171058-17-6Relevant articles and documents
Dynamic viscosities of a series of 1-alkyl-3-methylimidazolium chloride ionic liquids and their binary mixtures with water at several temperatures
Gomez, Elena,Gonzalez, Begona,Dominguez, Angeles,Tojo, Emilia,Tojo, Jose
, p. 696 - 701 (2006)
Dynamic viscosities, densities, and refractive indices have been measured from T = 298.15 K to T = 343.15 K for 1-hexyl-3-methylimidazolium chloride, [C6mim][Cl], and 1-methyl-3-octylimidazolium chloride, [C 8mim]-[Cl]. Dynamic viscosities and densities have been determined over the whole composition range for water + [C6mim][Cl] and water + [C8mim][Cl] at T = (298.15, 313.15, 328.15, and 343.15) K and 0.1 MPa of pressure. Excess molar volumes and viscosity deviations for the binary systems at the above-mentioned temperatures were fitted to a Redlich-Kister equation to determine the fitting parameters and the root mean square deviations. Densities and viscosities of water + 1-butyl-3-methylimidazolium chloride, [C4mim][Cl], at T= (298.15, 313.15, 328.15, and 343.15) K and 0.1 MPa of pressure have been measured, and apparent molar volumes were determined.
Adsorption of arsenic from aqueous solution using a zero-valent iron material modified by the ionic liquid [Hmim]SbF6
Wu, Fenghui,Zhao, Chenyang,Qu, Guangfei,Yan, Zhoupeng,Zeng, Yingda,Chen, Bangjin,Hu, Yinghui,Ji, Wei,Li, Yingli,Tang, Huimin
, p. 6577 - 6585 (2021)
The environmental and health impacts caused by arsenic (As) in wastewater make it necessary to carefully manage As wastes. In the present work, a composite of the ionic liquid [Hmim]SbF6and nano-iron (H/Fe) was used as an adsorbent to remove As(v) from aqueous solution. To better understand the removal effect of H/Fe on As(v) in aqueous solution, the reaction parameters of pH, reaction temperature, time and H/Fe dosage were systematically analyzed in detail. The results show that H/Fe has significant removal efficiency toward As(v), and that the adsorption of As(v) by 0.5 g H/Fe reaches its maximum adsorption capacity within 2 h. The adsorption of As(v) on H/Fe is a non-linear, time-varying process. The initial adsorption reaction is fast; however, unlike at the beginning, the later reaction involves sustained slow absorption, resulting in a distinct two-phase adsorption characteristic. Redox reaction may be one of the mechanisms responsible for the slow adsorption of As(v) on H/Fe. At the same time, the As(v) removal effect of H/Fe is greatly restricted by the pH. Electrostatic adsorption, adsorption co-precipitation and redox reactions act together on H/Fe in the As(v) removal process. This study provides a basis for further clarifying the adsorption, adsorption rules and mechanism of As(v) on H/Fe and a feasible method for the improvement of As(v) removal efficiency of zero-valent iron materials.
Solution enthalpies of ionic liquid 1-hexyl-3-methylimidazolium chloride
Fang, Da-Wei,Sun, Ying-Chun,Wang, Zhen-Wei
, p. 259 - 261 (2008)
The molar enthalpies of solution of ionic liquid (IL) [C 6mim][Cl] (1-hexyl-3-methylimidazolium chloride) at various molalities in water were measured by a solution-reaction isoperibol calorimeter at 298.15 K. According to Pitzer's electrolyte solution theory, the molar standard enthalpy of solution of [C6mim][Cl], Δ solHm0 and Pitzer's parameters, βMX(0)L, β;MX(1)L, and CMXφL, were obtained. In terms of the experimental data in literature, the mean contribution per methylene (-CH2-) group to the standard molar enthalpies of solution of [Cxmim][Cl] is discussed.
