Competition between Dehydrogenative Organometallic Bonding and Covalent Coupling of an Unfunctionalized Porphyrin on Cu(111)

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Details zur Publikation

Autorinnen und Autoren: Xiang F, Gemeinhardt A, Schneider MA
Zeitschrift: Acs Nano
Verlag: AMER CHEMICAL SOC
Jahr der Veröffentlichung: 2018
Band: 12
Heftnummer: 2
Seitenbereich: 1203-1210
ISSN: 1936-0851


Abstract

We studied the formation of linked porphyrin oligomers from 5,15-diphenylporphyrin (2H-DPP) by thermal, substrate-assisted organometallic and dehydrogenation coupling on Cu(111) by scanning tunneling microscopy. In the range of 300-620 K, we find three distinct stages, at 300 K, the intact 2H-DPP molecules self-assemble into linear structures held together by van der Waals forces. Increasing the substrate temperature, self-metalation and intramolecular ring-closing reactions result in planar and isolated DPP species on the surface. By C-H cleavage, porphyrin oligomers bonded by organometallic and covalent bonds between the modified DPP are formed. The amount of covalently bonded DPP oligomers increases strongly with annealing time and temperature, and they become the dominant species at 570 K. In contrast, the number of organometallically bonded DPP oligomers increases moderately even up to 620 K, indicating that in this case the organometallic bond is no precursor of the covalent bond.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Gemeinhardt, Anja
Lehrstuhl für Experimentalphysik (Astroteilchenphysik)
Schneider, M. Alexander Prof. Dr.
Professur für Experimentalphysik
Xiang, Feifei
Lehrstuhl für Festkörperphysik


Zitierweisen

APA:
Xiang, F., Gemeinhardt, A., & Schneider, M.A. (2018). Competition between Dehydrogenative Organometallic Bonding and Covalent Coupling of an Unfunctionalized Porphyrin on Cu(111). Acs Nano, 12(2), 1203-1210. https://dx.doi.org/10.1021/acsnano.7b06998

MLA:
Xiang, Feifei, Anja Gemeinhardt, and M. Alexander Schneider. "Competition between Dehydrogenative Organometallic Bonding and Covalent Coupling of an Unfunctionalized Porphyrin on Cu(111)." Acs Nano 12.2 (2018): 1203-1210.

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Zuletzt aktualisiert 2019-11-08 um 07:16