1. Introducing the Bipolar Solvent Media Using the Aqueous Mixtures of Amino Acid Anion-Based Ionic Liquids
- Author
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Anil Kumar and Vijay Beniwal
- Subjects
Anions ,Polarity (physics) ,Ionic Liquids ,Protonation ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Chemical reaction ,chemistry.chemical_compound ,Computational chemistry ,Materials Chemistry ,Amino Acids ,Physical and Theoretical Chemistry ,Aqueous solution ,Molecular Structure ,Chemistry ,Solvation ,Water ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Surfaces, Coatings and Films ,Solvent ,Spectrometry, Fluorescence ,Ionic liquid ,Solvents ,Polar ,Spectrophotometry, Ultraviolet ,0210 nano-technology - Abstract
To carry out a chemical reaction between the reactants with largely different polarities, it becomes important to have a reaction medium that possesses both the polar and nonpolar solvation environments. In an attempt to explore the reaction media with such unique polarity properties, the present study provides a thorough understanding of the bipolar solvent media using the aqueous mixtures of amino acid anion-based ionic liquids. The highly polar behavior of the binary mixtures used in the study has been ascribed to the pure ionic liquid state. However, the less polar solvation shells have been attributed to the presence of a neutral form of the anions. Addition of water in the amino acid anion-based ionic liquids causes the protonation of a certain fraction of the anions of the ionic liquids, resulting into the formation of a less polar nonionic protonated form along with the highly polar natural anionic form. This results into the formation of two solvation spheres with different polarities, which can be seen very clearly from the presence of two absorption bands (lower wavelength absorption band and higher wavelength absorption band) in the UV-vis absorption spectrum of Reichardt's E
- Published
- 2017
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