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Related Concept Videos

Ionic Crystal Structures02:42

Ionic Crystal Structures

19.0K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
19.0K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

20.5K
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...
20.5K
Ionic Association01:28

Ionic Association

19
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.
19
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

51.6K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
51.6K
Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

68.6K
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.
68.6K
Intermolecular Forces03:13

Intermolecular Forces

74.3K
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...
74.3K

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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

Published on: March 24, 2018

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Mesoscopic organization in ionic liquids.

Olga Russina1, Fabrizio Lo Celso2, Natalia Plechkova3

  • 1Dipartimento di Chimica, Università di Roma Sapienza, Rome, Italy.

Topics in Current Chemistry (Cham)
|May 19, 2017
PubMed
Summary
This summary is machine-generated.

Ionic liquids exhibit complex nanoscale structures due to hierarchical organization across space and time. Understanding these ionic liquid (IL) systems requires integrating experimental and computational approaches.

Keywords:
Ionic liquidMesoscopic and microscopic structureMolecular dynamics simulationX-ray and neutron scattering

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Area of Science:

  • Physical Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Ionic liquids (ILs) and their mixtures with molecular liquids display intricate nanoscale correlations.
  • The underlying structural complexity of these systems is not fully understood.

Purpose of the Study:

  • To elucidate the origins of nanoscale correlations in ionic liquids and their mixtures.
  • To highlight the hierarchical nature of structural organization in these systems.

Main Methods:

  • Review and discussion of published experimental results.
  • Presentation of new experimental observations.
  • Application of computational modeling techniques.
  • Integration of data across spatial and temporal scales.

Main Results:

  • The observed nanoscale correlations in ILs and their mixtures arise from a hierarchical construction.
  • This organization spans from ångström to nanometer spatial scales.
  • It also extends from picosecond to hundred-nanosecond temporal scales.

Conclusions:

  • The complex structure of ionic liquids is a result of hierarchical organization.
  • Joint utilization of experimental and computational tools is essential for characterizing these complex systems.