scholarly journals The Biodegradation of Ionic Liquids - the View from a Chemical Structure Perspective

2011 ◽  
Vol 15 (12) ◽  
pp. 1946-1973 ◽  
Author(s):  
Stefan Stolte ◽  
Stephanie Steudte ◽  
Amaya Igartua ◽  
Piotr Stepnowski
Keyword(s):  
Ionic Liquids ◽  
Chemical Structure

Synthesis and Characterization of Alkeyl Imidazolium Ionic Liquids

2014 ◽  
Vol 1048 ◽  
pp. 452-455
Author(s):  
Qiang Wang ◽  
Shi Dong Wang ◽  
Ming Chen Qi ◽  
Shu Liang Zang
Keyword(s):  
Ionic Liquids ◽  
Chemical Structure ◽  
Direct Synthesis ◽  
Synthesis Method ◽  
Structure And Properties ◽  
Spectra Analysis ◽  
Infrared Spectrometer ◽  
Liquid Salts ◽  
Structure Of Matter

Two new imidazole ionic liquid salts, 1-allyl-3-methylimidazolium chloride ([AMIM]Cl) and 1-allyl-3-methy-imidazolium hydrogen sulfate ([EMIM]HSO4), were synthesized with direct synthesis and two-step synthesis method, using a viscosity meter, PH meter, conductivity meter, densitometer, infrared spectrometer determined its chemical structure and properties. The results show that two ionic liquids in the range is slightly different, the trend is roughly same. As the temperature increases, the viscosity decreases, PH gradually increased, the density decreases slightly, can be regarded as constant, the conductivity gradually increased. Ionic liquids of the two IR spectra analysis show its structure and synthetic route consistent with the structure of matter.

scholarly journals Investigating the effect of ligand and cation on the properties of metal fluorinated acetylacetonate based magnetic ionic liquids

2019 ◽  
Vol 43 (28) ◽  
pp. 11334-11341 ◽  
Author(s):  
Muhammad Qamar Farooq ◽  
Deepak Chand ◽  
Gabriel A. Odugbesi ◽  
Marcelino Varona ◽  
Yaroslav Mudryk ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Magnetic Susceptibility ◽  
Ionic Liquids ◽  
Chemical Structure ◽  
Physiochemical Properties ◽  
Magnetic Ionic Liquids

The effect of chemical structure on various physiochemical properties including thermal stability, solvent miscibility, magnetic susceptibility and viscosity is studied for acetylacetone based magnetic ionic liquids.

scholarly journals Evaluating the Toxicity of Ionic Liquids on Shewanella sp. for Designing Sustainable Bioprocesses

2020 ◽  
Vol 7 ◽  
Author(s):  
Hakima Kebaili ◽  
Antonia Pérez de los Ríos ◽  
María José Salar-García ◽  
Víctor Manuel Ortiz-Martínez ◽  
Mostefa Kameche ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Chemical Structure ◽  
Marine Bacterium ◽  
Diffusion Test ◽  
Disk Diffusion Test ◽  
Alkyl Chains ◽  
Key Factor ◽  
Wide Group ◽  
Separation Media ◽  
The Relationship

Ionic liquids (ILs) are widely used as reaction and separation media in many technologies due to their unique and advantageous physicochemical properties. Thus, further studies approaching the study of the toxicity of these materials are required. Moreover, they are utilized in devices in which microorganisms such as Shewanella sp. act as biocatalysts. Thus, in this work, the toxicity of 69 ILs on the marine bacterium Shewanella sp. was tested. Specifically, the ILs analyzed were based on the cations imidazolium, pyridinium, pyrrolidinium, piperidinium, morpholinium, oxazolinium, phosphonium, ammonium, and sulfonium, in combination with different anions. The toxicities of this wide group of ILs on Shewanella sp. were determined using two methods: 1) the agar disk-diffusion test and 2) the growth inhibition test in liquid media. The relationship between toxicity and IL chemical structure was elucidated. A decrease in the hydrophobicity of the alkyl chain length was found to be a key factor to reduce IL toxicity. On the other hand, phosphonium-based ILs containing long alkyl chains were shown to be largely incompatible with Shewanella sp.

