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Related Concept Videos

Solubility of Ionic Compounds02:55

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.
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
Ion Exchange01:17

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...
Ionic Bonds00:42

Ionic Bonds

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 CompoundsIonic bonds are reversible electrostatic interactions between ions with...
Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

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 cation—the calcium...

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Updated: Jun 16, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

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

Published on: March 24, 2018

Accelerating the discovery of biocompatible ionic liquids.

Nicola Wood1, Gill Stephens

  • 1Manchester Interdisciplinary Biocentre, University of Manchester, 131 Princess Street, Manchester, UK M1 7DN.

Physical Chemistry Chemical Physics : PCCP
|February 11, 2010
PubMed
Summary

High throughput screening (HTS) methods are crucial for assessing ionic liquid ecotoxicity. This review critically analyzes HTS approaches, highlighting challenges and potential pitfalls in environmental risk assessment.

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Area of Science:

  • Environmental Science
  • Toxicology
  • Chemical Safety

Background:

  • Ionic liquids (ILs) are novel solvents with diverse applications.
  • Assessing the environmental impact of ILs is essential due to their increasing use.
  • Ecotoxicity screening is a primary step in evaluating IL safety.

Purpose of the Study:

  • To review existing high throughput screening (HTS) methods for ionic liquid ecotoxicity.
  • To critically analyze the challenges and limitations of current HTS approaches.
  • To identify areas for improvement in IL ecotoxicity assessment.

Main Methods:

  • Literature review of published HTS ecotoxicity assays for ILs.
  • Critical analysis of assay methodologies, data interpretation, and reporting.
  • Identification of common problems and pitfalls in IL screening.

Main Results:

  • Several HTS methods are available for IL ecotoxicity testing.
  • Significant challenges exist in standardizing assays and interpreting results.
  • Pitfalls include variability in IL purity, test conditions, and endpoint selection.

Conclusions:

  • Standardization and validation of HTS methods are critical for reliable IL ecotoxicity data.
  • Addressing identified pitfalls will enhance the accuracy of environmental risk assessments.
  • Further research is needed to develop robust and predictive HTS assays for ILs.