Controlled metalation of self-assembled porphyrin nanoarrays in two dimensions

Willi Auwärter, Alexander Weber-Bargioni, Susan Brink, Andreas Riemann, Agustin Schiffrin, Mario Ruben, Johannes V. Barth

Research output: Contribution to journalArticleOther

167 Citations (Scopus)

Abstract

We report a bottom-up approach for the fabrication of metalloporphyrin compounds and nanoarchitectures in two dimensions. Scanning tunneling microscopy and tunneling spectroscopy observations elucidate the interaction of highly regular porphyrin layers self-assembled on a Ag(111) surface with iron monomers supplied by an atomic beam. The Fe is shown to be incorporated selectively in the porphyrin macrocycle whereby the template structure is strictly preserved. The immobilization of the molecutor reactants allows the identification of single metalation events in a novel reaction scheme. Because the template layers provide extended arrays of reaction sites, superlattices of coordinatively unsaturated and magnetically active metal centers are obtained. This approach offers novel pathways to realize metallo-porphyrin compounds, low-dimensional metal-organic architectures and patterned surfaces which cannot be achieved by conventional means. 

Original languageEnglish
Pages (from-to)250-254
Number of pages5
JournalChemPhysChem
Volume8
Issue number2
DOIs
Publication statusPublished - 2 Feb 2007
Externally publishedYes

Keywords

  • Iron
  • Metalation
  • Porphyrin
  • Scanning probe microscopy
  • Self-assembly

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