Acetylenic precursors are important reactants for creating
carbon-based architectures via linkage reactions. While their
capability of forming intermolecular bonds is well investigated in
solution, very few systematic studies have been carried out to
create alkyne-based nanostructures on metal substrates under
ultra-high vacuum conditions. Synthesizing extended and regular
carbon scaffolds requires a detailed knowledge of alkyne chemistry
in order to control reaction pathways and limit unwanted side
reactions. Using the bottom-up approach on metal surfaces, the
authors establish protocols to fabricate regular architectures
built up by the on-surface formation of selective organometallic
and C-C bonds with thoughtfully designed alkyne-functionalized
monomers. The structural and functional properties of the resulting
organometallic and covalent nanostructures are characterized by
means of scanning tunneling microscopy. The results open up new
perspectives in the fields of heterogeneous catalysis and the
on-surface synthesis of functional interfaces under mild reaction
conditions.
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