Properties and catalytic activity of magnetic and acidic ionic liquids: Experimental and molecular simulation
Zhou, Cunshan,Yu, Xiaojie,Ma, Haile,Huang, Xingyi,Zhang, Henan,Jin, Jian
, p. 300 - 307 (2014)
The exploitation of dual functional magnetic and acidic ionic liquids (MAILs) for hydrolysis of cellulose to platform chemicals can solve some practical challenges through easy separation of products and efficient catalyst recyclability. In this work, seven Cnmim/FeCl4 MAILs were synthesized and investigated with combined experimental and molecular dynamics. The MAILs contained FeCl4- anions and exhibited a typical hard magnetic materials behavior with rather strong magnetic susceptibilities. These MAILs were stable up to 250-310 C, the decomposition was started up at 250/310-480-810 C in two steps with the formation of the undecomposed residue. The Gibbs energy for the reaction of glucose/xylose conversion to 5-hydroxymethylfurfural by metal chlorides in the CnmimCl ionic liquid was studied using the density functional theory calculations and the results that C3mim/WCl3 may be the most hopeful catalyst. The MAILs have the potential to open up promising new catalytic systems because of their easy product separation and efficient catalyst recyclability.
Phase diagram data for several salt + salt aqueous biphasic systems at 298.15 K
Deng, Yuefeng,Chen, Ji,Zhang, Dongli
, p. 1332 - 1335 (2007)
Phase diagrams corresponding to aqueous biphasic systems of salt (the organic ionic liquid of salts [C4min]Cl, [C6mim]Cl, and [C8mim]Cl) + salt (K3PO4, K2CO 3) + water were deter
Infrared spectroscopic study of absorption and separation of CO using copper(i)-containing ionic liquids
Repper, Stephen E.,Haynes, Anthony,Ditzel, Evert J.,Sunley, Glenn J.
, p. 2821 - 2828 (2017)
Absorption of carbon monoxide by copper(i)-containing ionic liquids, [Cnmim][CuX2] (Cnmim = 1-alkyl-3-methylimidazolium, n = 2, 4, 6, X = Cl, Br, I) has been investigated using in situ high pressure infrared spectroscopy. For each liquid, observation of a ν(CO) band in the region 2075-2090 cm-1 indicates the formation of copper(i) monocarbonyl complexes, assigned as [Cu(CO)X2]-. The rate of growth and equilibrium intensity of the ν(CO) absorption is dependent on applied CO pressure. Binding of CO is reversible such that complete desorption occurs rapidly on heating above 100 °C and the liquids are robust over multiple gas absorption/desorption cycles. For the series of [C6mim][CuX2] salts the CO absorption ability follows the order Cl ≥ Br> I. Selective absorption of CO from CO/H2 and CO/N2 gas mixtures is demonstrated by measuring the changes in headspace CO content upon absorption and desorption of gas. For [C6mim][CuCl2], a single absorb-vent-desorb cycle yields product gas containing ～95% CO starting from a 1:1 CO/N2 mixture, increasing to ～98% CO starting from a 4:1 CO/N2 mixture. This is particularly promising in view of the similar boiling points of CO and N2 that hinders their separation by cryogenic distillation.
