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Perspective

Ionic Liquids Based on the Concept of Melting Point Lowering Due to Ethoxylation

Institute of Physical and Theoretical Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany
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Academic Editor: João Paulo Leal
Molecules 2021, 26(13), 4034; https://doi.org/10.3390/molecules26134034
Received: 22 May 2021 / Revised: 28 June 2021 / Accepted: 29 June 2021 / Published: 1 July 2021
(This article belongs to the Special Issue New Trends in Ionic Liquids Application)
Most of the commonly used Ionic Liquids (ILs) contain bulky organic cations with suitable anions. With our COMPLET (Concept of Melting Point Lowering due to Ethoxylation), we follow a different approach. We use simple, low-toxic, cheap, and commercially available anions of the type Cx(EO)yCH2COO to liquefy presumably any simple metal ion, independently of its charge. In the simplest case, the cation can be sodium or lithium, but synthesis of Ionic Liquids is also possible with cations of higher valences such as transition or rare earth metals. Anions with longer alkyl chains are surface active and form surface active ionic liquids (SAILs), which combine properties of ionic and nonionic surfactants at room temperature. They show significant structuring even in their pure state, i.e., in the absence of water or any other added solvent. This approach offers new application domains that go far beyond the common real or hypothetical use of classical Ionic Liquids. Possible applications include the separation of rare earth metals, the use as interesting media for metal catalysis, or the synthesis of completely new materials (for example, in analogy to metal organic frameworks). View Full-Text
Keywords: ionic liquids; surface active ionic liquids (SAILs); room temperature ionic liquids (RTILs); alkyl ethylene glycol ether carboxylates; rare earth metals; transition metals; colloids; green chemistry ionic liquids; surface active ionic liquids (SAILs); room temperature ionic liquids (RTILs); alkyl ethylene glycol ether carboxylates; rare earth metals; transition metals; colloids; green chemistry
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MDPI and ACS Style

Rothe, M.; Müller, E.; Denk, P.; Kunz, W. Ionic Liquids Based on the Concept of Melting Point Lowering Due to Ethoxylation. Molecules 2021, 26, 4034. https://doi.org/10.3390/molecules26134034

AMA Style

Rothe M, Müller E, Denk P, Kunz W. Ionic Liquids Based on the Concept of Melting Point Lowering Due to Ethoxylation. Molecules. 2021; 26(13):4034. https://doi.org/10.3390/molecules26134034

Chicago/Turabian Style

Rothe, Manuel, Eva Müller, Patrick Denk, and Werner Kunz. 2021. "Ionic Liquids Based on the Concept of Melting Point Lowering Due to Ethoxylation" Molecules 26, no. 13: 4034. https://doi.org/10.3390/molecules26134034

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