Sergey K. Chulkov
A fragment method for systematic improvement of anharmonic adsorbate vibrational frequencies: Acetylene on Cu(001)
Chulkov, Sergey K.; Benoit, David M.
Abstract
We suggest a novel method for systematic improvement of anharmonic adsorbate frequencies based on a fragment approach. The calculations are carried out by considering the adsorbed molecule separately and computing an energy correction using high-level ab initio method in addition to a standard calculation of the whole adsorbed system using quantum mechanical techniques with periodic boundary conditions. We demonstrate its reliability for a C 2H2 molecule chemisorbed on a Cu(001) surface. We also show that the accuracy of the presented approach with a suitable description of the periodic surface depends mainly on the accuracy of the high-level ab initio method used to describe the adsorbate molecule. Moreover, our technique potentially allows to predict adsorbate vibrational spectra with spectroscopic accuracy. © 2013 AIP Publishing LLC.
Citation
Chulkov, S. K., & Benoit, D. M. (2013). A fragment method for systematic improvement of anharmonic adsorbate vibrational frequencies: Acetylene on Cu(001). The Journal of chemical physics, 139(21), Article 214704. https://doi.org/10.1063/1.4829461
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 25, 2013 |
Online Publication Date | Dec 4, 2013 |
Publication Date | Dec 7, 2013 |
Deposit Date | Jun 8, 2022 |
Journal | Journal of Chemical Physics |
Print ISSN | 0021-9606 |
Electronic ISSN | 1089-7690 |
Publisher | American Institute of Physics |
Peer Reviewed | Peer Reviewed |
Volume | 139 |
Issue | 21 |
Article Number | 214704 |
DOI | https://doi.org/10.1063/1.4829461 |
Keywords | Physical and Theoretical Chemistry; General Physics and Astronomy |
Public URL | https://hull-repository.worktribe.com/output/502526 |
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