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Abstract:
The self-assembly of iron-coordinated two-dimensional metal-organic
networks on a Cu(100) surface has been investigated by scanning
tunneling microscopy under ultra-high-vacuum conditions. We applied
three rodlike polybenzene dicarboxylic acid molecules with different
backbone lengths as organic linkers. The three linker molecules form
topologically identical rectangular networks with Fe, all comprising
iron pairs as the network nodes. Whereas the length of the linker
molecules defines the dimension of the networks, the substrate also
significantly influences the structural details, e. g., network
orientation with respect to the substrate, geometric shape of the
network cavities, Fe-carboxylate coordination configuration, and
iron-iron distance.
