Design and synthesis of piezochromic materials exploring intermolecular charge transfer: chalconoids bound to the -sulfonatocalix[6]arene macrocycle.

Solid-state systems composed of chalconoid encapsulated within -sulfonatocalix[6]arene (SCX6) scaffolds that exhibit mechanochromism and thermochromism have been developed. An introduction of a supramolecular host promises a variety of applications in diverse areas, which makes them fascinating. Largely hydrogen bonding as well as π···π interactions are responsible for the host-guest complexation.