An organic polymer-grafted ionic liquid as a catalyst for the cycloaddition of CO2 to epoxides

2017 ◽  
Vol 41 (1) ◽  
pp. 387-392 ◽  
Author(s):  
Dan Xing ◽  
Bin Lu ◽  
Hongxia Wang ◽  
Jingxiang Zhao ◽  
Qinghai Cai
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Benzyl Chloride ◽  
Cyclic Carbonate ◽  
Organic Polymer ◽  
Chemical Fixation ◽  
Imidazolium Ionic Liquids ◽  
Polymer Supported

Chemical fixation of CO2 to a cyclic carbonate catalyzed by benzyl chloride polymer-supported imidazolium ionic liquids.

scholarly journals The Influence of the Nature of Redox-Active Moieties on the Properties of Redox-Active Ionic Liquids and on Their Use as Electrolyte for Supercapacitors

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6344
Author(s):  
Philipp S. Borchers ◽  
Patrick Gerlach ◽  
Yihan Liu ◽  
Martin D. Hager ◽  
Andrea Balducci ◽  
...  
Keyword(s):  
Phase Transition ◽  
Differential Scanning Calorimetry ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Binary Mixtures ◽  
Thermal Characteristics ◽  
The Other ◽  
Scanning Calorimetry ◽  
Imidazolium Ionic Liquids ◽  
Redox Active

In this work, two new redox-active ionic liquids, one based on 2,2,6,6-tetramethylpiperidine-N-oxide and the other based on 4,4′-bipyridine, are synthesized and characterized. A ferrocene-based redox-active ionic liquid is used for referencing the results. All ionic liquids are formed via salt-metathesis from halogenate to bis(trifluoromethylsulfonyl)imide. Their fundamental thermal characteristics are assessed with differential scanning calorimetry. While the imidazolium ionic liquids show no melting point, the phase transition is well observable for the viologen-based ionic liquid. The properties of the neat redox-active ionic liquids and of binary mixtures containing these ionic liquids (0.1 m) and 1-butyl-1-methyl pyrrolidinium-bis(trifluoromethylsulfonyl)imide have been investigated. Finally, the use of these binary mixtures in combination with activated carbon-based electrodes has been considered in view of the use of these redox-active electrolytes in supercapacitors.

scholarly journals Ionic Liquid Catalyzed Per-O-Acetylation and Benzylidene Ring-Opening Reaction

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 642 ◽  
Author(s):  
Mayur Thul ◽  
Yao-Peng Wu ◽  
Yi-Jyun Lin ◽  
Shu-Lin Du ◽  
Hsin-Ru Wu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ring Opening ◽  
Room Temperature ◽  
Catalytic Amount ◽  
Atom Economy ◽  
Selective Catalyst ◽  
Imidazolium Ionic Liquids ◽  
Ring Opening Reaction ◽  
Brönsted Acid

Tunable aryl imidazolium ionic liquids acting as Brønsted acid ionic liquids were found to be efficient catalysts for per-O-acetylation and reductive ring opening of benzylidene acetals. This method requires a truly catalytic amount of the least expensive available ionic liquids that are water-stable and reusable and also stable at room temperature. The reactions were obtained in one hour with good to excellent yields. These reactions can form C−O and C−H bonds with a high atom economy. Furthermore, the ionic liquid is an anomeric selective catalyst in per-O-acetylation and reductive ring opening of benzylidene acetals of sugar moieties.

