C-60 doping of multilayer 2,8,12,18-tetraethyl-5,15-diethynyl-3,7,13,17-tetramethylporphyrinato-Zn(II) (Zn-Pf) has been accomplished. The sublimed Zn-Pf molecules initially lay flat on the Cu(111) substrate and progressively tilt their arrangement in order to be oriented with the molecular plane nearly perpendicular to the Cu(111) substrate surface, at both monolayer and multilayer coverage, as detected by NEXAFS spectroscopy at the N K-edge. It is noteworthy that C-60 interacts with the Zn-Pf sample film producing a perturbation of the electronic structure reflected in the spectral changes at the C1s core level, at the N1s and shake-up satellites of Zn-Pf and in the VB region. By the strong spectral modification that occurs at the Zn-Pf multilayer sample C-60 diffusion into the substrate is also argued, giving rise most probably to an intercalated composite assembly with C-60 spheres in between two Zn-Pf planes. The observed changes are interpreted in terms of charge transfer taking place from C-60 to Zn-Pf with a lowering of the band gap and presence of occupied states closer to E-F.

Interface formation between C-60 and diethynyl-Zn-porphyrinato investigated by SR-induced photoelectron and near-edge X-ray absorption (NEXAFS) spectroscopies / Polzonetti, G; Battocchio, C; Goldoni, A; Larciprete, R; Carravetta, V; Paolesse, R; Russo, Maria Vittoria. - In: CHEMICAL PHYSICS. - ISSN 0301-0104. - 297:(2004), pp. 307-314. [10.1016/j.chemphys.2003.10.024]

Interface formation between C-60 and diethynyl-Zn-porphyrinato investigated by SR-induced photoelectron and near-edge X-ray absorption (NEXAFS) spectroscopies

RUSSO, Maria Vittoria
2004

Abstract

C-60 doping of multilayer 2,8,12,18-tetraethyl-5,15-diethynyl-3,7,13,17-tetramethylporphyrinato-Zn(II) (Zn-Pf) has been accomplished. The sublimed Zn-Pf molecules initially lay flat on the Cu(111) substrate and progressively tilt their arrangement in order to be oriented with the molecular plane nearly perpendicular to the Cu(111) substrate surface, at both monolayer and multilayer coverage, as detected by NEXAFS spectroscopy at the N K-edge. It is noteworthy that C-60 interacts with the Zn-Pf sample film producing a perturbation of the electronic structure reflected in the spectral changes at the C1s core level, at the N1s and shake-up satellites of Zn-Pf and in the VB region. By the strong spectral modification that occurs at the Zn-Pf multilayer sample C-60 diffusion into the substrate is also argued, giving rise most probably to an intercalated composite assembly with C-60 spheres in between two Zn-Pf planes. The observed changes are interpreted in terms of charge transfer taking place from C-60 to Zn-Pf with a lowering of the band gap and presence of occupied states closer to E-F.
2004
01 Pubblicazione su rivista::01a Articolo in rivista
Interface formation between C-60 and diethynyl-Zn-porphyrinato investigated by SR-induced photoelectron and near-edge X-ray absorption (NEXAFS) spectroscopies / Polzonetti, G; Battocchio, C; Goldoni, A; Larciprete, R; Carravetta, V; Paolesse, R; Russo, Maria Vittoria. - In: CHEMICAL PHYSICS. - ISSN 0301-0104. - 297:(2004), pp. 307-314. [10.1016/j.chemphys.2003.10.024]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/33727
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