Gauging the performance of some density functionals including dispersion and nonlocal corrections for relative energies of water 20-mers.
Identifieur interne : 000C75 ( PubMed/Curation ); précédent : 000C74; suivant : 000C76Gauging the performance of some density functionals including dispersion and nonlocal corrections for relative energies of water 20-mers.
Auteurs : Mojtaba Alipour [Iran]Source :
- Journal of molecular graphics & modelling [ 1873-4243 ] ; 2017.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Water.
- chemistry : Nanoparticles.
- Models, Molecular, Molecular Conformation, Quantum Theory, Thermodynamics.
Abstract
Currently, development of density functional theory approximations and their benchmarking for accurately modeling different types of molecular interactions become a very active field of research. In this report, performance of the dispersion (D3) and nonlocal (NL) corrected density functionals has been compared with generalized energy-based fragmentation approach at the complete basis set limit for predicting the relative energies of 10 low-energy isomers of water nanoclusters (H2O)20 as an illustrative example of hydrogen bonded systems. Considering a variety of exchange-correlation density functionals in combination with D3 and NL corrections we find that the D3 based approximations outperform the functionals incorporating NL correction. It is also shown that the LC-ωPBE-D3 and rPW86PBE-NL functionals have the best trend from the viewpoint of the order of stabilities in water nanoclusters under study.
DOI: 10.1016/j.jmgm.2017.05.006
PubMed: 28570983
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pubmed:28570983Le document en format XML
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<front><div type="abstract" xml:lang="en">Currently, development of density functional theory approximations and their benchmarking for accurately modeling different types of molecular interactions become a very active field of research. In this report, performance of the dispersion (D3) and nonlocal (NL) corrected density functionals has been compared with generalized energy-based fragmentation approach at the complete basis set limit for predicting the relative energies of 10 low-energy isomers of water nanoclusters (H<sub>2</sub>
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as an illustrative example of hydrogen bonded systems. Considering a variety of exchange-correlation density functionals in combination with D3 and NL corrections we find that the D3 based approximations outperform the functionals incorporating NL correction. It is also shown that the LC-ωPBE-D3 and rPW86PBE-NL functionals have the best trend from the viewpoint of the order of stabilities in water nanoclusters under study.</div>
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