Preliminary Assessment of the Sorption of some Alkyl Imidazolium Cations as used in Ionic Liquids to Soils and Sediments

2005 ◽  
Vol 58 (3) ◽  
pp. 170 ◽  
Author(s):  
Piotr Stepnowski
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Environmental Fate ◽  
Hydrophobic Interactions ◽  
Preliminary Assessment ◽  
Imidazolium Ionic Liquid ◽  
Imidazolium Cations ◽  
Soils And Sediments ◽  
Essential Parameter ◽  
Selection Of

The growing interest in the use of ionic liquids may soon result in their presence in the environment. In any evaluation of the environmental fate of these compounds, their sorption on soil is an essential parameter. This paper reports data on the sorption of ionic liquids on selected soils and marine sediments. Batch-equilibrium adsorption tests were conducted on a selection of imidazolium ionic liquid entities. All the compounds were strongly sorbed on all the soils under study. It seems that, regardless of the hydrophobic interaction with organic matter, non-hydrophobic interactions contribute to the sorption of these compounds to soils and sediments, which usually tends to occur with highly polar ionized groups such as quaternary moieties.

scholarly journals Raman Spectroscopy Characterization of Dissolved Polysilicon Byproduct SiCl4 in Ionic Liquids

2018 ◽  
Vol 2018 ◽  
pp. 1-5
Author(s):  
Cheng Cheng ◽  
Chenglong Zhang ◽  
Jiachao Jiang ◽  
En Ma ◽  
Jianfeng Bai ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Alkyl Chain ◽  
Silicon Tetrachloride ◽  
Imidazolium Ionic Liquid ◽  
Imidazolium Cations ◽  
Chain Lengths

Silicon tetrachloride (SiCl4) is the main byproducts of the polysilicon industries. The dissolution behaviors of SiCl4 in imidazolium ionic liquid, including [Bmim]OTf, [Bmim]NTf2, [Hmim]NTf2, and [Omim]NTf2, were investigated for recycling Si from SiCl4. Raman spectroscopy was used to understand the combination between the ionic liquid and SiCl4, and the conductivity of ionic liquids in different conditions was determined. The results indicated that [Bmim]NTf2 exhibited a better SiCl4 dissolving capacity compared to [Bmim]OTf, longer alkyl chain lengths in the imidazolium cations of the ionic liquids exhibited a better performance in dissolving SiCl4, and [Bmim]NTf2 : PC = 1 : 2 exhibited the best conductivity. In addition, molecular bondings between C-Cl, Si-O-Si, and C-Si were formed between the ionic liquids and SiCl4.

Synthesis and application of Co(salen) complexes containing proximal imidazolium ionic liquid cores

2012 ◽  
Vol 90 (1) ◽  
pp. 60-70 ◽  
Author(s):  
Swapnil Sonar ◽  
Kenson Ambrose ◽  
Arthur D. Hendsbee ◽  
Jason D. Masuda ◽  
Robert D. Singer
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Model Compound ◽  
Veratryl Alcohol ◽  
Oxidation Catalysts ◽  
Imidazolium Ionic Liquid ◽  
Lignin Model Compound ◽  
Salen Complexes ◽  
Lignin Model ◽  
Salen Ligand

Ionic ligands derived from a salen ligand containing two proximal 1,3-disubstituted imidazolium ionic liquid cores form cobalt(III) complexes capable of selectively oxidizing veratryl alcohol, a lignin model compound, to veratraldehyde using air as the source of oxygen. These complexes are easy to prepare, inexpensive, water stable, and soluble in ionic liquids, making them viable candidates for use as oxidation catalysts.

scholarly journals Ionic liquid promoted Diels-Alder Reaction between anthrone and maleimides

2010 ◽  
Vol 8 (2) ◽  
pp. 356-360 ◽  
Author(s):  
Nitin Mirgane ◽  
Sandip Kotwal ◽  
Anil Karnik
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Alder Reaction ◽  
Dual Role ◽  
Diels Alder ◽  
Environmentally Benign ◽  
Green Solvents ◽  
Imidazolium Ionic Liquid ◽  
Diels Alder Reaction

AbstractIonic liquids (IL) are gaining importance as green solvents. Imidazolium ionic liquid [bmim]+[Cl]−, an environmentally benign solvent, was found to promote the Diels-Alder reaction between anthrone and maleimides at room temperature with excellent yields. The ionic liquid played a dual role as solvent and catalyst.

