Electrochemical reduction of aromatic ketones in 1-butyl-3-methylimidazolium-based ionic liquids in the presence of carbon dioxide: the influence of the ketone substituent and the ionic liquid anion on bulk electrolysis product distribution

2015 ◽  
Vol 17 (29) ◽  
pp. 19247-19254 ◽  
Author(s):  
Shu-Feng Zhao ◽  
Mike Horne ◽  
Alan M. Bond ◽  
Jie Zhang
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Electrochemical Reduction ◽  
Product Distribution ◽  
Aromatic Ketone ◽  
Aromatic Ketones ◽  
Bulk Electrolysis ◽  
Electrolysis Product

The yield of electrocarboxylation of aromatic ketone depends on the imidazolium-based ionic liquid anion and the ketone substituent.

scholarly journals Surface structured platinum electrodes for the electrochemical reduction of carbon dioxide in imidazolium based ionic liquids

2015 ◽  
Vol 17 (37) ◽  
pp. 23909-23916 ◽  
Author(s):  
Florin A. Hanc-Scherer ◽  
Miguel A. Montiel ◽  
Vicente Montiel ◽  
Enrique Herrero ◽  
Carlos M. Sánchez-Sánchez
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquids ◽  
Single Crystal ◽  
Electrochemical Reduction ◽  
Platinum Electrodes ◽  
Platinum Single Crystal

The direct CO2 electrochemical reduction on model platinum single crystal electrodes Pt(hkl) is studied in [C2mim+][NTf2−], due to its moderate viscosity, high CO2 solubility and conductivity.

Distillable ionic liquids for a new multicomponent reaction

2007 ◽  
Vol 79 (11) ◽  
pp. 1869-1877 ◽  
Author(s):  
Anthony E. Rosamilia ◽  
Christopher R. Strauss ◽  
Janet L. Scott
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Multicomponent Reaction ◽  
Reaction Medium ◽  
Building Blocks ◽  
Substituted Anilines ◽  
Reaction Sequence ◽  
Unsaturated Ketones ◽  
Direct Preparation

Adducts of dimethylamine and carbon dioxide form a "distillable ionic liquid" (DIMCARB) that may used as both a reaction medium and catalyst in the direct, atom-economical synthesis of useful synthetic building blocks, such as mono-condensed α,β-unsaturated ketones. The utilization of such building blocks in the synthesis of two new classes of versatile macrocycles, by a sequence of condensation reactions (H2O by-product), is described. Investigation into the mechanism of action of DIMCARB catalysis and observation of an aniline impurity arising from a competing reaction sequence led to development of a new multicomponent reaction for the direct preparation of 2- or 4-substituted anilines. Some of the macrocycles and anilines are, respectively, supramolecular host compounds and ligands for the preparation of metal complexes.

Ionic Liquid [Bmim]OH Grafted Catalyst for Cycloaddition of Carbon Dioxide

2014 ◽  
Vol 989-994 ◽  
pp. 676-679 ◽  
Author(s):  
Xue Lan Zhang ◽  
Deng Feng Wang
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Silica Gel ◽  
Propylene Carbonate ◽  
Propylene Oxide ◽  
Heterogeneous Catalysts ◽  
Element Analysis ◽  
Mild Conditions ◽  
Adsorption Desorption

An ionic liquid 1-butyl-3-methylimidazolium hydroxide ([Bmim]OH) was grafted on silica gel by post-grafting method. Such grafted ionic liquids (GILs) which were verified by means of FTIR, element analysis N2adsorption-desorption and TG could be used as highly effective heterogeneous catalysts toward propylene carbonate synthesis through cycloaddition of carbon dioxide with propylene oxide under solventless and mild conditions.

Preparation and Activity of Ionic Liquid Catalysts Grafted on Hydrophobic Silica Gel

2012 ◽  
Vol 476-478 ◽  
pp. 2621-2624
Author(s):  
Xue Lan Zhang ◽  
Deng Feng Wang
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Silica Gel ◽  
Propylene Oxide ◽  
Heterogeneous Catalysts ◽  
N2 Adsorption ◽  
Mild Conditions ◽  
Hydrophobic Silica ◽  
Adsorption Desorption

An ionic liquid 1- (triethoxysilyl) propyl-3-methylimidazolium hydroxide ([Smim]OH) was grafted on three kinds of mesoporous hydrophobic silica gel by means of post-grafting under mild conditions. The catalysts were [Smim]OH/SiO2-MTES (methyltriethoxysilane), [Smim]OH/SiO2-TMCS (trimethylchlorosilane), [Smim]OH/SiO2-CPTEO (triethoxysilyl propyl chloride). Such grafted ionic liquids (GILs), which were characterized by means of FTIR and N2 adsorption-desorption could be used as effective heterogeneous catalysts toward propylene carbonate synthesis through cycloaddition of carbon dioxide with propylene oxide under solventless and mild conditions.

