Experimental and calculation studies on the relationship between the hygroscopic behavior and lubrication properties of ionic liquids

2020 ◽  
Vol 529 ◽  
pp. 147031 ◽  
Author(s):  
Zhaowen Ba ◽  
Guowei Huang ◽  
Dan Qiao ◽  
Dapeng Feng
Keyword(s):  
Ionic Liquids ◽  
Hygroscopic Behavior ◽  
The Relationship ◽  
Lubrication Properties

scholarly journals Mixed Chlorometallate Ionic Liquids as C4 Alkylation Catalysts: A Quantitative Study of Acceptor Properties

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 498
Author(s):  
Xiaoying Pang ◽  
Ying Liu ◽  
Juanfang Wang
Keyword(s):  
Ionic Liquids ◽  
Lewis Acidity ◽  
Alkylation Reaction ◽  
Triethylamine Hydrochloride ◽  
Metal Chlorides ◽  
Molar Ratios ◽  
Anionic Species ◽  
Triethylphosphine Oxide ◽  
The Relationship ◽  
Acceptor Numbers

The acceptor properties of mixed chlorometallate ionic liquids for isobutane-butene alkylation (C4 alkylation) reaction were studied. These ionic liquids were prepared by mixing metal chlorides with either triethylamine hydrochloride or 1-butyl-3-methylimidazolium chloride in various molar ratios. Using triethylphosphine oxide as a probe, Gutmann Acceptor Numbers (AN) of the catalysts were determined, and the Lewis acidity of mixed chlorometallate ionic liquids was quantitatively measured. Additionally, AN value was developed to determine the relationship between Lewis acidity and catalytic selectivity. The favorite AN value for the C4 alkylation reaction should be around 93.0. The [(C2H5)3NH]Cl–AlCl3−CuCl appears to be more Lewis acidity than that of [(C2H5)3NH]Cl–AlCl3. The correlation of the acceptor numbers to speciation of the mixed chlorometallate ionic liquids has also been investigated. [AlCl4]−, [Al2Cl7]−, and [MAlCl5]− (M = Cu, Ag) are the main anionic species of the mixed chlorometallate ILs. While the presence of [(C2H5)3N·M]+ cation always decreases the acidity of the [(C2H5)3NH]Cl−AlCl3−MCl ionic liquids.

Contrasting Lubrication Properties of Imidazolium-Based Ionic Liquids Affected by the Nature of the Surface Under High Vacuum

2014 ◽  
Vol 55 (2) ◽  
pp. 235-244 ◽  
Author(s):  
Masabumi Masuko ◽  
Takahiro Terawaki ◽  
Kenji Kobayashi ◽  
Saiko Aoki ◽  
Akihito Suzuki ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
High Vacuum ◽  
Lubrication Properties

scholarly journals Probing the relationship of cations-graphene interaction strength with self-organization behaviors of the anions at the interface between graphene and ionic liquids

2019 ◽  
Vol 479 ◽  
pp. 576-581 ◽  
Author(s):  
Guangliang Hu ◽  
Radhika S. Anaredy ◽  
Mohammed Alamri ◽  
Qingfeng Liu ◽  
Gaind P. Pandey ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Interaction Strength ◽  
Self Organization ◽  
Relationship Of ◽  
The Relationship

scholarly journals Evaluating the Toxicity of Ionic Liquids on Shewanella sp. for Designing Sustainable Bioprocesses

2020 ◽  
Vol 7 ◽  
Author(s):  
Hakima Kebaili ◽  
Antonia Pérez de los Ríos ◽  
María José Salar-García ◽  
Víctor Manuel Ortiz-Martínez ◽  
Mostefa Kameche ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Chemical Structure ◽  
Marine Bacterium ◽  
Diffusion Test ◽  
Disk Diffusion Test ◽  
Alkyl Chains ◽  
Key Factor ◽  
Wide Group ◽  
Separation Media ◽  
The Relationship

Ionic liquids (ILs) are widely used as reaction and separation media in many technologies due to their unique and advantageous physicochemical properties. Thus, further studies approaching the study of the toxicity of these materials are required. Moreover, they are utilized in devices in which microorganisms such as Shewanella sp. act as biocatalysts. Thus, in this work, the toxicity of 69 ILs on the marine bacterium Shewanella sp. was tested. Specifically, the ILs analyzed were based on the cations imidazolium, pyridinium, pyrrolidinium, piperidinium, morpholinium, oxazolinium, phosphonium, ammonium, and sulfonium, in combination with different anions. The toxicities of this wide group of ILs on Shewanella sp. were determined using two methods: 1) the agar disk-diffusion test and 2) the growth inhibition test in liquid media. The relationship between toxicity and IL chemical structure was elucidated. A decrease in the hydrophobicity of the alkyl chain length was found to be a key factor to reduce IL toxicity. On the other hand, phosphonium-based ILs containing long alkyl chains were shown to be largely incompatible with Shewanella sp.

scholarly journals The Relationship between the Structure and Properties of Amino Acid Ionic Liquids

Molecules ◽  
2019 ◽  
Vol 24 (18) ◽  
pp. 3252 ◽  
Author(s):  
Paula Ossowicz ◽  
Joanna Klebeko ◽  
Barbara Roman ◽  
Ewa Janus ◽  
Zbigniew Rozwadowski
Keyword(s):  
Amino Acids ◽  
Ionic Liquids ◽  
Amino Acid ◽  
Surface Activity ◽  
Spectroscopic Properties ◽  
Specific Rotation ◽  
Structure And Properties ◽  
Rotation Surface ◽  
Cation Type ◽  
The Relationship

