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dc.contributor.authorSpackman, Peter
dc.contributor.authorSpackman, M.A.
dc.contributor.authorGale, Julian
dc.date.accessioned2024-04-09T07:03:58Z
dc.date.available2024-04-09T07:03:58Z
dc.date.issued2023
dc.identifier.citationSpackman, P.R. and Spackman, M.A. and Gale, J.D. 2023. A transferable quantum mechanical energy model for intermolecular interactions using a single empirical parameter. IUCrJ. 10 (PART 6): pp. 754-765.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/94788
dc.identifier.doi10.1107/S2052252523008941
dc.description.abstract

The calculation of intermolecular interactions in molecular crystals using model energies provides a unified route to understanding the complex interplay of driving forces in crystallization, elastic properties and more. Presented here is a new single-parameter interaction energy model (CE-1p), extending the previous CrystalExplorer energy model and calibrated using density functional theory (DFT) calculations at the !B97M-V/def2-QZVP level over 1157 intermolecular interactions from 147 crystal structures. The new model incorporates an improved treatment of dispersion interactions and polarizabilities using the exchange-hole dipole model (XDM), along with the use of effective core potentials (ECPs), facilitating application to molecules containing elements across the periodic table (from H to Rn). This new model is validated against high-level reference data with outstanding performance, comparable to state-of-the-art DFT methods for molecular crystal lattice energies over the X23 set (mean absolute deviation 3.6 kJ mol–1) and for intermolecular interactions in the S66x8 benchmark set (root mean-square deviation 3.3 kJ mol–1). The performance of this model is further examined compared to the GFN2-xTB tight-binding model, providing recommendations for the evaluation of intermolecular interactions in molecular crystal systems.

dc.languageeng
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/FL180100087
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectcomputational modelling
dc.subjectintermolecular interactions
dc.subjectlattice energy
dc.subjectmolecular crystals
dc.titleA transferable quantum mechanical energy model for intermolecular interactions using a single empirical parameter
dc.typeJournal Article
dcterms.source.volume10
dcterms.source.numberPART 6
dcterms.source.startPage754
dcterms.source.endPage765
dcterms.source.issn2052-2525
dcterms.source.titleIUCrJ
dc.date.updated2024-04-09T07:03:54Z
curtin.departmentSchool of Molecular and Life Sciences (MLS)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidSpackman, Peter [0000-0002-6532-8571]
curtin.contributor.orcidGale, Julian [0000-0001-9587-9457]
dcterms.source.eissn2052-2525
curtin.contributor.scopusauthoridSpackman, Peter [56658699700]
curtin.contributor.scopusauthoridGale, Julian [7101993408]
curtin.repositoryagreementV3


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