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Related Concept Videos

Ionic Radii03:10

Ionic Radii

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Ionic radius is the measure used to describe the size of an ion. A cation always has fewer electrons and the same number of protons as the parent atom; it is smaller than the atom from which it is derived. For example, the covalent radius of an aluminum atom (1s22s22p63s23p1) is 118 pm, whereas the ionic radius of an Al3+ (1s22s22p6) is 68 pm. As electrons are removed from the outer valence shell, the remaining core electrons occupying smaller shells experience a greater effective nuclear...
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Ionic Bonds00:42

Ionic Bonds

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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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Chirality02:25

Chirality

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Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
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Ionic Compounds: Formulas and Nomenclature03:34

Ionic Compounds: Formulas and Nomenclature

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An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
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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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Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

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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.
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A biomimetic chiral-driven ionic gate constructed by pillar[6]arene-based host-guest systems.

Yue Sun1, Fan Zhang1, Jiaxin Quan1

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This study introduces a biomimetic ion gate using chiral nanochannels that selectively control ion flow based on glucose enantiomers. The system can be switched on or off by L-glucose or D-glucose, respectively.

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Area of Science:

  • Supramolecular Chemistry
  • Nanotechnology
  • Biomimetic Systems

Background:

  • Glucose-sensitive ion channels play crucial roles in biological processes.
  • Understanding stereoselectivity in biological systems is essential.
  • Artificial systems mimicking biological functions are of great interest.

Purpose of the Study:

  • To develop a biomimetic glucose-enantiomer-driven ion gate.
  • To investigate the chiral recognition capabilities of artificial nanochannels.
  • To explore the potential of host-guest systems in controlling ion transport.

Main Methods:

  • Incorporation of chiral pillar[6]arene host-guest systems into artificial nanochannels.
  • Fabrication of chiral nanochannels for ion transport studies.
  • Investigation of ion gate switching behavior with D-glucose and L-glucose.

Main Results:

  • The chiral nanochannels demonstrated a high chiral-driven ionic gate for glucose enantiomers.
  • The ion gate could be switched "off" by D-glucose and "on" by L-glucose.
  • The nanochannel exhibited good reversibility and differences in switching behavior due to binding strength variations.

Conclusions:

  • Chiral nanochannels offer a promising platform for enantioselective ion gating.
  • The study provides insights into biological processes involving glucose-sensitive ion channels.
  • This research contributes to understanding stereoselectivity in life systems.