Study on the Thermal Stability of Selected Ionic Liquids

2015 ◽  
Vol 220-221 ◽  
pp. 218-223
Author(s):  
Tomasz Jan Kaldonski ◽  
Stanislaw Cudzilo
Keyword(s):  
Higher Education ◽  
Thermal Stability ◽  
Ionic Liquids ◽  
High Temperature ◽  
Thermal Resistance ◽  
Chemical Structure ◽  
Research Project ◽  
High Thermal Resistance ◽  
Thermal Stability Of

Some results of tests of the thermal stability (and volatility) of selected ionic liquids pondered as lubricating substances in comparison with typical lubricating, mineral and synthetic oils, are presented in the article. The research was carried out within the framework of PBR/15–249/2007/WAT–OR00002904 Research Project Financed by the Ministry of Science and Higher Education, during 2007–2011 [1]. The obtained results confirmed high thermal resistance of ionic liquids. It makes it possible to use the liquids as high temperature lubricating substances. At the same time, it has been stated that the thermal resistance of ionic liquids depends on the composition and chemical structure of anion and cation.

Key factor governing the physicochemical properties and extent of proton transfer in protic ionic liquids: ΔpKa or chemical structure?

2019 ◽  
Vol 21 (1) ◽  
pp. 418-426 ◽  
Author(s):  
Muhammed Shah Miran ◽  
Mahfuzul Hoque ◽  
Tomohiro Yasuda ◽  
Seiji Tsuzuki ◽  
Kazuhide Ueno ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ionic Liquids ◽  
Proton Transfer ◽  
Physicochemical Properties ◽  
Chemical Structure ◽  
Protic Ionic Liquids ◽  
Key Factor ◽  
Factor Governing

A series of protic ionic liquids (PILs) are prepared by neutralisation of bis(trifluoromethanesulfonyl)amide acid (H[NTf2]) with various amines, and the properties (especially thermal stability and ionicity) are compared with those of PILs from 1,8-diazabicyclo[5.4.0]-7-undecene (DBU) and various acids.

Untersuchung von Ionischen Flüssigkeiten unter Stromfluss

2021 ◽  
Vol 68 (5) ◽  
pp. 32-40
Author(s):  
Yasmin Korth ◽  
Susanne Beyer-Faiß
Keyword(s):  
Ionic Liquids ◽  
Chemical Structure ◽  
Friction And Wear ◽  
Damage Mechanism ◽  
Conductivity Measurements ◽  
Joint Research ◽  
Electrical Currents ◽  
World Energy ◽  
Joint Research Project ◽  
World Energy Consumption

Every year 23 % of the world energy consumption is caused by friction and wear. Especially now and in future bearings and gear boxes will be exposed to electrical currents so lubricants have to prevent the components from new damage mechanism. The usage of Ionic Liquids as conductible lubricant additives is in discussion for a longer period of time, but right now it was not investigated how these liquids could be affect by electrical currents itself. Generally, lubricants in industry are compounded by base oils, additives, and thickeners. All these ingredients are isolators and not able to discharge electrical currents. In these joint research project, different Ionic Liquids with different conductivities have been exposed to defined electrical currents. For that experiments a new current feed setup has been developed, where the liquids and model lubricants were exposed to electrical currents under temperature control. The influence on the liquids by the current feed was chemically quantified by using IR-Spectroscopy, rheology and conductivity measurements. The Ionic Liquids react, depending on their chemical structure, very different on the current feeds, some of them has been destroyed totally.

Synthesis and Characterization of Supported on Silica Based Ionic Liquids

2015 ◽  
Vol 727-728 ◽  
pp. 34-37
Author(s):  
Li Ying Guo ◽  
Jun Shi ◽  
Jun Hai He ◽  
Ji Yue Huang ◽  
Peng Cheng Huang
Keyword(s):  
Crystal Structure ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Chemical Structure ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Imidazolium Ionic Liquid ◽  
Imidazolium Ionic Liquids ◽  
Methyl Imidazole

Three kinds of functionalized imidazolium ionic liquid, 1-chloride (2-hydroxyethyl) -3-methyl imidazole ionic liquid [HeMIM]Cl, 1-bromide ethylamine-3-methyl imidazolium ionic liquid [AeMIM]Br and chlorinated 1-carboxyethyl-3-methyl imidazolium ionic liquid [CeMIM]Cl, were synthesized firstly. Subsequently, three kinds of supported silicon imidazolium ionic liquids were prepared from above ionic liquids with tetraethoxysilane by sol-gel method. The Chemical structure and crystal structure of the supported on silica based ionic liquids were analyzed by FTIR and XRD.

Modeling surface tension of ionic liquids by chemical structure-intelligence based models

2021 ◽  
pp. 116961
Author(s):  
Seyed-Pezhman Mousavi ◽  
Saeid Atashrouz ◽  
Menad Nait Amar ◽  
Fahimeh Hadavimoghaddam ◽  
Mohammad-Reza Mohammadi ◽  
...  
Keyword(s):  
Surface Tension ◽  
Ionic Liquids ◽  
Chemical Structure
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