title: Surface Porphyrins Metalate with Zn Ions from Solution.
abstract: Controlling the metalation of surface porphyrins is a critical process in porphyrin-based devices. Indeed, surface porphyrins are known to metalate in ultrahigh vacuum from codeposited metal atoms or substrate atoms; however, it is not yet known if surface porphyrins could metalate from ions in solution, that is, the most likely environment for porphyrin-based devices. Using X-ray photoelectron spectroscopy we have studied the metalation of monolayers and multilayers of a free-base tetraphenyl porphyrin adsorbed on Au(111) with ions in solution. We found that full metalation with Zn(2+) can be achieved already at room temperature in contrast with the elevated temperatures required for metalation with codeposited metal atoms.
authors.affiliation: Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg , Egerlandstraße 3, 91058 Erlangen, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Franke
authors.affiliation: Departamento de Química Inorgánica, Analítica y Química Física, INQUIMAE-CONICET, Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria , Pabellón 2, Buenos Aires C1428EHA, Argentina.
authors.forename: Florencia
authors.initials: F
authors.lastname: Marchini
authors.affiliation: Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg , Egerlandstraße 3, 91058 Erlangen, Germany.
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Steinrück
authors.affiliation: Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg , Egerlandstraße 3, 91058 Erlangen, Germany.
authors.forename: Ole
authors.initials: O
authors.lastname: Lytken
authors.affiliation: Departamento de Química Inorgánica, Analítica y Química Física, INQUIMAE-CONICET, Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria , Pabellón 2, Buenos Aires C1428EHA, Argentina.
authors.forename: Federico J
authors.initials: FJ
authors.lastname: Williams
keywords: XPS; ZnTPP; free-base porphyrin; metalation; surface