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Ion Exchange

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...

Acid Halides to Amides: Aminolysis

Acid Halides to Amides: Aminolysis

Aminolysis is a nucleophilic acyl substitution reaction, where ammonia or amines act as nucleophiles to give the substitution product. Acid halides react with ammonia, primary amines, and secondary amines to yield primary, secondary, and tertiary amides, respectively.
In the first step of the aminolysis mechanism, the amine attacks the carbonyl carbon of the acyl chloride to form a tetrahedral intermediate. In the second step, the carbonyl group is re-formed with the elimination of a chloride...

A Single-Component System

A Single-Component System

In the field of chemistry, the terms "component" and "phase" hold significant importance. A component refers to a chemically distinct substance in a system that has specific properties. It is chemically homogeneous, meaning it has the same properties throughout. For example, in a mixture of salt and water, both salt and water are considered separate components because they have different chemical properties.On the other hand, a phase is a form of matter that has a consistent chemical...

Preparation and Reactions of Sulfides

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.

Solubility of Ionic Compounds

Solubility of Ionic Compounds

Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.

Ionic Association

Ionic Association

The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.

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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

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Published on: March 24, 2018

One-component, switchable ionic liquids derived from siloxylated amines.

Vittoria Blasucci¹, Cerag Dilek, Hillary Huttenhower

¹School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta GA, 30332, USA.

Chemical Communications (Cambridge, England)

|December 17, 2008

Summary

Researchers developed novel one-component, thermally reversible solvents from siloxylated amines. These unique neutral to ionic liquid materials offer new possibilities in solvent applications.

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Published on: December 20, 2016

Area of Science:

Materials Science
Chemistry

Background:

Traditional solvents often lack thermal reversibility or tunable properties.
Development of novel solvent systems is crucial for advanced chemical processes.

Purpose of the Study:

To introduce and characterize a new class of one-component, thermally reversible solvents.
To explore the potential of siloxylated amines as precursors for these novel solvents.

Main Methods:

Synthesis of siloxylated amine precursors.
Characterization of the resulting one-component solvents.
Evaluation of thermal reversibility and neutral-to-ionic liquid behavior.

Main Results:

Successful synthesis of a new class of one-component solvents.
Demonstration of thermally reversible properties.
Observation of tunable neutral to ionic liquid characteristics.

Conclusions:

Siloxylated amines provide a viable route to novel, thermally reversible solvents.
These solvents exhibit adaptable neutral to ionic liquid properties.
The findings open avenues for innovative applications in chemistry and materials science.