Supramolecular Polymerization of Pseudo[2]rotaxanes Formation of <i>per</i> ‐Imidazole Pillar[5]arene‐based Host–Guest Complexations and Halogen Bonding Interactions

Abstract In this study, we reported the construction of 3D supramolecular polymeric networks using per ‐imidazole pillar[5]arene ( DIMP5 ) as a host and 1,4‐diiodotetrafluorobenzene ( L ) as a halogen bond donor in chloroform. The supramolecular polymerization process was characterized by 1 H NMR, 19 F NMR spectroscopy, and X‐ray single crystal analysis. The C─I⋯N distance (2.78 Å) and C─I⋯N angle (177°) clearly indicated the formation of halogen bonds in the crystal structure. Meanwhile, by introducing adiponitrile ( G ) as the guest, a supramolecular polymerization of pseudo[2]rotaxanes was also prepared, which was driven by DIMP5 ‐based host–guest complexations and halogen bonding interactions.