Rational Design of Two-Dimensional Nanoscale Networks by Electrostatic Interactions at Surfaces

ottom-up fabrication of two-dimensional periodic molecular nanostructures has gained extensive attention recently.1,2 Concepts of supramo-lecular chemistry have been successfully employed to attain nanostructures sup-ported at surfaces providing programmable topology via supramolecular assembly.311 Specific intermolecular interactions, e.g., hydrogen bonds, metal coordination, and van der Waals forces, have been used to link constituting building blocks. Also, interac-tions between polar regions of a molecule have been identified to steer molecular or-ganizations.12 Recently, ionic self-assembl