Layered electron acceptors by dimerization of acenes end- capped with 1,2,5-thiadiazoles

Layered electron acceptors D1-4 equipped with terminal 1,2,5-thiadiazole groups have been constructed using a one-pot protocol of acene dimerization. Their molecular structures are determined using single-crystal X-ray diffraction analysis. Photophysical and electrochemical properties of these molecules present a marked dependence on conjugation length and molecular geometry. An aggregation-induced emission peak and an intramolecular excimer emission (IEE) band were observed for D2 and D4, respectively. This work paves the way for the efficient synthesis of layered heteroacenes. Dimerization of heteroacenes: Layered electron acceptors equipped with terminal 1,2,5-thiadiazole groups were constructed using a one-pot protocol of acene dimerization. Crystal structures of the compounds and their photophysical and electrochemical properties were studied.