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Related Concept Videos

Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

66.2K
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.
66.2K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

16.3K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
16.3K
Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

2.9K
The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
2.9K
Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

14.1K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.1K
Ions as Acids and Bases02:54

Ions as Acids and Bases

22.6K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
22.6K
Ionic Association01:28

Ionic Association

205
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.
205

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Thermal Scanning Conductometry TSC as a General Method for Studying and Controlling the Phase Behavior of Conductive Physical Gels
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Thermal Scanning Conductometry TSC as a General Method for Studying and Controlling the Phase Behavior of Conductive Physical Gels

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Dicationic organic salts: gelators for ionic liquids.

Francesca D'Anna1, Carla Rizzo, Paola Vitale

  • 1Dipartimento STEBICEF, Sezione di Chimica, Università degli Studi di Palermo, Viale delle Scienze-Parco d'Orleans II, 90128 Palermo, Italy. francesca.danna@unipa.it renato.noto@unipa.it.

Soft Matter
|October 21, 2014
PubMed
Summary
This summary is machine-generated.

Organic salts effectively gel ionic liquids, creating novel materials. Their thermal stability, conductivity, and responsiveness to stimuli were analyzed, revealing structure-property relationships for diverse applications.

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Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators
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Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators

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Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Organic Chemistry

Background:

  • Ionic liquids offer unique solvent properties but require stabilization for practical applications.
  • Organic gelators are crucial for forming structured soft materials from liquids.
  • Developing new gelators for ionic liquids is essential for advanced material design.

Purpose of the Study:

  • To synthesize and evaluate diimidazolium and dipyrrolidinium organic salts as gelators for organic solvents and ionic liquids.
  • To investigate the thermal stability, electrical conductivity, and optical properties of the resulting gels.
  • To elucidate the gelation mechanism and assess the responsiveness of the formed gels to external stimuli.

Main Methods:

  • Synthesis of novel organic salts with specific cation and anion structures.
  • Gelation tests with various organic solvents and ionic liquids.
  • Characterization using micro-Differential Scanning Calorimetry (micro-DSC), dielectric spectroscopy, UV-vis spectroscopy, and resonance light scattering.
  • Analysis of stimuli-responsive behavior (magnetic stirring, ultrasound).

Main Results:

  • The synthesized organic salts successfully gelled ionic liquids.
  • The resulting gel materials exhibited notable thermal stability and electrical conductivity.
  • Resonance light scattering provided insights into the gelation mechanism and kinetics.
  • The gels demonstrated responsiveness to external stimuli like magnetic stirring and ultrasound.

Conclusions:

  • Diimidazolium and dipyrrolidinium organic salts are effective gelators for ionic liquids.
  • The properties of the gels are tunable based on the interplay between gelator structure and ionic liquid.
  • These findings open avenues for developing new functional materials with tailored applications.