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Related Concept Videos

Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

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Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
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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...
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Ionic Crystal Structures02:42

Ionic Crystal Structures

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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Hydration of Cement01:24

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Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
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Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

39.8K
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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Ionic Compounds: Formulas and Nomenclature03:34

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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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Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
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Deep Potential for Interaction between Hydrated Cs+ and Graphene.

Yangjun Qin1,2, Liuhua Mu3, Xiao Wan4

  • 1School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

Langmuir : the ACS Journal of Surfaces and Colloids
|April 29, 2025
PubMed
Summary
This summary is machine-generated.

A new deep neural network model accurately predicts interactions between hydrated cesium ions (Cs+) and graphene. This research enhances understanding of graphene membrane adsorption for applications like radionuclide removal.

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Area of Science:

  • Materials Science
  • Computational Chemistry
  • Physical Chemistry

Background:

  • Hydrated cation-π interactions significantly impact graphene-based membrane performance.
  • Limited understanding of cesium ion (Cs+) interactions with graphene hinders adsorption studies.

Purpose of the Study:

  • To develop a deep neural network potential model for predicting Cs+-graphene interactions.
  • To investigate the adsorption behavior of hydrated Cs+ on graphene surfaces.

Main Methods:

  • Developed a deep neural network potential function with DFT-level accuracy.
  • Utilized the deep potential to simulate graphene surface solution properties.
  • Calculated adsorption energy and charge for varying water molecule counts.

Main Results:

  • The deep potential accurately predicts Cs+-graphene interactions.
  • Water molecules were found to weaken the interaction between Cs+ and graphene.
  • Simulations revealed insights into water density distribution and ion dynamics.

Conclusions:

  • The developed deep potential is a powerful tool for studying hydrated cation adsorption on graphene.
  • This approach offers novel solutions for radionuclide management using graphene membranes.