Article
Thermodynamics
Jingli Han, Manxing Li, Haobing Wang, Yingying Zhang, Junfeng Tian, Xuzhao Yang
Summary: This work studied the densities and viscosities of binary mixtures of 1-ethyl-2,3-dimethylimidazolium tetrafluoroborate [EDMIM][BF4] with methanol, acetonitrile, and acetone. Volumetric properties were calculated and empirical linear formula, Pitzer model, and Erying dynamic equation were used for correlation analysis. The COSMO-RS model was also adopted to analyze the molecular-level interaction mechanism.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2023)
Article
Chemistry, Physical
Aycan Altun, Osman Nuri Sara
Summary: In this study, the densities and viscosities of binary mixtures of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide, [bmim][NTf2], and ethylene glycol (EG) were experimentally measured. A first-order polynomial and Vogel-FulcherTammann equation were used to estimate the densities and viscosities of the mixtures, respectively. The excess molar volume, viscosity, and Gibbs energy of activation for viscous flow were calculated and fitted to the Redlich-Kister equation. The thermal expansion coefficients and partial and apparent molar volumes of [bmim][NTf2] and EG in their binary mixtures were also investigated.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Lucia Allebrandt da Silva Ries, Henrique Alves de Brito, Fabiano Perin Gasparin, Iduvirges Lourdes Muller
Summary: This study utilized the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate as an efficient and environmentally-friendly electrolyte for the electrodeposition of nanocrystalline cobalt films on a silicon substrate. The electrodeposition of cobalt was found to occur by three-dimensional instantaneous nucleation with diffusion-controlled growth, resulting in high-quality and pure metallic cobalt deposits. Elevated current efficiencies were achieved, indicating the great potential of the ionic liquid for cobalt electrodeposition on silicon substrates.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Yuxin Jiang, Xinyuan Zhang, Xianzhen Xu, Shida Gong, Zonghua Wang, Yu Zhou
Summary: Studies have shown that mixing two or more ionic liquids (IL) to form IL mixtures has become a new research hotspot for designing ILs with desirable properties. However, there have been fewer fundamental studies on the interactions and mixing behaviors of IL mixtures. In this work, two ILs containing the same cation [EMIM]+ were used to prepare IL mixtures, and their mixing behavior was investigated through experimental methods and quantum chemical calculations. The main conclusions are: (1) DMSO forms stronger hydrogen bonds with EMIMTFSI than with EMIMBF4. (2) The addition of EMIMBF4 weakens the hydrogen bonding interactions in the EMIMTFSI-EMIMBF4 system and strengthens the coulombic interactions. (3) With dilution, the C2-H bond experiences the smallest changes, suggesting that it remains the main interaction site. (4) New formation complexes between EMIMBF4 and EMIMTFSI were confirmed through excess infrared spectra.
Article
Chemistry, Physical
T. Srinivasa Krishna, P. V. V. S. Rama Rao, K. Narendra, D. Bala Karuna Kumar, D. Ramachandran
Summary: This work discusses the densities and speeds of sound of binary mixtures of 1- butyl -3-methylimidazolium Tetrafluroborate ionic liquid with Ethyl acetate at different temperatures. Molecular interactions and the effect of temperature on interactions are analyzed through excess properties such as excess molar volumes, excess isentropic compressibility, excess speeds of sound, excess molar isentropic compressibility, and excess isobaric thermal expansion. The experimental results are adequately fitted with the Redlich-Kister polynomial equation.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Thermodynamics
R. Rives, A. Mialdun, V. Yasnou, V. Shevtsova, A. Coronas
Summary: The experimental data on density and refractive index of binary mixtures of water and ionic liquid were studied at different temperatures, revealing a decrease in deviation with temperature. A simple linear mixing rule was found to be as effective as more advanced mixing rules for predicting the refractive index of the mixture.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2021)
Article
Polymer Science
Mariah Zuliana Dzulkipli, Jamilah Karim, Azizan Ahmad, Nurul Akmaliah Dzulkurnain, Mohd Sukor Su'ait, Masahiro Yoshizawa-Fujita, Lee Tian Khoon, Nur Hasyareeda Hassan
Summary: Ionic liquid gel polymer electrolytes (ILGPEs) are currently undergoing a revival as a promising electrolyte for electrochemical devices. The assessment of 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM][BF4] showed improved ionic conductivity and thermal stability, making it suitable for operation in electrochemical devices.
