title: Direct synthesis of a metalloporphyrin complex on a surface.
abstract: We demonstrate that well-defined monolayers of a metal complex on a surface can be prepared by direct vapor deposition of the metal atoms on monolayers of the ligand. In particular, ordered monolayers of adsorbed tetraphenylporphyrin (2H-TPP) on a silver surface were exposed to cobalt vapors, resulting in the complexation of the metal by the porphyrin. The formation of the metal complexes was monitored by means of X-ray photoelectron spectroscopy (XPS), which reveals that this metalation reaction leads to a chemical equivalence of all four nitrogen atoms. The described in situ metalation provides a convenient way to produce adsorbed monolayers of more reactive (e.g., air- or solvent-sensitive) or thermally unstable metalloporphyrins that are difficult to evaporate or even to obtain as pure compounds at room temperature.
authors.affiliation: Universität Erlangen-Nürnberg, Lehrstuhl für Physikalische Chemie II, Egerlandstrasse 3, 91058 Erlangen, Germany. michael.gottfried@chemie.uni-erlangen.de
authors.forename: J Michael
authors.initials: JM
authors.lastname: Gottfried
authors.forename: Ken
authors.initials: K
authors.lastname: Flechtner
authors.forename: Andreas
authors.initials: A
authors.lastname: Kretschmann
authors.forename: Thomas
authors.initials: T
authors.lastname: Lukasczyk
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Steinrück