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Molecular and Ionic Solids

Molecular and Ionic Solids

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...

Ionic Bonds

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...

Ionic Bonds

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...

Ionic Strength: Effects on Chemical Equilibria

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...

Solubility of Ionic Compounds

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.

Intermolecular Forces

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...

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Related Experiment Video

Updated: Jun 13, 2026

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

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

Published on: March 24, 2018

New frontiers in materials science opened by ionic liquids.

Tsukasa Torimoto¹, Tetsuya Tsuda, Ken-ichi Okazaki

¹Japan Science and Technology Agency, CREST Kawaguchi, Saitama 332-0012, Japan. torimoto@apchem.nagoya-u.ac.jp

Advanced Materials (Deerfield Beach, Fla.)

|May 4, 2010

Summary

This summary is machine-generated.

Ionic liquids (ILs) are versatile, moisture-stable solvents with unique properties. Recent advancements highlight their use as functional materials, production mediums, and components for advanced devices.

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Area of Science:

Materials Science
Chemistry

Background:

Ionic liquids (ILs), molten salts liquid at room temperature, were historically limited by moisture sensitivity.
The development of moisture-stable ILs in 1992 unlocked their unique physicochemical properties.
ILs are composed solely of ions, exhibiting distinctive liquid-like characteristics.

Purpose of the Study:

To review recent studies on ionic liquids as functional advanced materials.
To explore ILs as advanced mediums for materials production.
To examine ILs as components for fabricating highly functional materials.

Main Methods:

Review of recent scientific literature on ionic liquids.
Analysis of IL applications in materials science and synthesis.
Investigation of IL properties for device fabrication.

Main Results:

ILs enable dissolution of insoluble biomaterials and serve as custom lubricants.
Hybridization of ILs creates quasi-solid materials for functional devices.
ILs act as reaction media for nanomaterial synthesis and enable liquid-vacuum technologies.

Conclusions:

Ionic liquids are pivotal in developing advanced functional materials and devices.
Their unique properties facilitate novel applications in synthesis and material production.
ILs are essential for emerging liquid-vacuum technologies and functional material design.