Ionic liquids based on different l-amino acids (glycine, l-valine, l-leucine, l-isoleucine, l-histidine, l-methionine, l-tyrosine, l-tryptophan, l-arginine, and l-threonine) and different cations (tetrabutylammonium (TBA), tributylmethylammonium (tBMA), didecyldimethylammonium (DDA), (2-hydroxyethyl)trimethylammonium (choline) (Chol), alkyl(C12-C14) dimethylbenzylammonium (benzalkonium) (BA), dodecyltrimethylammonium (DDTMA), hexadecyltrimethylammonium (HDTMA), octadecyltrimethylammonium (ODTMA) and 1-ethyl-3-methylimidazolium (EMIM)) have been synthesized and characterized by NMR and FTIR. Viscosity, specific rotation, surface activity, thermal stability (TG), and phase transformations (DSC) have been determined and compared with available data. Furthermore, benzalkonium, didecyldimethylammonium, dodecyltrimethylammonium, hexadecyltrimethylammonium, and octadecyltrimethylammonium amino acid ionic liquids have been shown to exhibit surface activity. The dissolution of cellulose in amino acid ionic liquids (AAILs) composed of various cations was also investigated. Cellulose was only dissolved in EMIM salts of amino acids. In particular, the influence of the cation type on selected physicochemical and spectroscopic properties were discussed. The article is a mini review on amino acid ionic liquids.

scholarly journals Viscosities and Conductivities of [BMIM]Zn(Ac)xCly(x=0,1,2,3; y=3,2,1,0) Ionic Liquids at Different Temperatures

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Hang Xu ◽  
Dandan Zhang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Arrhenius Equation ◽  
Correlation Coefficients ◽  
Conductivity Data ◽  
Different Temperatures ◽  
The Relationship

Viscosity and conductivity data of BMIMZnAcxCly(x=0,1,2,3;  y=3,2,1,0) ionic liquids were detected at temperature ranging from 323.15 to 353.15 K with an interval of 5 K. The conductivities of different ionic liquids at the same temperature followed the trend [BMIM][ZnAcCl2] > [BMIM][ZnAc2Cl] > [BMIM][ZnCl3] > [BMIM][ZnAc3]. The viscosities of different ionic liquid abided by the order [BMIM][ZnCl3] > [BMIM][ZnAcCl2] > [BMIM][ZnAc2Cl] > [BMIM][ZnAc3]. Acetate ion could reduce the viscosity of ionic liquids. The relationship between viscosity/conductivity and temperature obeyed the Arrhenius equation and Vogel-Fulcher-Tammann (VFT) equation very well with above 0.99 correlation coefficients.

Study on the relationship between the interaction energy and the melting point of amino acid cation based ionic liquids

2010 ◽  
Vol 942 (1-3) ◽  
pp. 19-25 ◽  
Author(s):  
Wei Li ◽  
Xinmin Wu ◽  
Chuansong Qi ◽  
Hua Rong ◽  
Liangfa Gong
Keyword(s):  
Ionic Liquids ◽  
Amino Acid ◽  
Melting Point ◽  
Interaction Energy ◽  
Acid Cation ◽  
The Relationship

Ionic Liquids with Anti-Candida and Anticancer Dual Activity as Potential N-Myristoyltransferase Inhibitors

2020 ◽  
Vol 16 (7) ◽  
pp. 1036-1041
Author(s):  
Larysa Metelytsia ◽  
Maria Trush ◽  
Ivan Semenyuta ◽  
Sergiy Rogalsky ◽  
Oleksandr Kobzar ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Chain Length ◽  
Alkyl Chain ◽  
Tumor Cell Line ◽  
Molecular Target ◽  
Alkyl Chain Length ◽  
Anticancer Activities ◽  
Anticancer Properties ◽  
Acting Agent ◽  
The Relationship

Background: Currently, a study on the relationship between candidiasis and cancer has been conducted. Until recent years, the opportunistic fungus C. albicans is mainly associated with cancer processes and is able to stimulate carcinogenesis and metastasis. Methods: A number of ionic liquids as potential anticancer and anti-Candida agents have been investigated based on modern theoretical and experimental data about the relationship between oncopathology and candida infection. Results: The analysis of the received experimental results demonstrates that ionic liquid with alkyl chain length of 6 carbon atoms (C6) has not shown anti-Candida activity. The indicators of its cytotoxicity ІС50 (28,617μМ) and MTC (9,050 μМ) against HEP-2 tumor cell line were also very low. Compounds with alkyl chain length C12 have shown high potential of anti-Candida activity and anticancer properties. Conclusion: Based on the obtained results, сompound 4 (C12C1IM-Cl) is proposed for further study as a potential double-acting agent with high anticancer and anti-Candida activities. N-myristoyltransferase is presented and used for docking as a potential molecular target responsible for the dual anti-Сandidа and anticancer activities of studied ionic liquids.

Multiscale simulations to uncover the relationship between hydrogen bond and viscosity for ammonium-based ionic liquids

2018 ◽  
Vol 269 ◽  
pp. 839-846 ◽  
Author(s):  
Yuan Ma ◽  
Yue Zhang ◽  
Weiyi Zhang ◽  
Panpan Heng ◽  
Li Wang ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Ionic Liquids ◽  
Multiscale Simulations ◽  
The Relationship
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