Metal-phthalocyanine ordered layers on Au(110): Metal-dependent adsorption energy

Journal Article · Sat Jun 28 04:00:00 EDT 2014 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4883735· OSTI ID:22311391

Massimi, Lorenzo; Angelucci, Marco; Gargiani, Pierluigi; Betti, Maria Grazia ^[1]; Montoro, Silvia ^[2]; Mariani, Carlo ^[3]

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1. Dipartimento di Fisica, Università di Roma La “Sapienza,” 00185 Roma (Italy)
2. IFIS Litoral, CONICET-UNL, Laboratorio de Fisica de Superficies e Interfaces, Güemes 3450, Santa Fe (Argentina)
3. Dipartimento di Fisica, CNISM, Università di Roma La “Sapienza,” 00185 Roma (Italy)

Iron-phthalocyanine and cobalt-phthalocyanine chains, assembled along the Au(110)-(1×2) reconstructed channels, present a strong interaction with the Au metallic states, via the central metal ion. X-ray photoemission spectroscopy from the metal-2p core-levels and valence band high-resolution ultraviolet photoelectron spectroscopy bring to light signatures of the interaction of the metal-phthalocyanine single-layer with gold. The charge transfer from Au to the molecule causes the emerging of a metal-2p core level component at lower binding energy with respect to that measured in the molecular thin films, while the core-levels associated to the organic macrocycle (C and N 1s) are less influenced by the adsorption, and the macrocycles stabilize the interaction, inducing a strong interface dipole. Temperature Programmed Desorption experiments and photoemission as a function of temperature allow to estimate the adsorption energy for the thin-films, mainly due to the molecule-molecule van der Waals interaction, while the FePc and CoPc single-layers remain adsorbed on the Au surface up to at least 820 K.

• OSTI ID: 22311391
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 24 Vol. 140; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ADSORPTION
BINDING ENERGY
DESORPTION
GOLD
INTERFACES
IONS
IRON
LAYERS
MOLECULES
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PHTHALOCYANINES
STRONG INTERACTIONS
SURFACES
TEMPERATURE DEPENDENCE
THIN FILMS
VAN DER WAALS FORCES
X RADIATION