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Related Concept Videos

Ion Exchange01:17

Ion Exchange

781
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...
781
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

18.9K
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...
18.9K
Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

2.1K
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...
2.1K
Ionic Bonds00:42

Ionic Bonds

124.4K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
124.4K
Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

66.5K
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.
66.5K
Common Ion Effect03:24

Common Ion Effect

43.7K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
43.7K

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Related Experiment Video

Updated: Nov 8, 2025

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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Targeted modifications in ionic liquids - from understanding to design.

Frederik Philippi1, Tom Welton

  • 1Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, London W12 0BZ, UK. t.welton@ic.ac.uk.

Physical Chemistry Chemical Physics : PCCP
|April 20, 2021
PubMed
Summary

Targeted modifications help understand ionic liquids (ILs) by changing their structure. This systematic approach aids in designing new ILs by revealing how constituent ions influence properties.

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Area of Science:

  • Materials Science
  • Physical Chemistry
  • Computational Chemistry

Background:

  • Ionic liquids (ILs) exhibit remarkable versatility due to diverse ion combinations.
  • Understanding the structure-property relationships of ILs is crucial for their application.
  • Current challenges lie in predicting and designing ILs with specific functionalities.

Purpose of the Study:

  • To introduce 'targeted modifications' as a systematic strategy for understanding ILs.
  • To demonstrate how targeted modifications facilitate the design of novel ionic liquids.
  • To bridge the gap between fundamental understanding and practical design of ILs.

Main Methods:

  • Deliberate structural alterations of ionic liquids, encompassing experimental and computational approaches.
  • Isolating specific concepts by modifying only one structural element at a time.
  • Systematic investigation of synergistic and antagonistic interactions between design elements.

Main Results:

  • Targeted modifications provide insights into how constituent ions dictate IL properties.
  • This approach allows for the identification and utilization of specific design elements.
  • The study highlights the complex interplay between different design elements in ILs.

Conclusions:

  • Targeted modifications are a powerful tool for deciphering IL behavior and enabling rational design.
  • Collaboration between experimentalists and theoreticians is essential for advancing IL research.
  • This methodology offers a systematic pathway to transition from understanding ILs to designing them.