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Controlled Metalation of Self‐Assembled Porphyrin Nanoarrays in Two Dimensions
Author(s) -
Auwärter Willi,
WeberBargioni Alexander,
Brink Susan,
Riemann Andreas,
Schiffrin Agustin,
Ruben Mario,
Barth Johannes V.
Publication year - 2007
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200600675
Subject(s) - porphyrin , metalation , scanning tunneling microscope , self assembly , nanotechnology , chemistry , monomer , metal , spectroscopy , materials science , photochemistry , stereochemistry , polymer , organic chemistry , physics , quantum mechanics
We report a bottom‐up approach for the fabrication of metallo‐porphyrin 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 molecular 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.