“…More generally, controlled porosity is significant for, for example, supercapacitors6 and low‐dielectric‐constant‐materials for electronics 7. Within supramolecular chemistry, crystal engineering opens generic routes for the crystalline assembly of low‐molecular‐weight construction units in architecturally controlled frameworks1, 2, 8 through reversible intermolecular interactions, such as coordination bonds,3 metallo‐organic constructs,9 dipole–dipole coupling,8b hydrogen bonds,8 and their combinations 8. 10 However, growth of supramolecular framework single crystals from oligomers is a slow and delicate process, which encourages the search for robust approaches based on polymers.…”