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Adaptive Resolution Simulation of MARTINI Solvents.

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We developed adaptive resolution simulations for water and butane using MARTINI force field models. This multiscale method accurately captures solvent properties, bridging atomistic and coarse-grained simulations.

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Area of Science:

  • Computational Chemistry
  • Molecular Dynamics
  • Multiscale Modeling

Background:

  • Accurate simulation of solvent behavior is crucial in chemistry.
  • Bridging atomistic and coarse-grained models presents challenges in molecular dynamics.

Purpose of the Study:

  • To present an adaptive resolution simulation method for aqueous and apolar solvents.
  • To demonstrate compatibility with the MARTINI force field.
  • To address challenges in coupling different resolution models.

Main Methods:

  • Adaptive resolution molecular dynamics simulations.
  • Coarse-grained molecular models compatible with MARTINI force field.
  • Bundled water models to circumvent multimolecule mapping issues.
  • Simulations of liquid water and butane at ambient temperature.

Main Results:

  • The multiscale approach successfully reproduced structural and dynamical properties.
  • Adaptive resolution simulations accurately modeled both water and butane.
  • Difficulties with multimolecule mapping were overcome using bundled water models.

Conclusions:

  • The presented adaptive resolution method is general and effective.
  • This approach faithfully reproduces properties compared to fully atomistic simulations.
  • It can be applied to link any atomistic force field with the MARTINI force field.