Molecular anchoring stabilizes low valence Ni(I)TPP on copper against thermally induced chemical changes

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