ABSTRACT
One of the most characteristic features of dipyrrinones is their preorganized arrangement of hydrogen bonding sites capable of self‐recognition. Dipyrrinones’ intra‐ or intermolecular recognition of carboxylic acid/carboxylate anion, carboxamide, or various inorganic anions is due to the complementarity of their hydrogen bonding patterns, best illustrated by the 3‐D structure of bilirubin. Anion recognition using pyrrole‐based receptors will also be briefly discussed as an extension of the dipyrrinone receptor.
