Chemically Responsive Supramolecular Structural Change of Pillar[5]arene Nanotubes

We prepared organo-nanotubes from pillar[5]arene molecules via intermolecular hydrogen bonding between the molecules. In the absence of guest molecules, formation of the nanotubes was observed simply by heating a solution of pillar[5]arene in a suitable solvent. In contrast, formation of the nanotubes did not occur in the presence of guest molecules.