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.

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.

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.

Application of Magnetic Ionic Liquids

2017 ◽  
Vol 727 ◽  
pp. 98-105 ◽  
Author(s):  
Wei Wei He ◽  
Guang Fei Qu ◽  
Qian Zhao ◽  
Xiao Fen Li
Keyword(s):  
Magnetic Field ◽  
Thermal Stability ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Material Synthesis ◽  
Broad Application ◽  
Magnetic Ionic Liquids ◽  
Good Solubility ◽  
Magnetic Ionic Liquid ◽  
Application Prospects

Magnetic Ionic liquids are a class of functional ionic liquids with magnetic. Because of outstanding thermal stability, excellent electrochemical properties, good solubility and recyclability, it has broad application prospects in catalysis, separation extraction, material synthesis and other fields. The main applications of magnetic ionic liquids in recent years are reviewed especially in the field of magnetic separation and catalytic. It shows a huge advantage that can highly efficiently catalyze myriads of reactions, and can be recovered and reused by a magnetic field. With the further research of magnetic ionic liquids, it is believed that the magnetic ionic liquid will be applied in more fields.

Metal-containing and magnetic ionic liquids in analytical extractions and gas separations

2021 ◽  
Vol 140 ◽  
pp. 116275
Author(s):  
Marcelino Varona ◽  
Philip Eor ◽  
Luiz Carlos Ferreira Neto ◽  
Josias Merib ◽  
Jared L. Anderson
Keyword(s):  
Ionic Liquids ◽  
Gas Separations ◽  
Magnetic Ionic Liquids

Synthesis and properties of phthalonitrile-based resins containing spirocycle acetal

2020 ◽  
pp. 095400832097759
Author(s):  
Ke Li ◽  
Hua Yin ◽  
Kun Yang ◽  
Pei Dai ◽  
Ling Han ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Chemical Structure ◽  
Room Temperature ◽  
Laser Desorption Ionization ◽  
Scanning Calorimetry ◽  
Rheological Analysis ◽  
Ionization Time ◽  
Dynamic Mechanical ◽  
Nmr Spectrometry ◽  
Current Context

Designing novel low-melting, high-rigidity phthalonitrile resin is of great significance in the current context of development. In this study, rigid spirocycle acetal structure was introduced into phthalonitrile to reduce the melting point and maintain their thermal stability. The chemical structure of resins was confirmed by nuclear magnetic resonance (NMR) spectrometry, matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry and Fourier-transform infrared (FTIR) spectroscopy. The curing behaviors were studied by differential scanning calorimetry (DSC). Thermal stability and mechanical properties of the cured resins were investigated by dynamic mechanical thermal analysis (DMTA) and thermogravimetric analysis (TGA). The processability was studied by rheological analysis. The results indicated the three monomers had a low melting temperature, wide processing windows and low viscosities. These polymers did not exhibit Tg from room temperature to 400°C, exhibited superb dynamic mechanical property and thermal stability.

scholarly journals Thermal Stability and Decomposition Kinetics of 1-Alkyl-2,3-Dimethylimidazolium Nitrate Ionic Liquids: TGA and DFT Study

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2560
Author(s):  
Jianwen Meng ◽  
Yong Pan ◽  
Fan Yang ◽  
Yanjun Wang ◽  
Zhongyu Zheng ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Density Functional Theory ◽  
Ionic Liquids ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Nitrogen Atmosphere ◽  
Decomposition Kinetics ◽  
Heating Rates ◽  
Functional Theory ◽  
Kinetics Of

The thermal stability and decomposition kinetics analysis of 1-alkyl-2,3-dimethylimidazole nitrate ionic liquids with different alkyl chains (ethyl, butyl, hexyl, octyl and decyl) were investigated by using isothermal and nonisothermal thermogravimetric analysis combined with thermoanalytical kinetics calculations (Kissinger, Friedman and Flynn-Wall-Ozawa) and density functional theory (DFT) calculations. Isothermal experiments were performed in a nitrogen atmosphere at 240, 250, 260 and 270 °C. In addition, the nonisothermal experiments were carried out in nitrogen and air atmospheres from 30 to 600 °C with heating rates of 5, 10, 15, 20 and 25 °C/min. The results of two heating modes, three activation energy calculations and density functional theory calculations consistently showed that the thermal stability of 1-alkyl-2,3-dimethylimidazolium nitrate ionic liquids decreases with the increasing length of the alkyl chain of the substituent on the cation, and then the thermal hazard increases. This study could provide some guidance for the safety design and use of imidazolium nitrate ionic liquids for engineering.

scholarly journals Study of Preparation and Thermal Stability of Cyano-Functionalized Imidazolium Type Ionic Liquids

2013 ◽  
Vol 25 (8) ◽  
pp. 4779-4782 ◽  
Author(s):  
W.D. Liang ◽  
H.F. Li ◽  
G.J. Gou ◽  
A.Q. Wang
Keyword(s):  
Thermal Stability ◽  
Ionic Liquids ◽  
Thermal Stability Of

scholarly journals Magnetic microemulsions based on magnetic ionic liquids

2012 ◽  
Vol 14 (44) ◽  
pp. 15355 ◽  
Author(s):  
Andreas Klee ◽  
Sylvain Prevost ◽  
Werner Kunz ◽  
Ralf Schweins ◽  
Klaus Kiefer ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Magnetic Ionic Liquids
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