| Abstract: | A novel host−guest recognition motif based on a water‐soluble pillar7]arene ( WP7 ) and a 2,7‐diazapyrenium salt ( DMDAP ) was prepared. According to the integrated results of 1H NMR, 2D NOESY, UV–vis spectroscopy and fluorescence titration experiments, we demonstrated that the molecular recognition of WP7 to DMDAP in water not only has high association constant but also has pH‐responsiveness. Subsequently, we took advantage of this molecular recognition motif to fabricate a supra‐amphiphile based on WP7 and an amphiphilic 2,7‐diazapyrenium derivative DAPAC . Its controllable self‐assembly in water was also investigated by means of TEM and DLS techniques. |