Ionophilic phosphonium-appended carbopalladacycle catalyst for Suzuki–Miyaura and Heck cross-coupling catalysis

2010 ◽  
Vol 88 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Jocelyn J. Tindale ◽  
Paul J. Ragogna
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Catalyst Activity ◽  
Reaction Medium ◽  
Cross Coupling ◽  
Metal Catalyst ◽  
Phosphonium Salts ◽  
Transition Metal Catalyst ◽  
Imidazolium Ionic Liquids ◽  
Liquid Reaction

An ionic liquid, covalently tethered to an efficient transition-metal catalyst in the presence of an ionic liquid reaction medium, can utilize ionophilic interactions to improve catalyst activity, recyclability, and product isolation while decreasing catalyst leaching. Given the greater stability of phosphonium salts in comparison to imidazolium ionic liquids under basic conditions, phosphonium-tagged oxime carbopalladacycle salts were prepared and employed in both Heck and Suzuki–Miyaura reactions. The desired product was obtained in good yields for up to four catalyst cycles in the case of the Suzuki–Miyaura reaction. While taking advantage of the non-volatile nature of ionic liquids, the product was isolated through simple sublimation from the reaction mixture, eliminating issues associated with catalyst leaching, and the remaining ionic liquid solvent–catalyst mixture was ready for further catalysis.

scholarly journals 2D assemblies of ionic liquid crystals based on imidazolium moieties: formation of ion-conductive layers

2015 ◽  
Vol 39 (6) ◽  
pp. 4471-4477 ◽  
Author(s):  
Junji Sakuda ◽  
Masafumi Yoshio ◽  
Takahiro Ichikawa ◽  
Hiroyuki Ohno ◽  
Takashi Kato
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Crystals ◽  
Ionic Conductivity ◽  
Imidazolium Ionic Liquids ◽  
Ionic Liquid Crystals

Organization of imidazolium ionic liquids into 2D ion-conductive pathways enhances the ionic conductivity of the imidazolium-based ionic liquid crystals.

Plasmonic behavior of ionic liquid stabilized gold nanoparticles in molecular solvents

2017 ◽  
Vol 41 (21) ◽  
pp. 12989-12995 ◽  
Author(s):  
Sachin Thawarkar ◽  
Balu Thombare ◽  
Nageshwar D. Khupse
Keyword(s):  
Gold Nanoparticles ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Surface Plasmon Resonance ◽  
Dielectric Properties ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Facile Synthesis ◽  
Imidazolium Ionic Liquids ◽  
Molecular Solvents

In this paper, we have demonstrated the facile synthesis of stable gold nanoparticles (AuNPs) using imidazolium ionic liquids (ImILs) as a stabilizer as well as a surfactant and their surface plasmon resonance (SPR) in different molecular solvents with varying dielectric properties.

scholarly journals Efficient and Reusable Iron Catalyst to Convert CO2 into Valuable Cyclic Carbonates

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1089
Author(s):  
Ana P. C. Ribeiro ◽  
Peter Goodrich ◽  
Luísa M. D. R. S. Martins
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Catalytic Effect ◽  
Iron Catalyst ◽  
Cyclic Carbonate ◽  
Cyclic Carbonates ◽  
Mild Conditions ◽  
First Time

The production of cyclic carbonates from CO2 cycloaddition to epoxides, using the C-scorpionate iron(II) complex [FeCl2{κ3-HC(pz)3}] (pz = 1H-pyrazol-1-yl) as a catalyst, is achieved in excellent yields (up to 98%) in a tailor-made ionic liquid (IL) medium under mild conditions (80 °C; 1–8 bar). A favorable synergistic catalytic effect was found in the [FeCl2{κ3-HC(pz)3}]/IL system. Notably, in addition to exhibiting remarkable activity, the catalyst is stable during ten consecutive cycles, the first decrease (11%) on the cyclic carbonate yield being observed during the 11th cycle. The use of C-scorpionate complexes in ionic liquids to afford cyclic carbonates is presented herein for the first time.

Polymer supported ionic liquid phases (SILPs) versus ionic liquids (ILs): How much do they look alike

2007 ◽  
pp. 3086-3088 ◽  
Author(s):  
M. Isabel Burguete ◽  
Francisco Galindo ◽  
Eduardo García-Verdugo ◽  
Naima Karbass ◽  
Santiago V. Luis
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Supported Ionic Liquid ◽  
Liquid Phases ◽  
Polymer Supported
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