Publication

Revisiting Ether-Derivatized Imidazolium-Based Ionic Liquids

Paul Joseph Dyson, Rosario Scopelliti, Zhaofu Fei, Wee Han Ang, Dongbin Zhao
2007
Journal Articles

Abstract

A series of ether-derivatized imidazolium halides have been prepd. and characterized. Contrary to literature reports, they are all cryst. solids and have m.ps. well above room temp. (50-100 °C). Single crystals of the imidazolium salts, obtained in situ by slow cooling from their molten state to room temp., were analyzed by X-ray crystallog., revealing various anion-cation interactions in the solid state. Exchange of the halides with [Tf2N]- yielded room temp. ionic liqs. with viscosities that are comparable to related 1-alkyl-3-methylimidazolium ionic liqs. D. functional theory combined with IR spectroscopy has been used to analyze the role of functionalization of the imidazolium side chain on the formation of the mol. and supramol. structure of the compds. and its possible impact on their phys. properties.

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https://infoscience.epfl.ch/entities/publication/e78a31f2-db77-4465-99f5-2587fdf6eba9

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Paul Joseph Dyson, Rosario Scopelliti, Zhaofu Fei, Wee Han Ang, Dongbin Zhao
2007
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/e78a31f2-db77-4465-99f5-2587fdf6eba9

About this result

Related concepts (8)

Imidazole

Imidazole (ImH) is an organic compound with the formula C3N2H4. It is a white or colourless solid that is soluble in water, producing a mildly alkaline solution. In chemistry, it is an aromatic heterocycle, classified as a diazole, and has non-adjacent nitrogen atoms in meta-substitution. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. This ring system is present in important biological building blocks, such as histidine and the related hormone histamine.

Ionic liquid

An ionic liquid (IL) is a salt in the liquid state. In some contexts, the term has been restricted to salts whose melting point is below a specific temperature, such as . While ordinary liquids such as water and gasoline are predominantly made of electrically neutral molecules, ionic liquids are largely made of ions. These substances are variously called liquid electrolytes, ionic melts, ionic fluids, fused salts, liquid salts, or ionic glasses. Ionic liquids have many potential applications.

Quaternary ammonium cation

In chemistry, quaternary ammonium cations, also known as quats, are positively-charged polyatomic ions of the structure , where R is an alkyl group, an aryl group or organyl group. Unlike the ammonium ion () and the primary, secondary, or tertiary ammonium cations, the quaternary ammonium cations are permanently charged, independent of the pH of their solution. Quaternary ammonium salts or quaternary ammonium compounds (called quaternary amines in oilfield parlance) are salts of quaternary ammonium cations.

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