developed into elaborate hosts that fix a target molecule in a controlled geometry through multipoint interactions. We now report the synthesis of a bowl‐shaped macrocyclic trimer of the boron–dipyrrin (BODIPY) complex and its unidirectional threading of guest molecules. Six polarized Bδ+−Fδ‐ bonds are directed towards the center of the macrocycle, which enables strong recognition of cationic guests. Specifically
AbstractMacrocyclic BODIPY/dipyrrin tetramers and pentamers connected by m‐phenylene linkers were synthesized. Their uniquely folded shapes were revealed by a single‐crystal X‐ray diffraction analysis, and their dynamic structural behaviors in solution were investigated by variable‐temperature NMR measurements. The BODIPY oligomers exhibited strong emission properties without quenching. Furthermore, the BODIPY pentamer interacted with an ammonium cation utilizing the negatively charged binding pockets in which the polarized Bδ+–Fδ− bonds are present.