Extraction of Acids and Bases from Aqueous Phase to a Pseudoprotic Ionic Liquid

We report experiments on the extraction of acids and bases from an aqueous phase to a pseudoprotic ionic liquid phase consisting of an equimolar mixture of trihexylamine and octanoic acid. We observed the extraction of a wide range of acids and bases, and investigated the mechanism of extraction in detail. Our results confirmed the observation of the Hofmeister effect in these systems reported in our previous work, where the extent of the extraction of copper salts was significantly influenced by the interactions between extracted inorganic anions and the organic phase. Our results further demonstrated that the organic layer served as a “floating buffer” capable of stabilizing the pH of an acidic or alkaline aqueous phase. The results tie current interest in protic and pseudoprotic ionic liquids to earlier work on the extraction of acids using amine and acid–base couples as extraction agents in an inert organic solvent.

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Relationship between Liquid Nanoscale Structure in Solvents and the Strength of the Hofmeister Effect in Extraction Experiments

Physical Chemistry Chemical Physics ◽

10.1039/d0cp05973k ◽

2021 ◽

Author(s):

Mark N Kobrak ◽

Dmytro Nykypanchuk ◽

Camiel HC Janssen

Keyword(s):

Carboxylic Acids ◽

Aqueous Phase ◽

Liquid Extraction ◽

Copper Salts ◽

Hofmeister Effect ◽

Liquid Liquid Extraction ◽

Nanoscale Structure

In this study, we used mixtures of carboxylic acids and amines as solvents for the liquid-liquid extraction of copper salts with various anions from aqueous phase, and systematically varied the...

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Fabrication of a GUMBOS-based acid–base indicator: smart probe for sensing acids and bases in any solvent

Physical Chemistry Chemical Physics ◽

10.1039/d0cp03157g ◽

2020 ◽

Vol 22 (48) ◽

pp. 28045-28054

Author(s):

Prabal Pramanik ◽

Rajkumar Sahoo ◽

Sudhir Kumar Das ◽

Mintu Halder

Keyword(s):

Ionic Liquid ◽

Dissociation Constants ◽

Ph Responsive ◽

Acid Base ◽

Polar Solvents ◽

Polar Media ◽

Acids And Bases

This report outlines the synthesis of an ionic liquid-based pH-responsive indicator to sense acids or bases in non-polar as well as polar solvents. This has further scope to investigate the dissociation constants of several acids in non-polar media.

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General Trend of Negative Transference Number in Li Salt/Ionic Liquid Mixtures

10.26434/chemrxiv.7728545 ◽

2019 ◽

Cited By ~ 1

Author(s):

Nicola Molinari ◽

Jonathan P. Mailoa ◽

Boris Kozinsky

Keyword(s):

Ionic Liquid ◽

Transference Number ◽

Liquid Mixtures ◽

Single Linkage ◽

Self Diffusion ◽

Wide Range ◽

Single Linkage Cluster ◽

Concentrated Solution ◽

The One ◽

Dynamics Simulations

We show that strong cation-anion interactions in a wide range of lithium-salt/ionic liquid mixtures result in a negative lithium transference number, using molecular dynamics simulations and rigorous concentrated solution theory. This behavior fundamentally deviates from the one obtained using self-diffusion coefficient analysis and agrees well with experimental electrophoretic NMR measurements, which accounts for ion correlations. We extend these findings to several ionic liquid compositions. We investigate the degree of spatial ionic coordination employing single-linkage cluster analysis, unveiling asymmetrical anion-cation clusters. Additionally, we formulate a way to compute the effective lithium charge that corresponds to and agrees well with electrophoretic measurements and show that lithium effectively carries a negative charge in a remarkably wide range of chemistries and concentrations. The generality of our observation has significant implications for the energy storage community, emphasizing the need to reconsider the potential of these systems as next generation battery electrolytes.<br>

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Investigation of Lewis Acid-Base Reaction of Acidic Species Present in Aluminum Chloride-Urea Ionic Liquid [AlCl2.nUrea] +

Journal of Al-Nahrain University-Science ◽

10.22401/jnus.15.1.09 ◽

2012 ◽

Vol 15 (1) ◽

pp. 71-75

Author(s):

Hadi M. A. Abood ◽

◽

Marwa H. Fadhil ◽

Keyword(s):

Ionic Liquid ◽

Lewis Acid ◽

Aluminum Chloride ◽

Acid Base

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Lewis acid / Base-free Strategy for the Synthesis of 2-Arylthio and Selenyl Benzothiazole / Thiazole and Imidazole

Heterocyclic Communications ◽

10.1515/hc-2020-0119 ◽

2021 ◽

Vol 27 (1) ◽

pp. 17-23

Author(s):

Guniganti Balakishan ◽

Gullapalli Kumaraswamy ◽

Vykunthapu Narayanarao ◽

Pagilla Shankaraiah

Keyword(s):

Lewis Acid ◽

Bond Formation ◽

Acid Base ◽

Mechanistic Pathway ◽

Wide Range ◽

Acid And Base ◽

Lewis Acid And Base ◽

Sulfur Bond

Abstract A Cu(II)-catalyzed Csp2-Se and Csp2-Sulfur bond formation was achieved with moderate to good yields without the aid of Lewis acid and base. The reaction is compatible with a wide range of heterocycles such as benzothiazole, thiazole, and imidazole. Also, this typical protocol is found to be active in thio-selenation via S-H activation. Additionally, we proposed a plausible mechanistic pathway involving Cu(III) putative intermediate.

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