Article
Chemistry, Physical
A. M. Dunaev, V. B. Motalov, L. S. Kudin, Yu. A. Zhabanov, V. V. Aleksandriiskii, Dmitrii Govorov
Summary: The thermodynamic properties of evaporation of 1-butyl-3-methylimidazolium tetrafluoroborate (BMImBF(4)) ionic liquid were investigated using Knudsen effusion mass spectrometry. The results showed that at non-equilibrium Langmuir conditions, the IL evaporates primarily in the form of neutral ion pairs (NIPs), while under equilibrium conditions, decomposition products dominate the vapor. The main decomposition products were found to be substituted imidazole-2-ylidene and hydrofluoric acid. The vaporization enthalpy and formation enthalpy of NIPs were determined, and it was demonstrated that the system is characterized by partial equilibrium.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
H. Ghazipour, A. Gutierrez, M. M. Alavianmehr, S. M. Hosseini, S. Aparicio
Summary: This study investigates binary liquid mixtures of 1-butyl-3-methylimidazolium glutamate acid ([bmim][glu]) with alkanols using an experimental and computational chemistry approach. The results provide insight into the properties and deviations from ideality of these complex liquid mixtures, as well as the effects of intermolecular forces and different types of alkanols. Theoretical studies using quantum chemistry and molecular dynamics simulations reveal nanoscopic characteristics of the fluids, particularly focusing on hydrogen bonding and its impact on molecular arrangements and mixed fluids' properties. This study contributes to the understanding of amino acid-based ionic liquid mixtures and the development of sustainable ionic liquid systems mixed with organic solvents for specific applications.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Electrochemistry
Manish S. Sengar, Sachin Saxena, Soami P. Satsangee, Rajeev Jain
Summary: This paper discusses the synthesis and application of graphene oxide (GO)/1-butyl-3-methylimidazolium tetrafluoroborate [BMIM][BF4] nanocomposite. The nanocomposite exhibits remarkable interfacial properties on the electrode surface, leading to enhanced detection and quantification capabilities for Embramine.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Analytical
Liman Chen, Yunna Li, Xu Shi, Di Wang, Guixiang Wang, Caishan Jiao, Meng Zhang
Summary: The electrochemical behaviors of Ce and Gd in the ionic liquid were investigated, revealing differences in diffusion coefficients and activation energies but consistent rate constants of charge transfer. The deposits were characterized using scanning electron microscopy and energy dispersive X-ray spectroscopy.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Thermodynamics
Naved Azum, Maroof Ali, Sana Fatima, Abdullah M. Asiri
Summary: This study reveals the synergistic behavior and solute-solvent interactions in the IL-EGME binary mixture through spectroscopic investigations. The results indicate the presence of strong hydrogen bonding between IL and EGME molecules, leading to the formation of a new entity.
FLUID PHASE EQUILIBRIA
(2022)
Article
Chemistry, Multidisciplinary
Zhen Li, Zhefeng Fan, Yiwei Lian, Zhen Chen
Summary: The dielectric properties of nonaqueous microemulsions were studied with IL as the polar phase, revealing a dielectric relaxation and two inflection points in the weight fraction dependence of dielectric parameters. The results indicate static percolation near the critical threshold between IL/O and O/IL subregions, with the relaxation mechanism identified as interfacial polarization. Analysis suggests a closer interaction between IL and TX-100 compared to TX-100 and oil in the microemulsion system.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Energy & Fuels
Manita Kuntapa, Kaokanya Sudaprasert, Chakrit Tachaapaikoon
Summary: Ionic liquid (IL) pretreatment is a promising approach for pretreating biomass before converting it into sugars, but it is associated with high costs. The combination of [BMIM]BF4: DMSO pretreatment showed the highest delignification and resulted in a highly porous structure. Additionally, this pretreatment reduced the crystallinity of biomass and resulted in the highest cellulose conversion when followed by enzymatic hydrolysis.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Physical
Yoshihiro Koyama, Seiya Shimono, Hiroaki Kishimura, Takahiro Takekiyo, Yukihiro Yoshimura, Hiroshi Abe, Kiyoto Matsuishi
Summary: The high-pressure crystal polymorph of a fluorinated ionic liquid was determined through X-ray diffraction and Raman spectroscopy, revealing irreversible changes in crystal structure upon compression and decompression. Conformational variance/invariance of the ions in the Raman spectra corresponded to the high-pressure crystal polymorph, indicating a switch in conformational variance at a specific pressure point leading to a change in crystal system. The high-pressure crystal polymorph was shown to be entirely different from the low-temperature crystal polymorph.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
