Key factor governing the physicochemical properties and extent of proton transfer in protic ionic liquids: ΔpKa or chemical structure?

2019 ◽  
Vol 21 (1) ◽  
pp. 418-426 ◽  
Author(s):  
Muhammed Shah Miran ◽  
Mahfuzul Hoque ◽  
Tomohiro Yasuda ◽  
Seiji Tsuzuki ◽  
Kazuhide Ueno ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ionic Liquids ◽  
Proton Transfer ◽  
Physicochemical Properties ◽  
Chemical Structure ◽  
Protic Ionic Liquids ◽  
Key Factor ◽  
Factor Governing

A series of protic ionic liquids (PILs) are prepared by neutralisation of bis(trifluoromethanesulfonyl)amide acid (H[NTf2]) with various amines, and the properties (especially thermal stability and ionicity) are compared with those of PILs from 1,8-diazabicyclo[5.4.0]-7-undecene (DBU) and various acids.

Effect of anion chain length on physicochemical properties of N,N-dimethylethanolammonium based protic ionic liquids

2016 ◽  
Vol 415 ◽  
pp. 1-7 ◽  
Author(s):  
Gyanendra Sharma ◽  
Ramesh L. Gardas ◽  
Alberto Coronas ◽  
G. Venkatarathnam
Keyword(s):  
Ionic Liquids ◽  
Physicochemical Properties ◽  
Chain Length ◽  
Protic Ionic Liquids

Hydrogen bonds in protic ionic liquids and their correlation with physicochemical properties

2011 ◽  
Vol 47 (47) ◽  
pp. 12676 ◽  
Author(s):  
Muhammed Shah Miran ◽  
Hiroshi Kinoshita ◽  
Tomohiro Yasuda ◽  
Md. Abu Bin Hasan Susan ◽  
Masayoshi Watanabe
Keyword(s):  
Ionic Liquids ◽  
Hydrogen Bonds ◽  
Physicochemical Properties ◽  
Protic Ionic Liquids

scholarly journals Investigating the effect of ligand and cation on the properties of metal fluorinated acetylacetonate based magnetic ionic liquids

2019 ◽  
Vol 43 (28) ◽  
pp. 11334-11341 ◽  
Author(s):  
Muhammad Qamar Farooq ◽  
Deepak Chand ◽  
Gabriel A. Odugbesi ◽  
Marcelino Varona ◽  
Yaroslav Mudryk ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Magnetic Susceptibility ◽  
Ionic Liquids ◽  
Chemical Structure ◽  
Physiochemical Properties ◽  
Magnetic Ionic Liquids

The effect of chemical structure on various physiochemical properties including thermal stability, solvent miscibility, magnetic susceptibility and viscosity is studied for acetylacetone based magnetic ionic liquids.

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.

Study on the Thermal Stability of Selected Ionic Liquids

2015 ◽  
Vol 220-221 ◽  
pp. 218-223
Author(s):  
Tomasz Jan Kaldonski ◽  
Stanislaw Cudzilo
Keyword(s):  
Higher Education ◽  
Thermal Stability ◽  
Ionic Liquids ◽  
High Temperature ◽  
Thermal Resistance ◽  
Chemical Structure ◽  
Research Project ◽  
High Thermal Resistance ◽  
Thermal Stability Of

Some results of tests of the thermal stability (and volatility) of selected ionic liquids pondered as lubricating substances in comparison with typical lubricating, mineral and synthetic oils, are presented in the article. The research was carried out within the framework of PBR/15–249/2007/WAT–OR00002904 Research Project Financed by the Ministry of Science and Higher Education, during 2007–2011 [1]. The obtained results confirmed high thermal resistance of ionic liquids. It makes it possible to use the liquids as high temperature lubricating substances. At the same time, it has been stated that the thermal resistance of ionic liquids depends on the composition and chemical structure of anion and cation.

Physicochemical properties of imidazo-pyridine protic ionic liquids

2013 ◽  
Vol 1 (38) ◽  
pp. 11570 ◽  
Author(s):  
Shidokht Nazari ◽  
Stanley Cameron ◽  
Michel B. Johnson ◽  
Khashayar Ghandi
Keyword(s):  
Ionic Liquids ◽  
Physicochemical Properties ◽  
Protic Ionic Liquids

scholarly journals Ionic Liquids as High-Performance Lubricants and Lubricant Additives

2021 ◽  
Author(s):  
Hong Guo ◽  
Patricia Iglesias Victoria
Keyword(s):  
Ionic Liquids ◽  
Physicochemical Properties ◽  
High Performance ◽  
Negative Impact ◽  
Molecular Structures ◽  
Lubricant Additives ◽  
Friction Reduction ◽  
Protic Ionic Liquids ◽  
Protection Mechanisms ◽  
Low Toxicity

Taking into account the environmental awareness and ever-growing restrictive regulations over contamination, the study of new lubricants or lubricant additives with high performance and low toxicity over the traditional lubes to reduce the negative impact on the environment is needed. In this chapter, the current literature on the use of ionic liquids, particularly protic ionic liquids, as high-performance lubricants and lubricant additives to different types of base lubricants are reviewed and described. The relation between ionic liquids structures and their physicochemical properties, such as viscosity, thermal stability, corrosion behavior, biodegradability, and toxicity, is elaborated. Friction reduction and wear protection mechanisms of the ionic liquids are discussed with relation to their molecular structures and physicochemical properties.

Alkylimidazolium Protic Ionic Liquids: Structural Features and Physicochemical Properties

ChemPhysChem ◽  
2021 ◽  
Author(s):  
Liudmila E. Shmukler ◽  
Irina V. Fedorova ◽  
Yuliya Fadeeva ◽  
Matvey S. Gruzdev ◽  
Liubov P. Safonova
Keyword(s):  
Ionic Liquids ◽  
Physicochemical Properties ◽  
Structural Features ◽  
Protic Ionic Liquids
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