Introduction Electronic systems containing 2,1,3-benzothiadiazole subunits are fairly ubiquitous in the literature of electronically interesting and useful organic molecules.1 When the 2,1,3-benzothiadiazole acceptor (A) is connected to electron-rich alkoxy substituted donors (D) via alkynyl linkages in a D−π-A−π-D arrangement (A, Figure 1), for example, the conjugated systems display impressive and efficient emissive behavior associated with intramolecular charge-transfer in the excited...
