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Modeling Molecules under Pressure with Gaussian Potentials.

Maximilian Scheurer¹, Andreas Dreuw¹, Evgeny Epifanovsky²

¹Interdisciplinary Center for Scientific Computing, Heidelberg University, D-69120 Heidelberg, Germany.

Journal of Chemical Theory and Computation

|December 22, 2020

Summary

This summary is machine-generated.

A new computational method, GOSTSHYP, models molecules under high pressure by compressing electron density. This approach simplifies simulations for various chemical systems and reactions, aiding high-pressure chemistry research.

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Area of Science:

Computational Chemistry
High-Pressure Chemistry
Materials Science

Background:

Computational modeling is crucial for understanding molecules under extreme conditions.
Existing methods for high-pressure chemistry can be complex and require specialized knowledge.

Purpose of the Study:

Introduce a novel electronic structure method, GOSTSHYP, for simulating atoms and molecules under hydrostatic pressure.
Simplify high-pressure computational chemistry for broader accessibility.

Main Methods:

The GOSTSHYP approach distributes Gaussian potentials on the van der Waals surface.
This distribution compresses the electron density and atomic scaffold, simulating pressure effects.
The method requires only pressure as an input parameter.

Main Results:

GOSTSHYP enables straightforward geometry optimizations and ab initio molecular dynamics simulations.
Calculated energies, bond lengths, and dipole moments align with established computational methods.
The method successfully modeled pressure-induced Diels-Alder and acetylene cyclotrimerization reactions.

Conclusions:

GOSTSHYP offers a user-friendly and effective tool for computational high-pressure chemistry.
The method's capabilities extend to modeling pressure-induced chemical transformations.
Potential connections to mechanochemistry are highlighted.