174899-86-6Relevant articles and documents
Silylated quaternary ammonium salts-ionic liquids with hydrophobic cations
Ko?elj, Matja?,Guerfi, Abdelbast,Zaghib, Karim
, p. 15964 - 15971 (2014)
Another class of ionic liquids was obtained by a combination of bis(perfluoroalkylsulfonyl)amide anions and O-silylated choline like cations. The protection of the hydrophilic hydroxyl group of hydroxyalkyl substituted quaternary ammonium salts with a trialkylsilyl group changes cations' properties from hydrophilic to hydrophobic; both constituents (cations and anions) of resulting ionic liquids have a hydrophobic character. Their essential physical and chemical properties were investigated. Moderate viscosity and conductivity of ionic liquids follow the Vogel-Tammann-Fulcher model of their dependency on the temperature. All ionic liquids show similar electrochemical stability as anticipated from CV measurements. The cathodic stability for most compounds is below 0 V vs. Li/Li+, and anodic decomposition starts typically over more than 5 V vs. Li/Li+. These properties suggest that these ionic liquids have potential for the preparation of electrolytes for high voltage lithium batteries. This journal is
Liquid-liquid equilibrium data for {Heptane + aromatic + 1-(2-Hydroxyethyl)-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide ([hemim][NTf2])} ternary systems
Ebrahimi,Ahmadi,Safekordi,Fateminasab,Mehdizadeh
, p. 197 - 204 (2014)
1-(2-Hydroxyethyl)-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquid ([hemim][NTf2]) was synthesized as a new functionalized ionic liquid to study the effect of addition of the hydroxyl group to the imidazolium cation on aliphatic/aromatic separations. For this purpose, liquid-liquid equilibrium (LLE) data for {heptane + toluene or benzene + 1-(2-hydroxyethyl)-3-methylimidazolium bis (trifluoromethylsulfonyl)imide ([hemim][NTf2])} systems were measured at 313.2 K and atmospheric pressure. The measured LLE data were correlated using three basically distinct thermodynamic models; that is, nonrandom two-liquid (NRTL), Othmer-Tobias, and Hand correlations. Results show that there is good agreement between correlated and experimental data. Our experimental results indicate that the addition of the hydroxyl group to imidazolium cation significantly enhances the performance of the ionic liquid in terms of selectivity.
Bis(trifluoromethylsulfonyl)amide based "polymeric ionic liquids": Synthesis, purification and peculiarities of structure-properties relationships
Shaplov, Alexander S.,Lozinskaya, Elena I.,Ponkratov, Denis O.,Malyshkina, Inna A.,Vidal, Frederic,Aubert, Pierre-Henri,Okatova, Ol'ga V.,Pavlov, George M.,Komarova, Lidiya I.,Wandrey, Christine,Vygodskii, Yakov S.
, p. 74 - 90 (2011)
A series of bis(trifluoromethylsulfonyl)amide based "polymeric ionic liquids" (PILs) as high molecular mass analogues of the corresponding imidazolium, ammonium and pyrrolidinium ionic liquids (ILs) was synthesized with high purity and fully characterized including electrochemical properties. The PILs differed by the nature of the cation, the quantity of the ionic centers in each monomer repeating unit, and the alkyl length of the spacer. Two novel ionic liquid like monomers (ILMs), namely 1,3-bis(N,N,N-trimethylammonium)-2- propylmethacrylate bis(trifluoromethylsulfonyl) amide (ILM-2) and N-[(2-methacryloyloxy)-ethyl]-N-methylpyrrolidinium bis(trifluoromethylsulfonyl) amide (ILM-4) were synthesized and characterized. Optimal conditions for the free-radical polymerization of the ILMs were identified for the first time. It was demonstrated that, among the tested organic solvents, 1-methyl-3- ethylimidazolium bis(trifluoromethylsulfonyl)amide IL was the best reaction medium in terms of the achievement of high polymer yields and molecular masses. For the first time, the influence of the residual monomer presence inside the PIL film on the resultant conductivity was clearly shown. The impact of the molecular mass of the PILs on the ionic conductivity was firstly studied as well. Finally, the copolymerization of ILMs with poly(ethylene glycol)dimethacrylate (PEGDM) was carried out yielding tight elastic films with the highest conductivity equal to 3.2 × 10-6 S/cm at 25°C.
