Journal ArticleDOI
Comparison of physicochemical properties of new ionic liquids based on imidazolium, quaternary ammonium, and guanidinium cations
Prashant S. Kulkarni,Luís C. Branco,João G. Crespo,M. Cristiana Nunes,Anabela Raymundo,Carlos A. M. Afonso +5 more
TLDR
The features of the solid-liquid phase transition were analyzed, namely the glass transition temperature and the heat capacity jump associated with the transition from the non-equilibrium glass to the metastable supercooled liquid.Abstract:
More than 50 ionic liquids were prepared by using imidazolium, quaternary ammonium, and guanidinium cations and various anions. In these series, different cationic structures such as 1-benzyl-3-methylimidazolium [Bzmim]+, 1,3-dibenzylimidazolium [BzmiBz]+, 1-octyl-3-methylimidazolium [C8mim]+, 1-decyl-3-methylimidazolium [C10mim]+, tricapryl-methylammonium [Aliquat]+, benzyltriethylammonium [BzTEA]+, phenyltrimethylammonium [PhTMA]+, and dimethyldihexylguanidinium [DMG]+ were combined with anions, p-toluenesulfonate [TSA](-), dicyanoamide [DCA]-, saccharine (2-sulfobenzoic acid imide sodium salt) [SAC]-, trifluoroacetate [TFA]-, bis(trifluoromethanesulfonyl)imide [Tf2N]-, trifluoromethanesulfonate [TfO]-, and thiocyanate [SCN]-. Important physical data for these ionic liquids are collated, namely solubility in common solvents, viscosity, density, melting point and water content. Apart from the viscosity, the Newtonian and non-Newtonian behavior of these ionic liquids is also disclosed. Stability of these ionic liquids under thermal, basic, acidic, nucleophilic, and oxidative conditions was also studied. The features of the solid-liquid phase transition were analyzed, namely the glass transition temperature and the heat capacity jump associated with the transition from the non-equilibrium glass to the metastable supercooled liquid. A degradation temperature of each ionic liquid was also determined. Comparisons of the properties of various ionic liquids were made.read more
Citations
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Ionic Liquids-Based Extraction: A Promising Strategy for the Advanced Nuclear Fuel Cycle
TL;DR: Ionic Liquids-Based Extraction: A Promising Strategy for theAdvanced Nuclear Fuel Cycle Xiaoqi Sun, Huimin Luo, and Sheng Dai.
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Comprehensive Investigation on the Thermal Stability of 66 Ionic Liquids by Thermogravimetric Analysis
Yuanyuan Cao,Tiancheng Mu +1 more
TL;DR: In this article, the thermal stability of 66 ionic liquids (ILs) was investigated using the thermogravimetric analysis (TGA) method, and the thermal decomposition kinetics of ILs were analyzed using pseudo-zero-order rate expression and their activation energy was obtained.
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Extraction of organic compounds with room temperature ionic liquids.
Colin F. Poole,Salwa K. Poole +1 more
TL;DR: These studies indicate that the solution properties of ionic liquids are similar to those of polar organic solvents, which is of interest for applications in separation science.
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Deep desulfurization of diesel fuel using ionic liquids: current status and future challenges
TL;DR: In this article, the current status in application of ionic liquids for achieving ultra-low-sulfur diesel (ULSD) is discussed, and the appropriate removal method should be selected according to different systems.
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The Design of Polymeric Ionic Liquids for the Preparation of Functional Materials
TL;DR: The tunability of the chemical composition of ionic liquids (ILs), achieved by pairing various organic cations with numerous anions, allows for fine control of their physicochemical properties and has been widely used for the adjustment of the IL solvent characteristics.
References
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TL;DR: There are indications that switching from a normal organic solvent to an ionic liquid can lead to novel and unusual chemical reactivity, which opens up a wide field for future investigations into this new class of solvents in catalytic applications.
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TL;DR: New, hydrophobic ionic liquids with low melting points (<−30 °C to ambient temperature) have been synthesized and investigated, based on 1,3-dialkyl imidazolium cations and hydrophilic anions and thus water-soluble.
Journal ArticleDOI
Ionic Liquids--Solvents of the Future?
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Journal ArticleDOI
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