Alkylenesulfanyl-Bridged Bithienyl Cores for Simultaneous Tuning of Electronic, Filming, and Thermal Properties of Oligothiophenes

DPY and DPE alkylenesulfanyl-bridged bithienyls were prepared by a highly effective ring-closing reaction via arylalkylsulfonium intermediate and used as inner cores in oligothiophenes. HOMO−LUMO energy levels, conformational flexibility, and intrinsic asymmetry of the cores are reflected in the electronic, film-forming, and thermal properties of the corresponding oligomers.