Journal Article

FZJ-2020-04756

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Molecular anchoring stabilizes low valence Ni( i )TPP on copper against thermally induced chemical changes

Sturmeit, H. M. ; Cojocariu, I.FZJ* ; Jugovac, M. ; Cossaro, A. ; Verdini, A. ; Floreano, L. ; Sala, A. ; Comelli, G. ; Moro, S. ; Stredansky, M. ; Corva, M. ; Vesselli, E. ; Puschnig, P. ; Schneider, C. M.FZJ* ; Feyer, V. (Corresponding author)FZJ* ; Zamborlini, G. ; Cinchetti, M.

2020
RSC [London]

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Please use a persistent id in citations: http://hdl.handle.net/2128/26286  doi:10.1039/D0TC00946F

Abstract: Many applications of molecular layers deposited on metal surfaces, ranging from single-atom catalysis to on-surface magnetochemistry and biosensing, rely on the use of thermal cycles to regenerate the pristine properties of the system. Thus, understanding the microscopic origin behind the thermal stability of organic/metal interfaces is fundamental for engineering reliable organic-based devices. Here, we study nickel porphyrin molecules on a copper surface as an archetypal system containing a metal center whose oxidation state can be controlled through the interaction with the metal substrate. We demonstrate that the strong molecule–surface interaction, followed by charge transfer at the interface, plays a fundamental role in the thermal stability of the layer by rigidly anchoring the porphyrin to the substrate. Upon thermal treatment, the molecules undergo an irreversible transition at 420 K, which is associated with an increase of the charge transfer from the substrate, mostly localized on the phenyl substituents, and a downward tilting of the latters without any chemical modification.

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Contributing Institute(s):

1. Elektronische Eigenschaften (PGI-6)

Research Program(s):

1. 522 - Controlling Spin-Based Phenomena (POF3-522) (POF3-522)

Appears in the scientific report 2020

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Database coverage:
; ; ; Allianz-Lizenz / DFG ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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