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  Real-Space Observation of Quantum Tunneling by a Carbon Atom: Flipping Reaction of Formaldehyde on Cu(110)

Lin, C., Durant, E., Persson, M., Rossi, M., & Kumagai, T. (2019). Real-Space Observation of Quantum Tunneling by a Carbon Atom: Flipping Reaction of Formaldehyde on Cu(110). The Journal of Physical Chemistry Letters, 10(3), 645-649. doi:10.1021/acs.jpclett.8b03806.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0002-EE17-9 Version Permalink: https://hdl.handle.net/21.11116/0000-0009-6963-2
Genre: Journal Article

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2019
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 Creators:
Lin, Chenfang1, Author           
Durant, Emile2, Author
Persson, Mats2, Author
Rossi, Mariana3, Author           
Kumagai, Takashi1, 4, Author           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, U.K., ou_persistent22              
3Theory, Fritz Haber Institute, Max Planck Society, ou_634547              
4JST-PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan, ou_persistent22              

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 Abstract: We present a direct observation of carbon-atom tunneling in the flipping reaction of formaldehyde between its two mirror-reflected states on a Cu(110) surface using low-temperature scanning tunneling microscopy (STM). The flipping reaction was monitored in real time, and the reaction rate was found to be temperature independent below 10 K. This indicates that this reaction is governed by quantum mechanical tunneling, albeit involving a substantial motion of the carbon atom (∼1 Å). In addition, deuteration of the formaldehyde molecule resulted in a significant kinetic isotope effect (RCH2O/RCD2O ≈ 10). The adsorption structure, reaction pathway, and tunneling probability were examined by density functional theory calculations, which corroborate the experimental observations.

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Language(s): eng - English
 Dates: 2018-12-202019-01-242019-01-24
 Publication Status: Published online
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jpclett.8b03806
 Degree: -

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Title: The Journal of Physical Chemistry Letters
  Abbreviation : J. Phys. Chem. Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: 5 Volume / Issue: 10 (3) Sequence Number: - Start / End Page: 645 - 649 Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/1948-7185