We investigate the early stages of the growth of zinc-phthalocyanine on Al(100) using X-ray photoemission spectroscopy (XPS) and low-energy electron diffraction (LEED). Diffraction patterns show a (5 × 5) reconstruction, characteristic of flat-lying molecules forming a long-range-ordered structure with a square unit cell. The degree of ordering (i.e., the average domain size) is increased when the substrate is kept above 100 °C during the deposition. At low coverage (≤1 ML), a sizeable charge transfer from the substrate to the molecules is observed, indicating a strong interaction at the organic-inorganic interface. As a consequence of charge filling of ZnPc LUMO, a self-demetalation of the molecule occurs while the structure of the ligand remains mostly unaffected.

Paoloni, D., Di Filippo, G., Cvetko, D., Kladnik, G., Morgante, A., Ruocco, A. (2020). Strong Chemical Interaction and Self-Demetalation of Zinc-Phthalocyanine on Al(100). JOURNAL OF PHYSICAL CHEMISTRY. C, 124(41), 22550-22558 [10.1021/acs.jpcc.0c06980].

Strong Chemical Interaction and Self-Demetalation of Zinc-Phthalocyanine on Al(100)

Paoloni D.;Di Filippo G.;Ruocco A.
2020

Abstract

We investigate the early stages of the growth of zinc-phthalocyanine on Al(100) using X-ray photoemission spectroscopy (XPS) and low-energy electron diffraction (LEED). Diffraction patterns show a (5 × 5) reconstruction, characteristic of flat-lying molecules forming a long-range-ordered structure with a square unit cell. The degree of ordering (i.e., the average domain size) is increased when the substrate is kept above 100 °C during the deposition. At low coverage (≤1 ML), a sizeable charge transfer from the substrate to the molecules is observed, indicating a strong interaction at the organic-inorganic interface. As a consequence of charge filling of ZnPc LUMO, a self-demetalation of the molecule occurs while the structure of the ligand remains mostly unaffected.
Paoloni, D., Di Filippo, G., Cvetko, D., Kladnik, G., Morgante, A., Ruocco, A. (2020). Strong Chemical Interaction and Self-Demetalation of Zinc-Phthalocyanine on Al(100). JOURNAL OF PHYSICAL CHEMISTRY. C, 124(41), 22550-22558 [10.1021/acs.jpcc.0c06980].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/378159
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