Coverage- and Temperature-Dependent Metalation and Dehydrogenation of Tetraphenylporphyrin on Cu(111)

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Röckert M, Franke M, Tariq Q, Ditze S, Stark M, Uffinger P, Wechsler D, Singh U, Xiao J, Marbach H, Steinrück HP, Lytken O
Zeitschrift: Chemistry - A European Journal
Verlag: Wiley-VCH Verlag
Jahr der Veröffentlichung: 2014
Band: 20
Heftnummer: 29
Seitenbereich: 8948--8953
ISSN: 0947-6539


Abstract


Using temperature-programmed desorption, supported by X-ray photoelectron spectroscopy and scanning tunneling microscopy, a comprehensive overview of the main reactions of 5,10,15,20-tetraphenyl-21H,23H-porphyrin (2HTPP) on Cu(111) as a function of coverage and temperature is obtained. Three reactions were identified: metalation with Cu substrate atoms, stepwise partial dehydrogenation, and finally complete dehydrogenation. At low coverage the reactions are independent of coverage, but at higher coverage metalation becomes faster and partial dehydrogenation slower. This behavior is explained by a weaker interaction between the iminic nitrogen atoms and the Cu(111) surface in the high-coverage checkerboard structure, leading to faster metalation, and the stabilizing effect of T-type interactions in the [Cu(TPP)] islands formed at high coverage after metalation, leading to slower dehydrogenation. Based on the amount of hydrogen released and the appearance in STM, a structure of the partially dehydrogenated molecule is suggested.



FAU-Autoren / FAU-Herausgeber

Ditze, Stefanie Dr.
Lehrstuhl für Physikalische Chemie II
Franke, Matthias
Lehrstuhl für Physikalische Chemie II
Lytken, Ole
Lehrstuhl für Physikalische Chemie II
Marbach, Hubertus PD Dr.
Lehrstuhl für Physikalische Chemie II
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
Tariq, Quratulain
Lehrstuhl für Physikalische Chemie II
Uffinger, Patrick
Lehrstuhl für Physikalische Chemie II
Wechsler, Daniel
Lehrstuhl für Physikalische Chemie II


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Röckert, M., Franke, M., Tariq, Q., Ditze, S., Stark, M., Uffinger, P.,... Lytken, O. (2014). Coverage- and Temperature-Dependent Metalation and Dehydrogenation of Tetraphenylporphyrin on Cu(111). Chemistry - A European Journal, 20(29), 8948--8953. https://dx.doi.org/10.1002/chem.201402420

MLA:
Röckert, Michael, et al. "Coverage- and Temperature-Dependent Metalation and Dehydrogenation of Tetraphenylporphyrin on Cu(111)." Chemistry - A European Journal 20.29 (2014): 8948--8953.

BibTeX: 

Zuletzt aktualisiert 2018-11-08 um 03:11