Ecofriendly fast synthesis of hydrophilic poly(ethyleneglycol)-ionic liquid matrices for liquid-phase organic synthesis
Fraga-Dubreuil, Joan,Famelart, Marie-Helene,Bazureau, Jean Pierre
, p. 374 - 378 (2002)
New, hydrophilic poly(ethyleneglycol)-ionic liquids have been synthesized and investigated, based on 1,3-disubstituted imidazolium cations and fluorinated anions (BF4-, PF6-, (CF3SO2)2N-, or NTf2-). A series of typical solvent-free reactions have been safely realized using a focused microwave reactor for the preparation of imidazolium chloride precursors in yields ranging from 73 to 94% followed by quantitative anion metathesis exchanges. The poly(ethyleneglycol)-ionic liquid matrices were also characterized by NMR (1H, 13C), mass spectrometry (MS), and their dynamic viscosity was determined at 25°C. These poly(ethyleneglycol)-ionic liquid phases (PEG-ILPs) as task-specific ionic liquids are promising tools for synthetic applications in liquid-phase combinatorial chemistry.
Highly efficient synthesis of dimethyl carbonate from methanol and carbon dioxide using IL/DBU/SmOCl as a novel ternary catalytic system
Chaugule, Avinash A.,Bandhal, Harshad A.,Tamboli, Ashif H.,Chung, Wook-Jin,Kim, Hern
, p. 87 - 91 (2016)
Excellent yield of dimethyl carbonate (DMC) was obtained by direct physical or chemical adsorption of carbon dioxide on [EmimOH][NTf2] ionic liquid (IL) in the presence of samarium oxychloride (SmOCl) and 1,8-diazabicyclo[2.2.2]undec-7-ene (DBU) as a super base. The novel ternary catalyst system consisting of [EmimOH][NTf2], DBU, and SmOCl was found to appreciably convert methanol (13.01%) to DMC with excellent selectivity (99.13%). The adsorption of CO2 on IL in the presence of DBU was analyzed by 13C experiment. Moreover, catalytic reactivity of SmOCl and OH-functional group was proved by a predictable mechanism. Various parameters such as reaction temperature, pressure, reaction time, and reusability of catalyst were investigated to maximize DMC yield.
Expanding the polarity range of ionic liquids
Dzyuba, Sergei V.,Bartsch, Richard A.
, p. 4657 - 4659 (2002)
The polarity of several [X-mim]NTf2 ionic liquids, as measured with solvatochromic dyes, Reichardt's dye and Nile Red, may be varied over a wide range by attachment of functional group-containing substituents (X) to the imidazolium cation.
Dissolution of oligo(tetrafluoroethylene) and preparation of poly(tetrafluoroethylene)-based composites by using fluorinated ionic liquids
Tsurumaki, Akiko,Ohno, Hiroyuki
supporting information, p. 409 - 412 (2018/02/27)
Fluorophilic ionic liquids (ILs) showing enhanced compatibility with poly(tetrafluoroethylene) (PTFE) have been newly synthesised. The as-designed ILs contributed both to the dissolution of PTFE oligomers and to the preparation of composites with PTFE with no fear of bleed-out of the ILs.
Induction of lignin solubility for a series of polar ionic liquids by the addition of a small amount of water
Akiba, Takashi,Tsurumaki, Akiko,Ohno, Hiroyuki
supporting information, p. 2260 - 2265 (2017/07/24)
Addition of a small amount of water was found to induce the lignin solubilizing ability in several polar ionic liquids which showed no lignin solubility in the absence of water. Similarly, addition of water was found to enhance lignin solubility in many polar ionic liquids. Though addition of water lowered the proton accepting ability of these ionic liquids, their proton donating ability was found to increase. The lignin dissolution by ionic liquids was newly found to be a function of both the proton accepting ability and proton donating ability of the ionic liquids. Water is a poor solvent for polysaccharides, and water addition has therefore been confirmed to be effective to improve the selective extraction yield of lignin from cedar powder under mild conditions.
Onium salt, acrylic acid copolymer containing onium salt, and antistatic agent containing the same
-
Paragraph 0104, (2017/02/24)
The present invention provides an onium salt, an acrylic acid copolymer containing the onium salt, and an antistatic agent containing the same capable of imparting excellent antistatic properties to a resin. The solution is an onium salt of formula (1), a
First observation for dynamic solvent effect in ionic liquids
Kitaoka, Satoshi,Nobuoka, Kaoru,Miura, Junji,Ohga, Yasushi,Ishikawa, Yuichi
supporting information, p. 385 - 387 (2016/05/09)
We observed pressure effects on the rate of thermal fading of colored chromene 1 photochemically generated from 2 in ionic liquids. The reaction rates were retarded with increasing pressure in [C4-mim][CS], [bzl-mim][Tf2N], and [mnp-mim][Tf2N], whereas the reaction rate increased with pressures in [C4- mim][Tf2N]. These pressure-induced retardations, so-called dynamic solvent effects, result from the slow thermal fluctuations of solvents.
