35935-34-3Relevant articles and documents
Upon the Structure of Room Temperature Halogenoaluminate Ionic Liquids
Abdul-Sada, Ala'a K.,Greenway, Anthony M.,Hitchcock, Peter B.,Mohammed, Thamer J.,Seddon, Kenneth R.,Zora, Jalal A.
, p. 1753 - 1754 (1986)
The X-ray structure of a monoclinic crystal of 1-methyl-3-ethylimidazolium iodide, I, reveals the presence of discrete hydrogen-bonded ion-pairs I(1-)> = 0.293 nm>: the structural implications of the presence of hydrogen-bonding in ionic liquids based upon X-AlX3 (X = Cl or Br) mixtures are discussed.
Kinetics of the synthesis of 1-alkyl-3-methylimidazolium ionic liquids in dilute and concentrated solutions
Firaha, Dzmitry S.,Paulechka, Yauheni U.
, p. 771 - 779 (2013)
The kinetics of the reactions of 1-methylimidazole with iodoethane, 1-iodobutane, 1-bromobutane, 1-bromohexane, 1-bromooctane resulting in the formation of corresponding 1-alkyl-3-methylimidazolium halide ionic liquids in acetonitrile and cyclopentanone solutions has been studied in a wide range of concentrations and degrees of conversion. The studied reactions were found to follow the SN2 rate law in the dilute solutions. The significant deviations from the simple SN2 rate law observed at higher concentrations of the reactants were assigned to the concentration dependence of activity coefficients for the reactants and the transition states. The experimental data were processed with the conductor-like screening model-segment activity coefficient (COSMO-SAC) model and the Scatchard-Hildebrand equation. The latter was found to provide somewhat better description of the experimental results; however, the former has a wider predictive ability. The Arrhenius activation energies and the activation enthalpies were calculated for the investigated systems. The rate constants at infinite dilution were obtained for a large number of 1-haloalkane + 1-methylimidazole + solvent systems with the use of the COSMO-SAC model. It was demonstrated that the rate constants of the studied reactions in various non-hydrogen-bonding solvents can be estimated from a correlation with the Hildebrand solubility parameter.
Ionic liquids containing plant derived benzoate as anions, exhibiting supramolecular polymeric aggregation: Impact of the aggregation on organic catalysis in aqueous medium
Javed, Muhammad Naveed,Ali Hashmi, Imran,Muhammad, Shoaib,Bari, Ahmed,Ghulam Musharraf, Syed,Junaid Mahmood, Syed,Javed, Saima,Imran Ali, Firdous,Rafique, Faisal,Amjad Ilyas, Muhammad,Ahmed Waseem, Waqas
, (2021/05/10)
Naturally occurring benzoic acid (BA) derived anions have been used to prepare halogen free hydrophilic ionic liquids (ILs 1–4). The supramolecular polymeric aggregation behaviour of these ILs has been studied through high-resolution electron spray ioniza
Eutectic ionic liquids as potential electrolytes in dye-sensitized solar cells: Physicochemical and conductivity studies
Kurnia, Kiki Adi,Mohd Faridz Hilmy, Nurfathiah Izzaty,Yahya, Wan Zaireen Nisa
, (2020/10/06)
Ionic liquids (ILs) have been introduced as the electrolyte in dye-sensitized solar cells (DSSC) to replace organic solvents due to their non-flammability, chemical, and thermal stability, as well as less prone to evaporation and leakage. A series of eutectic ILs mixtures composed of 1-ethyl-3-methylimidazolium iodide, [C2C1im]I, 1-ethylpyridinium iodide [C2py]I, 1-propylpyridinium iodide, [C3py]I and 1-butylpyridinium iodide, [C4py]I was developed. The structures and purity of the compounds were validated by nuclear magnetic resonance and Karl Fischer Titration. Their physicochemical properties, such as viscosities and ionic conductivities were evaluated for their potential use as electrolytes in DSSCs. The melting temperature of pure ionic liquids and the mixtures were determined using differential scanning calorimetry in the temperature range of 123.15 K to 393.15 K. It is found that eutectic mixtures were formed at the molar ratios of {0.75[C2py]I:0.25[C2C1im], {0.25[C2py]I:0.75[C2C1im]I}, {0.50[C2py]I:0.50[C2C1im]I}, {0.25[C2C1im]I:0.75 [C4py]I}, {0.75[C2C1im]I:0.25[C4py]I}, and {0.50[C2C1im]I:0.50[C4py]I} with the latter forming a highly stable liquid with no apparent melting peak in the studied temperature range. To understand the formation of eutectic composition, a correlation between molecular structures and the interaction energies of the cations and anions of ILs was performed using the Conductor-like Screening Model for Real Solvents (COSMO-RS). Dynamic viscosities of the binary mixtures were evaluated in the temperature range of 283.15 K to 353.15 K with 10 K increment. The highest ionic conductivity was exhibited by the eutectic ILs electrolyte {0.50[C2C1im]I:0.50[C4py]I:I2(50 wt%)} at 9.67 mS·cm?1 showing its potential for electrolyte application in DSSC.
Ionic Liquids Catalyzed Friedel–Crafts Alkylation of Substituted Benzenes with CCl4 Toward Trichloromethylarenes
Lyu, Xinyu,Wang, Wencheng,Sun, Yiqun,Zhao, Qian,Qiu, Tao
, p. 665 - 671 (2019/01/04)
Abstract: An ionic liquid catalyzed Friedel–Crafts alkylation reaction of substituted benzenes with CCl4 was developed. The reaction proceeded efficiently under mild conditions, gave corresponding trichloromethylarenes with diversity functional groups in moderate to good yields. The influence of Lewis acidity of ionic liquids on the conversion of the alkylation reaction has been investigated. Notably, the probable mechanism of this reaction has been proposed with the assistance of 27Al NMR spectroscopy. It was noteworthy that the predominance of [Al2Cl7]? species in EmimCl–AlCl3, N = 0.67 could be detected by 27Al NMR spectral analysis, and [AlCl4]? was generated at the beginning of reaction. Additionally, it was found that [AlCl4]? could be transformed into [Al2Cl7]? when the reaction finished. Some control experiments confirmed that the interaction between Lewis acidic species [Al2Cl7]? of the ionic liquid and CCl4 led to the change in speciation of aluminum during the alkylation reactions. Graphical Abstract: [Figure not available: see fulltext.].
