We report and rationalize the formation of gels, responsive to sodium cations or pH changes, in aqueous media by a supramolecular system constituted of an aryl extended calix[4]pyrrole receptor and the tetramethylammonium guest.
![Sodium and pH responsive hydrogel formation by the supramolecular system calix[4]pyrrole derivative/tetramethylammonium cation](https://www.iciq.org/wp-content/uploads/2014/03/Sodium-and-pH-responsive_2017.gif)
Sodium and pH responsive hydrogel formation by the supramolecular system calix[4]pyrrole derivative/tetramethylammonium cation
Chem. Commun. 2011, 47, 2017-2019.