CHAPTER 11.2: Chalcogen‐Rich Compounds as Electron Donors Check Access

The search for new organic electron‐donor and electron‐acceptor materials has attracted enormous interest since the early 1970s. Since then, a vast number of different families of compounds have been developed and undoubtedly, among the electron donors, sulfur‐containing molecules represent an important series of compounds (e.g. derivatives of TTF and thiophene). In some cases, the larger chalcogen atoms, selenium and tellurium, have also been incorporated into the structures by substituting the sulfur atoms partially or completely to obtain more extensive intermolecular interactions and improved charge transport properties. In this chapter, we focus on the presentation of the main series of chalcogen‐rich electron donors and, when suitable, on a critical comparison of the properties of these materials by substitution with different chalcogen atoms. In the second edition of this chapter, we have incorporated the most relevant literature since the publication of the first edition, as well as a wider perspective of the application of these chalcogen‐rich compounds as electron donors