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Related Concept Videos

Ionic Association01:28

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.
The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
Theory of Strong Electrolytes01:23

Theory of Strong Electrolytes

The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
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...
Induced Electric Dipoles01:28

Induced Electric Dipoles

A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...

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Related Experiment Video

Updated: May 13, 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

Excess dielectron in an ionic liquid as a dynamic bipolaron.

Jinxiang Liu1, Zhiping Wang, Meng Zhang

  • 1School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.

Physical Review Letters
|March 26, 2013
PubMed
Summary

A dielectron in ionic liquids prefers distribution over cations, not cavities. Its triplet state is favored, with electrons moving non-synchronously, forming a dynamic bipolaron.

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The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
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Last Updated: May 13, 2026

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

Published on: March 24, 2018

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
11:04

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
10:03

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Published on: September 30, 2014

Area of Science:

  • Computational chemistry
  • Physical chemistry
  • Materials science

Background:

  • Understanding electron behavior in novel solvents is crucial for chemical applications.
  • Ionic liquids offer unique solvation environments compared to traditional solvents like water or ammonia.

Purpose of the Study:

  • To investigate the structure and dynamics of a dielectron (two electrons) within a pyridinium ionic liquid.
  • To compare dielectron behavior in ionic liquids to that in water and liquid ammonia.

Main Methods:

  • Ab initio molecular dynamics simulations were employed.
  • The study examined both singlet and triplet electronic states of the dielectron.

Main Results:

  • Dielectrons in ionic liquids do not form cavity-bound structures.
  • Preferred distribution occurs over multiple cations, exhibiting both diffuse and localized states.
  • A triplet ground state and a low-lying open-shell singlet excited state were identified.
  • Nonsynchronous electron evolution via a diffuse-localized interconversion mechanism was observed.
  • A dynamic bipolaron with mobility lower than a hydrated electron was characterized.

Conclusions:

  • This study provides the first detailed analysis of dielectron behavior in ionic liquids.
  • The findings reveal unique solvation and dynamic properties of dielectrons in this solvent class.