scholarly journals Comparison of Pure and Hybrid Nanoparticles using Ionic Liquid as a Capping agent

2020 ◽  
Vol 13 (4) ◽  
pp. 413-419
Author(s):  
N. Santhi ◽  
K. Rajathi ◽  
S. Sridhar
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Electron Microscope ◽  
Hybrid Nanoparticles ◽  
Spectral Studies ◽  
Imidazolium Ionic Liquid ◽  
High Biological Activity ◽  
X Ray ◽  
Cubic Form ◽  
Co Precipitation

Ionic liquids are exceptional chemical compounds that are used in many areas of modern science. Due to their highly adjustable nature and incomparable properties, ionic liquids have become key players in the areas of synthesis, catalysis, extraction, electrochemistry, analysis, biotechnology, etc. In addition to the physical and chemical properties of ionic liquids, their high biological activity has attracted considerable attention from biochemists, ecologists and medical professionals. Due to the properties mentioned above, an imidazolium ionic liquid solvent was used for the synthesis of nanostructure nanoparticles. In the present work, cubic form of pure Fe2O3, spherical nature of pure Ag (0) and hexagonal shaped hybrid Ag- Fe2O3 were successfully synthesized by a simple co-precipitation, reduction and co-precipitation processes. The synthesized nanoparticles were characterized in detail by spectral studies such as IR, XRD, SEM, EDX and TEM analysis. The size and shape of the particles were performed by X-ray Diffraction (XRD), Scanning Electron Microscope (SEM) techniques and Transmission Electron Microscope (TEM) techniques. Quality quantity and purity of the products was checked by Energy Dispersive X-Ray Analysis (EDX).

scholarly journals Experimental investigations on electrorheological properties of lubricating oils containing ionic liquid. Part. 1. Investigations with modified Brookfield DV-III Ultra Viscosimeter

2019 ◽  
Vol 68 (3) ◽  
pp. 35-63
Author(s):  
Jarosław Juda ◽  
Tomasz Jan Kałdoński ◽  
Tadeusz Kałdoński
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Electric Fields ◽  
Experimental Investigations ◽  
Lubricating Oils ◽  
Liquid Part ◽  
Special Stand ◽  
Electrorheological Properties ◽  
Selection Of

The results of experimental investigations on electrorheological (ER) properties of lubricating oils which contain ionic liquids, are presented in this article. The investigations were carried out on the special stand which was projected for this aim. On this stand there was used the modified Brookfield viscosimeter. Electrorheological properties of two mixtures were tested, i.e., silicone damping liquid GP-1 which is polimethylsiloksane mixture containing 2% (v/v) of ionic liquid CJ 001, i.e., tetrafluoroboran 1-methyl-3-octyloxymethylimidazolium as well as base polialfaolefine oil PAO-6 which contains 2% (v/v) of ionic liquid CJ 008, i.e., trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide. Selection of components of both mixtures was based on the results of investigations of miscible and on evaluation of basic phys-chem properties. The investigations showed that the made mixtures have generated the ER effect, but it was short-lived effect, suggesting the changes of inner structure of these mixtures. Therefore, we have planned the next investigations, among others dielectric spectroscopy and microscope observations in situ of these mixtures in external electric fields. The aim of those investigations will be to record the fading ER effect and to understand this mechanism. Keywords: electrorheological effect, homogenous mixtures, lubricants, ionic liquids

scholarly journals Properties of Dicationic Disiloxane Ionic Liquids

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2949
Author(s):  
Vladimir G. Krasovskiy ◽  
Gennady I. Kapustin ◽  
Olga B. Gorbatsevich ◽  
Lev M. Glukhov ◽  
Elena A. Chernikova ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Hydrolytic Stability ◽  
Melting Points ◽  
Imidazolium Cations ◽  
Dicationic Ionic Liquids

A number of dicationic ionic liquids with a disiloxane linker between imidazolium cations and bis(trifluoromethylsulfonyl)imide anion were synthesized and characterized. Melting points, viscosity, and volatility in a vacuum were measured; the thermal and hydrolytic stability of ionic liquids were also studied. The dependence of the properties on the structure of substituents in the cation of the ionic liquid was demonstrated.

