ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
1/1
2 files

Modeling Molecules Under Pressure with Gaussian Potentials

preprint
submitted on 20.11.2020, 14:22 and posted on 23.11.2020, 05:45 by Maximilian Scheurer, Andreas Dreuw, Evgeny Epifanovsky, Martin Head-Gordon, Tim Stauch

The computational modeling of molecules under high pressure is a growing research area that augments experimental high-pressure chemistry. Here, a new electronic structure method for modeling atoms and molecules under pressure, the Gaussians On Surace Tesserae Simulate HYdrostatic Pressure (GOSTSHYP) approach, is introduced. In this method, a set of Gaussian potentials is distributed evenly on the van der Waals surface of the investigated chemical system, leading to a compression of the electron density and the atomic scaffold. Since no parameters other than the pressure need to be specified, GOSTSHYP allows straightforward geometry optimizations and ab initio Molecular Dynamics simulations of chemical systems under pressure for non-expert users. Calculated energies, bond lengths and dipole moments under pressure fall within the range of established computational methods for high-pressure chemistry. A Diels-Alder reaction and the cyclotrimerization of acetylene showcase the ability of GOSTSHYP to model pressure-induced chemical reactions. The connection to mechanochemistry is pointed out.

Funding

GRK 1986:  Complex Scenarios of Light-Control

Deutsche Forschungsgemeinschaft

Find out more...

DFG STA 1526/1-1

DFG STA 1526/2-1

U.S. Department of Energy DE-AC02-05CH11231

History

Email Address of Submitting Author

tstauch@uni-bremen.de

Institution

University of Bremen

Country

Germany

ORCID For Submitting Author

0000-0001-7599-3578

Declaration of Conflict of Interest

The authors declare no conflict of interest.

Version Notes

Initial submission, not yet peer-reviewed

Exports