Detailed wave function analysis for multireference methods: implementation in the Molcas program package and applications to tetracene
High-level multireference computations on electronically excited and charged states of tetracene are performed, and the results are analyzed using an extensive wave function analysis toolbox that has been newly implemented in the Molcas program package. Aside from verifying the strong effect of dyna...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
October 3, 2017
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| In: |
Journal of chemical theory and computation
Year: 2017, Jahrgang: 13, Heft: 11, Pages: 5343-5353 |
| ISSN: | 1549-9626 |
| DOI: | 10.1021/acs.jctc.7b00718 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1021/acs.jctc.7b00718
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| Verfasserangaben: | Felix Plasser, Stefanie A. Mewes, Andreas Dreuw, and Leticia González |
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| 520 | |a High-level multireference computations on electronically excited and charged states of tetracene are performed, and the results are analyzed using an extensive wave function analysis toolbox that has been newly implemented in the Molcas program package. Aside from verifying the strong effect of dynamic correlation, this study reveals an unexpected critical influence of the atomic orbital basis set. It is shown that different polarized double-ζ basis sets produce significantly different results for energies, densities, and overall wave functions, with the best performance obtained for the atomic natural orbital (ANO) basis set by Pierloot et al. Strikingly, the ANO basis set not only reproduces the energies but also performs exceptionally well in terms of describing the diffuseness of the different states and of their attachment/detachment densities. This study, thus, not only underlines the fact that diffuse basis functions are needed for an accurate description of the electronic wave functions but also shows that, at least for the present example, it is enough to include them implicitly in the contraction scheme. | ||
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