Inspired by these advancements, we adopted a passive metal-templated strategy to synthesize the targeted [2]catenane 1 (Fig. ). Unlike conventional phenanthroline-based ligands, we utilized 2,2'-dipyrromethene (dipyrrin) to construct π-conjugated macrocycles composed exclusively of pyrrole and thiophene rings, enabling a globally delocalized electronic structure. Dipyrrin's ability to form stable complexes with metal ions made it an ideal template for mechanically interlocked [2]catenanes.