TY  - JOUR
AU  - Sturmeit, Henning Maximilian
AU  - Cojocariu, Iulia
AU  - Jugovac, Matteo
AU  - Cossaro, Albano
AU  - Verdini, Alberto
AU  - Floreano, Luca
AU  - Sala, Alessandro
AU  - Comelli, Giovanni
AU  - Moro, Stefania
AU  - Stredansky, Matus
AU  - Corva, Manuel
AU  - Vesselli, Erik
AU  - Puschnig, Peter
AU  - Schneider, Claus Michael
AU  - Feyer, Vitaliy
AU  - Zamborlini, Giovanni
AU  - Cinchetti, Mirko
TI  - Molecular anchoring stabilizes low valence Ni( i )TPP on copper against thermally induced chemical changes
JO  - Journal of materials chemistry / C
VL  - 8
IS  - 26
SN  - 2050-7534
CY  - [London]
PB  - RSC
M1  - FZJ-2020-04756
SP  - 8876 - 8886
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000548739700013
DO  - DOI:10.1039/D0TC00946F
UR  - https://juser.fz-juelich.de/record/888202
ER  -