scholarly journals Highly Active CO2 Fixation into Cyclic Carbonates Catalyzed by Tetranuclear Aluminum Benzodiimidazole-Diylidene Adducts

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 2
Author(s):  
Ángela Mesías-Salazar ◽  
Yersica Rios Yepes ◽  
Javier Martínez ◽  
René S. Rojas
Keyword(s):  
Carbon Dioxide ◽  
Co2 Fixation ◽  
Cyclic Carbonate ◽  
Spectroscopic Methods ◽  
Cyclic Carbonates ◽  
Efficient Catalyst ◽  
Highly Active ◽  
Carbonate Formation ◽  
Tetrabutylammonium Iodide

A set of tetranuclear alkyl aluminum adducts 1 and 2 supported by benzodiimidazole-diylidene ligands L1, N,N’-(1,5-diisopropylbenzodiimidazole-2,6-diylidene)bis(propan-2-amine), and L2, N,N’-(1,5-dicyclohexyl-benzodiimidazole-2,6-diylidene)dicyclohexanamine were synthetized in exceptional yields and characterized by spectroscopic methods. These compounds were studied as catalysts for cyclic carbonate formation (3a–o) from their corresponding terminal epoxides (2a–o) and carbon dioxide utilizing tetrabutylammonium iodide as a nucleophile in the absence of a solvent. The experiments were carried out at 70 °C and 1 bar CO2 pressure for 24 h and adduct 1 was the most efficient catalyst for the synthesis of a large variety of monosubstituted cyclic carbonates with excellent conversions and yields.

Bimetallic scorpionate-based helical organoaluminum complexes for efficient carbon dioxide fixation into a variety of cyclic carbonates

2020 ◽  
Vol 10 (10) ◽  
pp. 3265-3278 ◽  
Author(s):  
Marta Navarro ◽  
Luis F. Sánchez-Barba ◽  
Andrés Garcés ◽  
Juan Fernández-Baeza ◽  
Israel Fernández ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Cyclic Carbonate ◽  
Carbon Dioxide Fixation ◽  
Cyclic Carbonates ◽  
Carbonate Formation ◽  
Aluminum Complexes

The binuclear aluminum complexes [AlR2(κ2-NN′;κ2-NN′)AlR2] with TBAB/PPNCl behave as excellent systems for cyclic carbonate formation from CO2 with challenging epoxides.

Hydroxyl-anchored covalent organic crown-based polymers for CO2 fixation into cyclic carbonates at mild condition

2021 ◽  
Author(s):  
Yongjing Hao ◽  
Xiuli Yan ◽  
Tao Chang ◽  
Xiaohuan Liu ◽  
Lianwei Kang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Mild Condition ◽  
Co2 Fixation ◽  
Cyclic Carbonates ◽  
Organic Polymers ◽  
Carbon Dioxide Co2

The covalent organic polymers (COPs) are a kind of promising materials for carbon dioxide (CO2) reutilization. Herein, a series of covalent organic crown-based polymers (COCP-H, COCP-OH, COCP-CH3, COCP-Bu) were designed...

Intermolecular proton transfer in cyclic carbonate synthesis from epoxide and carbon dioxide catalyzed by azaphosphatranes: a DFT mechanistic study

RSC Advances ◽  
2015 ◽  
Vol 5 (16) ◽  
pp. 12382-12386 ◽  
Author(s):  
Zhiqiang Zhang ◽  
Liancai Xu ◽  
Wenkai Feng
Keyword(s):  
Carbon Dioxide ◽  
Proton Transfer ◽  
Dft Calculations ◽  
Cyclic Carbonate ◽  
Solvent Free ◽  
Mechanistic Study ◽  
Cyclic Carbonates ◽  
Intermolecular Proton Transfer

The activity of azaphosphatranes, novel types of non-metal and solvent-free catalysts for the synthesis of cyclic carbonates from epoxides and CO2, is unraveled by DFT calculations.

A heteropolyacid-based ionic liquid immobilized onto fibrous nano-silica as an efficient catalyst for the synthesis of cyclic carbonate from carbon dioxide and epoxides

2015 ◽  
Vol 17 (5) ◽  
pp. 3059-3066 ◽  
Author(s):  
Seyed Mohsen Sadeghzadeh
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Cyclic Carbonate ◽  
Nano Silica ◽  
Efficient Catalyst

A heteropolyacid-based ionic liquid immobilized onto fibrous nano-silica as an efficient catalyst for the synthesis of cyclic carbonate from carbon dioxide and epoxides.

g-C3N4 and tetrabutylammonium bromide catalyzed efficient conversion of epoxide to cyclic carbonate under ambient conditions

2017 ◽  
Vol 41 (24) ◽  
pp. 14839-14842 ◽  
Author(s):  
Tanmoy Biswas ◽  
Venkataramanan Mahalingam
Keyword(s):  
Tetrabutylammonium Bromide ◽  
Cyclic Carbonate ◽  
Cyclic Carbonates ◽  
Ambient Conditions ◽  
Efficient Catalyst ◽  
Efficient Conversion

A g-C3N4 and n-Bu4N+Br− combination was found to be an efficient catalyst for the conversion of epoxides to cyclic carbonates under CO2 filled balloon conditions.

Synthesis of amino-phenolate manganese complexes and their catalytic activity in carbon dioxide activation and oxidation reactions

2020 ◽  
pp. 1-7
Author(s):  
Ali I. Elkurtehi ◽  
Francesca M. Kerton
Keyword(s):  
Carbon Dioxide ◽  
Variable Temperature ◽  
Styrene Oxide ◽  
Aerobic Oxidation ◽  
Kinetic Studies ◽  
Cyclic Carbonate ◽  
Oxidation Reactions ◽  
Co Catalyst ◽  
Carbonate Formation ◽  
Solvent Free Conditions

Two manganese(III) compounds were studied as catalysts for the reaction of carbon dioxide with propylene oxide, styrene oxide, and cyclohexene oxide, and formed cyclic carbonate products selectively under solvent free conditions in the presence of an ionic co-catalyst such as TBAB or PPNCl. Variable temperature kinetic studies allowed the activation energy for propylene carbonate formation to be determined (64 kJ mol−1). The catalysts showed good stability in these reactions and overall turnover numbers (TON) of up to 6000 were observed. The complexes showed low activity for the aerobic oxidation of 4-methyoxybenzylalcohol to the corresponding aldehyde, achieving up to 40% conversion in 72 h. However, near quantitative conversion of 1,2-diphenyl-2-methoxyethanol to provide up to 90% yield of benzaldehyde could be achieved over the course of 5 days. Both complexes showed similar reactivity in the two catalytic processes, and this is likely due to the weakly coordinating nature of the pendant donor within the tetradentate ligand.

An efficient CO2 fixation reaction with epoxides catalysed by in situ formed blue vanadium catalyst from dioxovanadium(+5) complex: moisture enhanced and atmospheric oxygen retarded catalytic activity

2020 ◽  
Vol 44 (6) ◽  
pp. 2547-2554 ◽  
Author(s):  
Rakhimoni Borah ◽  
Naranarayan Deori ◽  
Sanfaori Brahma
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Activity ◽  
Co2 Fixation ◽  
Atmospheric Oxygen ◽  
Carbon Dioxide Fixation ◽  
Vanadium Catalyst ◽  
Cyclic Carbonates ◽  
Mild Conditions ◽  
Fixation Reaction

In situ formed vanadium(+4) species catalyzed carbon dioxide fixation reaction, leading to 99% conversion of epoxides to cyclic carbonates under mild conditions is reported here, along with the study on the in situ formed catalyst to some extent.

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