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Related Concept Videos

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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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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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An understanding of the solvating effect helps rationalize the relation between solvation and acidity of the compound. In addition, this also explains the relative stability of conjugate bases for compounds with different pKa values. This lesson details, in-depth, the principle of solvating effects. The strength of an acid and the stability of its corresponding conjugate base are determined using pKa values. This observed relationship is a consequence of solvation, which is the interaction...
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Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy
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Self-consistent continuum solvation (SCCS): the case of charged systems.

C Dupont1, O Andreussi, N Marzari

  • 1Institut Carnot de Bourgogne, UMR 6303 CNRS - Université de Bourgogne, BP 47870, F-21078 Dijon, France.

The Journal of Chemical Physics
|December 11, 2013
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Summary

The self-consistent continuum solvation model (SCCS) accurately predicts the solvation of charged species in water. This computational chemistry method shows high accuracy for both cations and anions.

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Area of Science:

  • Computational Chemistry
  • Physical Chemistry
  • Solution Chemistry

Background:

  • Accurate modeling of ions in aqueous solutions is crucial but challenging due to strong solute-solvent electrostatic interactions.
  • The self-consistent continuum solvation (SCCS) model offers a novel approach to tackle these complexities.

Purpose of the Study:

  • To apply and validate the self-consistent continuum solvation (SCCS) model for describing charged species in aqueous environments.
  • To assess the model's performance and flexibility across a diverse set of 106 monocharged ions.

Main Methods:

  • Utilized the recently developed self-consistent continuum solvation (SCCS) model.
  • Tested the SCCS model on a dataset of 106 monocharged cations and anions in aqueous solutions.

Main Results:

  • Achieved remarkably low mean absolute errors of 2.27 kcal/mol for cations and 5.54 kcal/mol for anions.
  • Demonstrated the SCCS model's flexibility and effectiveness for charged species solvation, comparable to or exceeding state-of-the-art methods.

Conclusions:

  • The SCCS model provides a robust and accurate method for calculating the solvation energies of charged species in water.
  • The study highlights the model's capability in capturing differential behavior between cations and anions.