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Related Experiment Videos

Restrained point-charge models for disaccharides.

Emma Sigfridsson1, Ulf Ryde, Bruce L Bush

  • 1Department of Theoretical Chemistry, Lund University, Chemical Centre, Sweden.

Journal of Computational Chemistry
|March 23, 2002
PubMed
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New methods CHELP-BOW0 and CHELP-BOWC improve atomic partial charge calculations for molecules like sucrose. CHELP-BOWC is recommended for flexible molecules, enhancing charge transferability across different conformations.

Area of Science:

  • Computational chemistry
  • Molecular modeling

Background:

  • Deriving accurate atomic partial charges is crucial for molecular simulations.
  • Previous methods often yield poorly transferable charge patterns, especially for flexible molecules.

Purpose of the Study:

  • To develop and evaluate new methods for deriving more transferable atomic partial charges.
  • To compare the performance of restrained and conformation-inclusive charge calculation methods.

Main Methods:

  • Testing various atomic partial charge derivation methods on sucrose.
  • Developing CHELP-BOW0 with harmonic restraints on atomic charges.
  • Developing CHELP-BOWC by including multiple conformations in the fitting process.

Main Results:

Related Experiment Videos

  • Unrestrained methods result in poorly transferable charges.
  • CHELP-BOW0 improves chemical and conformational transferability over unrestrained methods.
  • CHELP-BOWC demonstrates superior transferability for flexible molecules compared to CHELP-BOW and CHELP-BOW0.

    • Conclusions:

    • CHELP-BOW is suitable for rigid molecules.
    • CHELP-BOWC is recommended for flexible molecules due to enhanced charge transferability.
    • The choice of method depends on molecular flexibility and transferability requirements.