameters was investigated. The effects of the chain length and different anions on the catalyst activity were also studied. The mechanism of the reaction was investigated theoretically using density functional theory (DFT) calculations in the ONIOM scheme, and the influence of hydrogen bonding and the chain length of the linker on the transition state of the rate-determining step was also studied. The selected catalyst was used in subsequent runs without a significant loss of its reactivity.

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Catalytic performance of imidazolium based ILs in the reaction of 1,2-epoxyoctane and carbon dioxide: Kinetic study

Cited by 20 publications

References 36 publications

A Thermomorphic Polyethylene‐Supported Imidazolium Salt for the Fixation of CO₂ into Cyclic Carbonates

A Thermomorphic Polyethylene‐Supported Imidazolium Salt for the Fixation of CO₂ into Cyclic Carbonates

De novo assembly of frustrated Lewis pair bearing metal‐organic frameworks for atmospheric CO₂ cycloaddition

SBA-15-Supported Imidazolium Ionic Liquid through Different Linkers as a Sustainable Catalyst for the Synthesis of Cyclic Carbonates: A Kinetic Study and Theoretical DFT Calculations

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Catalytic performance of imidazolium based ILs in the reaction of 1,2-epoxyoctane and carbon dioxide: Kinetic study

Cited by 20 publications

References 36 publications

A Thermomorphic Polyethylene‐Supported Imidazolium Salt for the Fixation of CO2 into Cyclic Carbonates

A Thermomorphic Polyethylene‐Supported Imidazolium Salt for the Fixation of CO2 into Cyclic Carbonates

De novo assembly of frustrated Lewis pair bearing metal‐organic frameworks for atmospheric CO2 cycloaddition

SBA-15-Supported Imidazolium Ionic Liquid through Different Linkers as a Sustainable Catalyst for the Synthesis of Cyclic Carbonates: A Kinetic Study and Theoretical DFT Calculations

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A Thermomorphic Polyethylene‐Supported Imidazolium Salt for the Fixation of CO₂ into Cyclic Carbonates

A Thermomorphic Polyethylene‐Supported Imidazolium Salt for the Fixation of CO₂ into Cyclic Carbonates

De novo assembly of frustrated Lewis pair bearing metal‐organic frameworks for atmospheric CO₂ cycloaddition