Liquid-liquid interfacial tension of equilibrated mixtures of ionic liquids and hydrocarbons
Rodriguez, Hector,Arce, Alberto,Soto, Ana
, p. 1519 - 1524 (2012)
Ionic liquids are possible alternative solvents for the separation of aromatic and aliphatic hydrocarbons by liquid-liquid extraction. Interfacial tension is an important property to consider in the design of liquid-liquid extraction processes. In this work, the liquid-liquid interfacial tension and the mutual solubility at 25 °C have been measured for a series of biphasic, equilibrated mixtures of an ionic liquid and a hydrocarbon. In particular, the ionic liquids 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl) imide (with the alkyl substituent being ethyl, hexyl or decyl), 1-ethyl-3- methylimidazolium ethylsulfate, and 1-ethyl-3-methylimidazolium methanesulfonate have been selected, as well as the hydrocarbons benzene, hexane, ethylbenzene, and octane. The selected sets of ionic liquids and hydrocarbons allow the analysis of the influence of a series of effects on the interfacial tension. For example, the interfacial tension decreases with an increase in the length of the alkyl substituent chain of the cation or with an increase of the degree of charge delocalisation in the anion of the ionic liquid. Also, the interfacial tension with the aromatic hydrocarbons is markedly lower than that with the aliphatic hydrocarbons. A smaller effect is caused by variation of the size of the hydrocarbon. Some of the observed trends can be explained from the mutual solubility of the hydrocarbon and the ionic liquid. Science China Press and Springer-Verlag Berlin Heidelberg 2012.
Enhanced antimicrobial activities of 1-alkyl-3-methyl imidazolium ionic liquids based on silver or copper containing anions
Gilmore, Brendan F.,Andrews, Gavin P.,Borberly, Gabor,Earle, Martyn J.,Gilea, Manuela A.,Gorman, Sean P.,Lowry, Andrew F.,McLaughlin, Martin,Seddon, Kenneth R.
, p. 873 - 876 (2013)
We have developed a series of 1-alkyl-3-methylimidazolium tetrachlorocuprate(ii) and dibromoargentate(i) ionic liquids with enhanced antimicrobial activity when compared with 1-alkyl-3-methylimidazolium chloride ionic liquids. These new ionic liquids proved to be effective against a range of pathogenic bacteria and fungi.
Crystalline and liquid crystalline organic-inorganic hybrid salts with cation-sensitized hexanuclear molybdenum cluster complex anion luminescence
Baecker, Joanna,Mihm, Svenja,Mallick, Bert,Yang, Mei,Meyer, Gerd,Mudring, Anja-Verena
, p. 4089 - 4095 (2011)
The salts [Cnmim]2[Mo6Cl14] (mim = methylimidazolium; n = 4, 6, 12, 16, 18) have been obtained by reaction of CnmimCl with MoCl2. Thermal analysis shows the melting point decreases with increasing alkyl chain length of the cation. The imidazolium chloromolybdates(II) with n = 6-18 decompose above 340 °C; [C18mim]2[Mo6Cl14] is thermally stable up to 390 °C. All compounds are insensititve to the constituents of the atmosphere. Of the higher melting salts [Cnmim] 2[Mo6Cl14] (n = 4, 6), high-quality single crystals could be obtained. Single-crystal X-ray structural analyses clearly show that the cluster complex anion [Mo6Cl14]2- has an electron-precise octahedral {Mo6} cluster. For [C 4mim]2[Mo6Cl14], two polymorphs differing in the cation alkyl-side-chain conformation were obtained. The less thermodynamically stable modification with a gauche conformation undergoes monotropic phase transition to the more stable form with the all-trans conformation. Long alkyl-side-chain salts, [Cnmim] 2[Mo6Cl14] with n = 16 and 18, exhibit thermotropic liquid-crystalline behaviour. All compounds show bright red luminescence centred at about 730 nm with a lifetime of about 0.15 ms, originating from the cluster complex anion, which can be sensitized by the imidazolium cations.
Densities, excess molar and partial molar volumes for water + 1-butyl- or, 1-hexyl- or, 1-octyl-3-methylimidazolium halide room temperature ionic liquids at T = (298.15 and 308.15) K
Sastry, Nandhibatla V.,Vaghela, Nilesh M.,Macwan, Pradip M.
