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Related Concept Videos

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 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.
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...
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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...
Molecular and Ionic Solids02:54

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...

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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

Ionic liquid pillar[5]arene: its ionic conductivity and solvent-free complexation with a guest.

Tomoki Ogoshi1, Naosuke Ueshima, Tada-aki Yamagishi

  • 1Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan. ogoshi@t.kanazawa-u.ac.jp

Chemical Communications (Cambridge, England)
|March 2, 2012
PubMed
Summary

A novel room-temperature ionic liquid featuring pillar[5]arene was synthesized. This material exhibits high thermal stability and effective solvent-free complexation capabilities.

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Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators
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Area of Science:

  • Supramolecular Chemistry
  • Materials Science

Background:

  • Ionic liquids offer unique properties for various applications.
  • Macrocyclic compounds like pillararenes present opportunities for advanced material design.

Purpose of the Study:

  • To synthesize a novel room-temperature ionic liquid incorporating a pillar[5]arene core.
  • To investigate the thermal stability, ionic conductivity, and complexation abilities of the synthesized ionic liquid.

Main Methods:

  • Synthesis of a pillar[5]arene-based ionic liquid.
  • Thermal stability analysis (e.g., TGA).
  • Ionic conductivity measurements.
  • Complexation studies with tetracyanoethylene.

Main Results:

  • Successful synthesis of a room-temperature ionic liquid with a pillar[5]arene core.
  • The ionic liquid demonstrated high thermal stability.
  • Moderate ionic conductivity was observed.
  • Effective solvent-free complexation with tetracyanoethylene was achieved.

Conclusions:

  • The synthesized pillar[5]arene-based ionic liquid is a thermally stable material.
  • It possesses moderate ionic conductivity and valuable solvent-free complexation properties.
  • This material holds potential for applications in supramolecular chemistry and materials science.