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Related Concept Videos

Ionic Bonds00:42

Ionic Bonds

129.7K
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...
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Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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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. 
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Bond Polarity, Dipole Moment, and Percent Ionic Character02:48

Bond Polarity, Dipole Moment, and Percent Ionic Character

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Bond Polarity
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Bonding in Metals02:32

Bonding in Metals

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Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
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Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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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...
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Peptide Bonds02:43

Peptide Bonds

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A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
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Updated: Jan 27, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Rigid ionic-bonding networks boosting organic room temperature phosphorescence.

Wenpeng Ye1,2, Chao Huang2, Anqi Lv2

  • 1State Key Laboratory of Flexible Electronics (LoFE), Institute of Advanced Materials (IAM), School of Chemistry and Life Sciences, Nanjing University of Posts and Telecommunications, Nanjing, China.

Nature Communications
|January 25, 2026
PubMed
Summary
This summary is machine-generated.

Ionic bonds enable efficient organic phosphorescence by creating networks that restrict guest molecule movement. This strategy allows for diverse colors and long lifetimes in new phosphorescent materials.

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Area of Science:

  • Materials Science
  • Organic Chemistry
  • Photophysics

Background:

  • Host-guest doping is common for room-temperature phosphorescence but requires precise molecular design.
  • Ionic bonds offer advantages for phosphorescence enhancement due to electrostatic interactions.

Purpose of the Study:

  • To develop a facile method for preparing ionic phosphorescent materials.
  • To explore the use of ionic alkyl chain molecules as hosts for diverse guests.

Main Methods:

  • Synthesized ionic phosphorescent materials using ionic alkyl chain hosts and quaternary ammonium-functionalized chromophores.
  • Investigated the effect of ionic-bonding networks on phosphorescence properties.
  • Analyzed the influence of alkyl chain matching on the host-guest system.

Main Results:

  • Achieved diverse phosphorescence colors (blue to orange-red) with long lifetimes (up to 572.27 ms).
  • Demonstrated that ionic-bonding networks effectively restrict guest molecule movement, minimizing non-radiative transitions.
  • Showcased the role of alkyl chain matching in providing a rigid environment and enhancing the heavy-atom effect.

Conclusions:

  • The ionic host-guest strategy provides a simple route to high-performance phosphorescent materials.
  • Ionic-bonding networks are crucial for achieving efficient isolated-molecular phosphorescence.
  • This approach offers a new reference for designing non-conjugated hosts for phosphorescent materials.