scholarly journals Elucidation of the Roles of Ionic Liquid in CO2 Electrochemical Reduction to Value-Added Chemicals and Fuels

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6962
Author(s):  
Sulafa Abdalmageed Saadaldeen Mohammed ◽  
Wan Zaireen Nisa Yahya ◽  
Mohamad Azmi Bustam ◽  
Md Golam Kibria
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquids ◽  
Reaction Mechanism ◽  
Electrochemical Reduction ◽  
Value Added ◽  
Faradaic Efficiency ◽  
Renewable Source ◽  
Carbon Dioxide Co2 ◽  
Physical And Chemical ◽  
Value Added Products

The electrochemical reduction of carbon dioxide (CO2ER) is amongst one the most promising technologies to reduce greenhouse gas emissions since carbon dioxide (CO2) can be converted to value-added products. Moreover, the possibility of using a renewable source of energy makes this process environmentally compelling. CO2ER in ionic liquids (ILs) has recently attracted attention due to its unique properties in reducing overpotential and raising faradaic efficiency. The current literature on CO2ER mainly reports on the effect of structures, physical and chemical interactions, acidity, and the electrode–electrolyte interface region on the reaction mechanism. However, in this work, new insights are presented for the CO2ER reaction mechanism that are based on the molecular interactions of the ILs and their physicochemical properties. This new insight will open possibilities for the utilization of new types of ionic liquids. Additionally, the roles of anions, cations, and the electrodes in the CO2ER reactions are also reviewed.

scholarly journals Selective monoalkylation of p-tert-butylcalix-[4]-arene in a methyl carbonate ionic liquid

2018 ◽  
Vol 54 (85) ◽  
pp. 12037-12040
Author(s):  
R. E. Whiteside ◽  
H. Q. Nimal Gunaratne ◽  
A. F. V. Muzio ◽  
P. Nockemann
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Methyl Carbonate

Methyl carbonate ionic liquids are shown to readily mono-deprotonate p-tert-butylcalix-[4]-arenes initiating the formation of an organic mono-anionic p-tert-butylcalix-[4]-arate salt, methanol and carbon dioxide.

scholarly journals Ionic Liquids-Functionalized Zeolitic Imidazolate Framework for Carbon Dioxide Adsorption

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2361 ◽  
Author(s):  
Xuyan Song ◽  
Jialin Yu ◽  
Min Wei ◽  
Ran Li ◽  
Xi Pan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Surface Area ◽  
Average Pore Size ◽  
Carbon Dioxide Adsorption ◽  
Zeolitic Imidazolate Frameworks ◽  
Zeolitic Imidazolate Framework ◽  
Average Pore ◽  
Solid Sorbents

Ionic-liquid-functionalized zeolitic imidazolate frameworks (ZIF) were synthesized using the co-ligands of 2-methylimidazole and amine-functionalized ionic liquid during the formation process of frameworks. The resulting ionic-liquid-modified ZIF had a specific surface area of 1707 m2·g−1 with an average pore size of about 1.53 nm. Benefiting from the large surface area and the high solubility of carbon dioxide in ionic-liquid moieties, the synthesized materials exhibited a carbon dioxide adsorption capacity of about 24.9 cm3·g−1, whereas it was 16.3 cm3·g−1 for pristine ZIF at 25 °C under 800 mmHg. The results demonstrate that the modification of porous materials with ionic liquids could be an effective way to fabricate solid sorbents for carbon dioxide adsorption.

Mechanistic insights into carbon dioxide utilization by superoxide ion generated electrochemically in ionic liquid electrolyte

2021 ◽  
Author(s):  
Ahmed Halilu ◽  
Maan Hayyan ◽  
Mohamed Kheireddine Aroua ◽  
Rozita Yusoff ◽  
Hanee F. Hizaddin
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Reaction Mechanism ◽  
Electrochemical Reduction ◽  
Sustainable Use ◽  
Liquid Electrolyte ◽  
Superoxide Ion ◽  
Ionic Liquid Electrolyte ◽  
Carbon Dioxide Utilization ◽  
The One

Understanding the reaction mechanism that controls the one-electron electrochemical reduction of oxygen is essential for sustainable use of the superoxide ion (O2˙−) for CO2 conversion.

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