Diffusion, rotation, and surface chemical bond of individual 2 H-tetraphenylporphyrin molecules on Cu(111)

Journal article
(Original article)


Publication Details

Author(s): Buchner F, Xiao J, Zillner E, Chen M, Röckert M, Ditze S, Stark MW, Steinrück HP, Gottfried M, Marbach H
Journal: Journal of Physical Chemistry C
Publisher: American Chemical Society
Publication year: 2011
Volume: 115
Journal issue: 49
Pages range: 24172-24177
ISSN: 1932-7447
eISSN: 1932-7455


Abstract


We address the dynamic behavior and the surface chemical bond of 2H-tetraphenylporphyrin (2HTPP) on Cu(111) around room temperature by variable-temperature scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) in ultrahigh vacuum. Between 280 and 345 K, the molecules predominantly display unidirectional diffusion along one of the three densely packed substrate 〈110〉 directions, which is attributed to a high site selectivity of the adsorbate-substrate bond. Above 305 K, the diffusion direction is found to change occasionally by ±120°. The activation barriers for the unidirectional diffusion and for rotation of the diffusion direction are determined to 0.71 ± 0.08 and 1.28 ± 0.12 eV, respectively. XPS shows that the iminic nitrogen atoms of 2HTPP interact strongly with the Cu surface. It is postulated that the local bonding situation is similar as in the initial complex (sitting-atop complex), which has previously been observed during the surface-confined in situ metalation of porphyrins. © 2011 American Chemical Society.



FAU Authors / FAU Editors

Chen, Min
Lehrstuhl für Physikalische Chemie II
Ditze, Stefanie Dr.
Lehrstuhl für Physikalische Chemie II
Gottfried, Michael PD Dr.
Naturwissenschaftliche Fakultät
Marbach, Hubertus PD Dr.
Lehrstuhl für Experimentalphysik
Röckert, Michael
Lehrstuhl für Physikalische Chemie II
Stark, Michael Werner
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


Research Fields

D Catalytic Materials
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Buchner, F., Xiao, J., Zillner, E., Chen, M., Röckert, M., Ditze, S.,... Marbach, H. (2011). Diffusion, rotation, and surface chemical bond of individual 2 H-tetraphenylporphyrin molecules on Cu(111). Journal of Physical Chemistry C, 115(49), 24172-24177. https://dx.doi.org/10.1021/jp206675u

MLA:
Buchner, Florian, et al. "Diffusion, rotation, and surface chemical bond of individual 2 H-tetraphenylporphyrin molecules on Cu(111)." Journal of Physical Chemistry C 115.49 (2011): 24172-24177.

BibTeX: 

Last updated on 2019-06-08 at 09:04