scholarly journals Computational approaches to understanding reaction outcomes of organic processes in ionic liquids

RSC Advances ◽  
2015 ◽  
Vol 5 (45) ◽  
pp. 35709-35729 ◽  
Author(s):  
Sinead T. Keaveney ◽  
Jason B. Harper ◽  
Anna K. Croft
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Case Studies ◽  
Computational Approach ◽  
Liquid Media ◽  
Computational Approaches

The utility of using a combined experimental and computational approach for understanding ionic liquid media, and their effect on reaction outcome, is highlighted through a number of case studies.

Shifting the equilibrium of methanol synthesis from CO2 by in situ absorption using ionic liquid media

2019 ◽  
Vol 3 (12) ◽  
pp. 3399-3405
Author(s):  
Jenny Reichert ◽  
Stephanie Maerten ◽  
Katharina Meltzer ◽  
Alexander Tremel ◽  
Manfred Baldauf ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Methanol Synthesis ◽  
Liquid Media ◽  
Alkali Salt ◽  
In Situ Absorption

A promising way to increase the methanol yields in CO2 hydrogenation significantly up to 60% by in situ sorption of methanol and water in alkali salt-doped ionic liquids (ILs) is demonstrated.

Rationale for the implementation of reference electrodes in ionic liquids

2016 ◽  
Vol 18 (11) ◽  
pp. 8148-8157 ◽  
Author(s):  
C. Bonnaud ◽  
I. Billard ◽  
N. Papaiconomou ◽  
E. Chainet ◽  
J. C. Leprêtre
Keyword(s):  
Cyclic Voltammetry ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Media ◽  
Reference Electrodes ◽  
The Stability

A comparison between quasi-reference and reference electrodes was carried out in ionic liquid media by cyclic voltammetry. The stability and the reliability of these reference electrodes are discussed.

scholarly journals Metal-Catalyzed Degradation of Cellulose in Ionic Liquid Media

Inorganics ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 78 ◽  
Author(s):  
Tiina Aid ◽  
Mihkel Koel ◽  
Margus Lopp ◽  
Merike Vaher
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Molybdenum Oxide ◽  
Cellulose Degradation ◽  
Biomass Conversion ◽  
Reaction Medium ◽  
Good Activity ◽  
Industrial Chemicals ◽  
Liquid Media ◽  
Metal Catalyzed

Biomass conversion to 5-hydroxymethylfurfural (HMF) has been widely investigated as a sustainable alternative to petroleum-based feedstock, since it can be efficiently converted to fuel, plastic, polyester, and other industrial chemicals. In this report, the degradation of commercial cellulose, the isomerization of glucose to fructose, and the conversion of glucose to HMF in 1-butyl-3-methylimidazolium chloride ([BMIM]Cl]) using metal catalysts (CrCl3, ZnCl2, MgCl2) as well as tungsten and molybdenum oxide-based polyoxometalates (POM) were investigated. Tungsten and molybdenum oxide-based POMs in ionic liquids (IL) were able to degrade cellulose to majority glucose and epimerize glucose to mannose (in the case of the molybdenum oxide-based POM). A certain amount of glucose was also converted to HMF. The tungsten oxide-based POM in IL showed good activity for cellulose degradation but the overall products yield remained 28.6% lower than those obtained using CrCl3 as a catalyst. Lowering the cellulose loading did not significantly influence the results and the addition of water to the reaction medium decreased the product yields remarkably.

Inorganic salts in purely ionic liquid media: the development of high ionicity ionic liquids (HIILs)

2012 ◽  
Vol 48 (30) ◽  
pp. 3656 ◽  
Author(s):  
Ana B. Pereiro ◽  
João M. M. Araújo ◽  
Filipe S. Oliveira ◽  
Carlos E. S. Bernardes ◽  
José M. S. S. Esperança ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Inorganic Salts ◽  
Liquid Media

scholarly journals Electro-synthesis of ammonia from nitrogen at ambient temperature and pressure in ionic liquids

2017 ◽  
Vol 10 (12) ◽  
pp. 2516-2520 ◽  
Author(s):  
Fengling Zhou ◽  
Luis Miguel Azofra ◽  
Muataz Ali ◽  
Mega Kar ◽  
Alexandr N. Simonov ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ambient Temperature ◽  
Ambient Conditions ◽  
Liquid Media ◽  
Faradaic Efficiency ◽  
Temperature And Pressure

High faradaic efficiency reduction of N2 to NH3 is achieved in ionic liquid media under ambient conditions.

Mapping the “Extra Solvent Power, ESP” of Ionic Liquids for Monomers, Polymers and Globular Nanoparticles

2017 ◽  
Author(s):  
Jose A. Pomposo
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Linear Polymers ◽  
Green Solvents ◽  
Ionic Polymers ◽  
First Time ◽  
Solvent Power

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.

Dynamics of Ion Locking in Doubly Polymerized Ionic Liquids

2020 ◽  
Author(s):  
Swati Arora ◽  
Julisa Rozon ◽  
Jennifer Laaser
Keyword(s):  
Dielectric Constant ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ion Pairs ◽  
Polymer Chains ◽  
Ion Motion ◽  
Charged Species ◽  
Broadband Dielectric Spectroscopy ◽  
Covalently Linked ◽  
Insight Into

<div>In this work, we investigate the dynamics of ion motion in “doubly-polymerized” ionic liquids (DPILs) in which both charged species of an ionic liquid are covalently linked to the same polymer chains. Broadband dielectric spectroscopy is used to characterize these materials over a broad frequency and temperature range, and their behavior is compared to that of conventional “singly-polymerized” ionic liquids (SPILs) in which only one of the charged species is attached to the polymer chains. Polymerization of the DPIL decreases the bulk ionic conductivity by four orders of magnitude relative to both SPILs. The timescales for local ionic rearrangement are similarly found to be approximately four orders of magnitude slower in the DPILs than in the SPILs, and the DPILs also have a lower static dielectric constant. These results suggest that copolymerization of the ionic monomers affects ion motion on both the bulk and the local scales, with ion pairs serving to form strong physical crosslinks between the polymer chains. This study provides quantitative insight into the energetics and timescales of ion motion that drive the phenomenon of “ion locking” currently under investigation for new classes of organic electronics.</div>

Ionic Liquid Assisted Synthesis of Some 2-Aminobenzenethiols

2019 ◽  
Vol 16 (7) ◽  
pp. 550-555
Author(s):  
Dinesh K. Jangid ◽  
Keshav L. Ameta ◽  
Surbhi Dhadda ◽  
Anjali Guleria ◽  
Prakash G. Goswami ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Comparative Study ◽  
Maximum Yield ◽  
Efficient Synthesis ◽  
Target Molecules ◽  
Presence And Absence

Ionic Liquid assisted efficient synthesis of some 2-aminobenzenethiols has been reported using three different Ionic Liquids (ILs) namely methylimidazolium tetrafluoroborate [MIM]+[BF4]−, methylimidazolium chloride [MIM]+[Cl]− and methylimidazolium nitrate [MIM]+[NO3]−. A comparative study has been carried out for the synthesis of target molecules in the presence and absence of IL, leading to conclusion that maximum yield has been observed with [MIM]+[BF4]−.

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