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Title: Probing magnetism in 2D molecular networks after in situ metalation by transition metal atoms
Authors: Schouteden, Koen ×
Ivanova, Tsveta
Li, Zhe
Iancu, Violeta
Janssens, Ewald
Van Haesendonck, Chris #
Issue Date: 6-Mar-2015
Series Title: Journal of Physical Chemistry Letters vol:6 pages:1048-1052
Abstract: Metalated molecules are the ideal building blocks for the bottom-up fabrication of, e.g., two-dimensional arrays of magnetic particles for spintronics applications. Compared to
chemical synthesis, metalation after network formation by an atom beam can yield a higher degree of control and flexibility and allows for mixing of different types of magnetic atoms. We report on successful metalation of tetrapyridyl-porphyrins (TPyP) by Co and Cr atoms, as
demonstrated by scanning tunneling microscopy experiments. For the metalation, large periodic networks formed by the TPyP molecules on a Ag(111) substrate are exposed in situ to an atom beam. Voltage-induced dehydrogenation experiments support the conclusion that
the porphyrin macrocycle of the TPyP molecule incorporates one transition metal atom. The newly synthesized Co-TPyP and Cr-TPyP complexes exhibit striking differences in their
electronic behavior, leading to a magnetic character for Cr-TPyP only as evidenced by Kondo resonance measurements.
ISSN: 1948-7185
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Translational Research in GastroIntestinal Disorders
× corresponding author
# (joint) last author

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