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Related Experiment Video

Updated: Jun 20, 2026

Synthesizing Amino Acids Modified with Reactive Carbonyls in Silico to Assess Structural Effects Using Molecular Dynamics Simulations
05:57

Synthesizing Amino Acids Modified with Reactive Carbonyls in Silico to Assess Structural Effects Using Molecular Dynamics Simulations

Published on: April 26, 2024

Parameterization and validation of solvation corrected atomic radii.

Chun-Shan Zuo1, Olaf Wiest, Yun-Dong Wu

  • 1Laboratory of Chemical Genomics, Shenzhen Graduate School of Peking University, Shenzhen, China.

The Journal of Physical Chemistry. A
|September 2, 2009
PubMed
Summary

Accurate ion radii are crucial for calculating hydration free energies. This study introduces new ionic radii derived from experimental data, significantly improving predictions for metal-ligand complexes and enhancing computational chemistry tools.

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Published on: April 8, 2020

Area of Science:

  • Computational Chemistry
  • Physical Chemistry
  • Materials Science

Background:

  • Accurate ion radii are essential for continuum solvation models.
  • Determining ion radii for aqueous solutions is challenging for implicit solvent models.

Purpose of the Study:

  • To develop a simple method for fitting ion radii in aqueous solution.
  • To derive a new set of ionic radii for use with the Integral Equation Formalism of Polarizable Continuum Model (IEFPCM).

Main Methods:

  • B3LYP calculations with 6-311++g** basis set for select ions (Li, Na, K, Be, Mg, Ca).
  • SDD basis set for other metal ions.
  • Fitting new radii based on experimental ionic hydration free energies.

Main Results:

  • New radii significantly improve reproduction of experimental stability constants for metal-ligand complexes (pyridine, bipyridine, phenanthroline).
  • Achieved a standard deviation (SD) of 3.7 kcal/mol and mean unsigned error (MUE) of 3.1 kcal/mol for binding free energies.
  • Markedly outperforms default UAHF radii (MUE 30.4 kcal/mol, SD 16.9 kcal/mol).

Conclusions:

  • The derived ionic radii enhance the accuracy of continuum solvation models.
  • These improved radii offer better computational tools for studying metal-ligand interactions in materials science and environmental applications (e.g., toxic metal removal).