Tetrathiafulvalene- (TTF-) based macrocyclic systems, cages and supramolecularly self-assembled 3D constructs have been extensively explored as functional materials for sensing and switching applications.

A cryptand–rhodamine conjugated chemodosimeter can detect Hg(II) ion in aqueous medium selectively at ppb level in the presence of other biologically relevant metal ions and also shows a good viability to the HEK 293 cell line.