Incorporating sulfur into redox-active reagents and materials

Small sulfur-containing heterocycles, like thianthrenes and tetrathiafulvalenes, together with their larger π-extended counterparts, represent a long-known structural motif and offer reversible redox chemistry at low potentials. Recently these motifs gained an increasing interest in a variety of fields circulating organic chemistry ranging from molecular switches and redox reagents in synthesis to supramolecular aggregates. We anticipate fruitful developments from these versatile building blocks in modern technologies based on their reversible redox properties.