The use of oriented external electric fields (OEEFs) as a potential tool for catalyzing chemical reactions has gained traction in recent years. Electronic structure calculations using OEEFs are commonly done using methods based on density functional theory (DFT), but until now, the performance of DFT methods for calculating molecules in OEEFs had not been assessed in a more general scope. Looking at the accuracy of molecular geometries, electronic energies, and electric dipole moments compared to accurate coupled-cluster with perturbative triples data, we have investigated a wide variety of density functionals using different basis sets to determine how well the individual functionals perform on various types of chemical bonds. We found that most functionals accurately calculate geometries in OEEFs and that small basis sets are sufficient in many cases. Calculations of electronic energies show a significant error introduced by the OEEF, which the use of a larger basis set helps mitigate. Our findings show that DFT methods can be used for accurate calculations in OEEFs, allowing researchers to make full use of the advantages that they bring.
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28 September 2023
Research Article|
September 26 2023
Investigating the accuracy of density functional methods for molecules in electric fields Available to Purchase
Tarek Scheele
;
Tarek Scheele
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
University of Bremen, Institute for Physical and Theoretical Chemistry
, Leobener Straße NW2, D-28359 Bremen, Germany
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Tim Neudecker
Tim Neudecker
a)
(Conceptualization, Funding acquisition, Methodology, Project administration, Resources, Supervision, Writing – review & editing)
1
University of Bremen, Institute for Physical and Theoretical Chemistry
, Leobener Straße NW2, D-28359 Bremen, Germany
2
Bremen Center for Computational Materials Science, University of Bremen
, Am Fallturm 1, D-28359 Bremen, Germany
3
MAPEX Center for Materials and Processes, University of Bremen
, Bibliothekstraße 1, D-28359 Bremen, Germany
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
Tarek Scheele
1
Tim Neudecker
1,2,3,a)
1
University of Bremen, Institute for Physical and Theoretical Chemistry
, Leobener Straße NW2, D-28359 Bremen, Germany
2
Bremen Center for Computational Materials Science, University of Bremen
, Am Fallturm 1, D-28359 Bremen, Germany
3
MAPEX Center for Materials and Processes, University of Bremen
, Bibliothekstraße 1, D-28359 Bremen, Germany
a)Author to whom correspondence should be addressed: [email protected]
J. Chem. Phys. 159, 124111 (2023)
Article history
Received:
June 22 2023
Accepted:
September 05 2023
Citation
Tarek Scheele, Tim Neudecker; Investigating the accuracy of density functional methods for molecules in electric fields. J. Chem. Phys. 28 September 2023; 159 (12): 124111. https://doi.org/10.1063/5.0164372
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