, p. 12 - 18 (2013)
Experimental densities for seven mixtures of water + 1-butyl-3- methylimidazolium iodide, [C4mim][I], + 1-hexyl-3-methylimidazolium chloride, [C6mim][Cl], + 1-hexyl-3-methylimidazolium bromide, [C 6mim][Br], + 1-hexyl-3-me
Lonization state and ion migration mechanism of room temperature molten dialkylimidazolium fluorohydrogenates
Saito, Yuria,Hirai, Kenichi,Matsumoto, Kazuhiko,Hagiwara, Rika,Minamizaki, Yoshihiro
, p. 2942 - 2948 (2005)
The ionization state of room temperature molten salts, alkylimidazolium fluorohydrogenates (RMIm-(HF)2.3F: R = alkyl group, M =methyl group), was evaluated from the observed diffusion coefficient and viscosity, using the Stokes-Einstein relation. Assuming that the dissociation degree of the salt is acceptable for representation of the ionic state of the molten salts, the larger the cation size with elongation of the alkyl chain was, the higher the dissociation degree of the salt Further, we proposed that an idea of the "degree of ordering of cations and anions" was more suitable to represent the ionization state without solvent species. On the basis of this idea, the smaller the cation size of RMIm(HF)2.3F salt was, the higher the ordering of the ion, indicating formation of domain particles of aggregated ions as a unit of mobile species such as A(AX)m + and X(AX)n- for A+X- salt. It was found that highly ordered particles, with large numbers for m and n, showed a high diffusion coefficient. ? 2005 American Chemical Society.
Thermodynamic evaluation of imidazolium based ionic liquids with thiocyanate anion as effective solvent to thiophene extraction
Shekaari, Hemayat,Zafarani-Moattar, Mohammed Taghi,Niknam, Mehrdad
, p. 975 - 984 (2016)
In order to have deep insight on the molecular interactions between thiophene (TS) and ionic liquids, the density, speed of sound and refractive index of binary liquid mixture of TS with 1-hexyl-3-methylimidazolium thiocyanate [HMIM][SCN], and 1-octyl-3-m
Transition-metal- and phosphorus-free electrophilic trifluoromethylthiolation of indoles with sodium trifluoromethanesulfinates in ionic liquids
Wang, Fei,Lu, Guo-Ping,Lin, Yamei
supporting information, (2021/04/12)
An acid-promoted protocol has been developed to achieve the transition-metal- and phosphorus-free electrophilic trifluoromethylthiolation of indoles using sodium trifluoromethanesulfinates in an imidazolium-based ionic liquid ([Hmim]Br). [Hmim]Br not only acts as a recyclable solvent, but also as the reductant in this transformation. The advantages of this chemistry include simple operation, use of a recyclable solvent, avoidance of transition-metal and phosphorus, and gram-scale synthesis.
The one-pot synthesis of butyl-1H-indol-3-alkylcarboxylic acid derivatives in ionic liquid as potent dual-acting agent for management of BPH
Chen, Kaixuan,Jiang, Zhenzhou,Liu, Shuwen,Xi, Baomin,Yang, Fubiao,Zeng, Li-Yan,Zeng, Yunong
, (2020/09/18)
Based on the SAR of both α1-AR antagonists and 5α-reductase (5AR) inhibitors, the dual-acting agent 4-(1-(4-(4-(2-methoxyphenyl)piperazin-1-yl)butyl)-1H-indol-3-yl)butanoic acid 4aaa was designed against BPH and synthesized by two steps of N-alkylation. One-pot protocol towards 4aaa was newly developed. With IL [C6min]Br as solvent, the yield of 4aaa was increased to 75.1% from 16.0% and the reaction time was shortened in 1.5 h from 48 h. 25 derivatives structurally based on arylpiperazine and indolyl butyric acid with alkyl linker were prepared. The protocol was futher extended to get another 14 derivatives wherein O-alkylation was involved, and applied to the synthesis of biologically efficient molecules DPQ and Aripiprazole. Expectedly, compound 4aaa exhibited dual inhibition of α1-AR and 5α-reductase, and exhibited no obvious cytotoxicity against human cells. The pharmacokinetic properties of 4aaa was also determined.