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.

scholarly journals PROPERTIES OF 1-BUTYL-3-METHYLIMIDAZOLIUM BROMIDE IONIC LIQUID AND ITS BLENDS WITH WATER AND BROMIDES OF SILVER, COPPER AND TANTALUM

2018 ◽  
Vol 59 (6) ◽  
pp. 89
Author(s):  
Elena P. Grishina ◽  
Ludmila M. Ramenskaya
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Intramolecular Interactions ◽  
Crystalline Hydrate ◽  
Potential Range ◽  
Phase System ◽  
Glass Temperature ◽  
Green Solvents ◽  
Imidazolium Cations ◽  
Electrochemical Window

Ionic liquids with N,N¢-dialkylimidazolium cation characterized now as "green" solvents are investigated intensively to find their practical application. In this research the physical-chemical, electrochemical and corrosion properties of 1-butyl-3-methylimidazolium bromide (BMImBr) and its blends with water and bromides of silver (I), cupper (II) and tantalum (V) were studied. BMImBr is a hygroscopic ionic liquid and in depending on a water content can exists as a solid, liquid, metastable supercooled melt, and two-phase system – liquid and crystalline hydrate of BМImBr´0.5Н2О composition. At 1:1 components ratio the structural transformation of the melt (СН2О<50 mol%) « the solution (СН2О>50 мол.%) was observed. The BMImBr ionic liquid is a good solvent towards bromides of silver (I), cupper (II) and tantalum (V). These salts destroy the inter- and intramolecular interactions of BMImBr and generate the complex metal-containing ions with Br- anion of ionic liquid. As a result the glass temperature and the density increased, the melting point decreased and on isotherms of dynamic viscosity and specific electro conductivity a distinct minimum was observed at the low concentration range of the salt. Electrochemical window of BMImBr is 1.9 V and it is limited by bromide ions oxidation in the anodic potential range and by imidazolium cations reduction in the cathodic potential range. Additions of the water and the metals salt are an electrochemical active. In their presence the redox processes proceeds inside of the electrochemical window and the discharge-ionization process is the limiting steps. From IL studied the thin films of silver and copper can be deposited with good adhesion on metal substrates including tantalum and titanium. Investigated ionic liquids are a corrosive fluid, and corrosion of the metal increases dramatically in the presence of the same cations.

scholarly journals Amphiphilic Ionic Liquid Induced Fusion of Phospholipid Liposomes

2020 ◽  
Author(s):  
Sandeep Kumar ◽  
Navleen Kaur ◽  
Venus Singh Mithu
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Membrane Fusion ◽  
Solid State Nmr ◽  
Structural Integrity ◽  
Cellular Membrane ◽  
Phospholipid Membrane ◽  
Imidazolium Cations ◽  
Phospholipid Liposomes ◽  
Potential Applications

Membrane fusion is a key biological phenomenon with potential applications in biotechnology. In this work, we provide biophysical and structural evidence that liposomes composed of POPC/POPG phospholipids undergo fusion in the presence of ionic liquids containing 1-alkyl-3-methyl-imidazolium cations. The fusion phenomenon is confirmed using dynamic light scattering based size measurements, and Fluorescence based dye leakage and lipid mixing assays. <sup>1</sup>H-<sup>1</sup>H NOESY measurements using solid-state NMR spectroscopy were performed to obtain insights into fusion mechanism. It is found that ionic liquid induced splaying of phospholipid chains is crucial for overcoming the hydration barrier between the merging bilayers. Also, transiently lived fusion-holes are formed at the initial stages of bilayer mixing resulting in a leaky fusion phenomenon. <br><br>Although considered as “green” alternatives to conventional solvents, ionic liquids can exhibit cytotoxicity by altering the structural integrity of cellular membrane. Our study provides mechanistic details of the evolution of phospholipid membrane structure resulting in membrane fusion when subjected to increasing ionic liquid concentrations. We believe that findings of this study will further our understanding of ionic liquids induced cytotoxicity and non-protein assisted membrane fusion. <br><br>

Antibiofilm activity of tert-BuOH functionalized ionic liquids with methylsulfonate counteranions

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 68136-68142 ◽  
Author(s):  
Govinda R. Navale ◽  
Mahesh S. Dharne ◽  
Sandip S. Shinde
Keyword(s):  
Antimicrobial Activity ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Biofilm Formation ◽  
Alkyl Chain ◽  
Antibiofilm Activity ◽  
Imidazolium Ionic Liquid ◽  
Potential Antimicrobial Activity

Thetert-BuOH functionalized and dodecyl alkyl chain bearing imidazolium ionic liquid [C12-tOHim][OMs] significantly prevented biofilm formation ofS. epidermidisand showed potential antimicrobial activity.

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