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Related Concept Videos

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...
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
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.
Solubility of Ionic Compounds02:55

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.
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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.
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...

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Updated: Jun 14, 2026

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research
08:03

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

Published on: April 18, 2013

Low-melting ionic solids: versatile materials for ion-sensing devices.

Denis V Chernyshov1, Vladimir M Egorov, Natalia V Shvedene

  • 1Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russia.

ACS Applied Materials & Interfaces
|April 2, 2010
PubMed
Summary
This summary is machine-generated.

Low-melting ionic solids (LMISs) offer a novel approach for detecting ions in water. These materials enable the creation of solid-contact ion-sensitive electrodes with tunable selectivity for various anions.

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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

Area of Science:

  • Electrochemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Ionic liquids (ILs) are versatile materials with unique properties.
  • Low-melting ionic solids (LMISs) are a subset of ILs that are solid at room temperature but melt slightly above.
  • Developing novel sensing materials for ion detection in aqueous solutions is crucial for environmental and biomedical applications.

Purpose of the Study:

  • To investigate the use of low-melting ionic solids (LMISs) as sensing materials for ion detection.
  • To develop a simple method for preparing solid-contact ion-sensitive electrodes using LMISs.
  • To demonstrate the ability to tune the selectivity of these electrodes for specific anions.

Main Methods:

  • Preparation of solid-contact ion-sensitive electrodes by melting and solidifying LMISs.
  • Potentiometric measurements in aqueous solutions to assess ion detection.
  • Incorporation of ionophores into the LMIS matrix to modify selectivity.

Main Results:

  • LMISs exhibited a potentiometric response to various anions in aqueous solutions.
  • The selectivity of the ion-sensitive electrodes could be successfully altered by incorporating different ionophores.
  • A simple and effective procedure for electrode preparation was established.

Conclusions:

  • Low-melting ionic solids are suitable sensing materials for potentiometric detection of anions.
  • The incorporation of ionophores provides a viable strategy for tailoring electrode selectivity.
  • This approach offers a promising route for developing advanced ion-sensing devices.