Distannylated dithiazologermole and germaindacenodithiazole were copolymerized with dibrominated benzothiadiazole and di(thiazolyl)benzothiadiazole to produce four new donor-acceptor conjugated copolymers. The optical, electrochemical, and thermal properties of the copolymers were characterized. DFT calculations revealed that these thiazole-containing copolymers possessed lower HOMOs and LUMOs than those of thiophene-based congeners, in accordance with the experimental results. The intramolecular noncovalent S‒N and N‒H bond interactions and the effects of the bridging atom (C or Ge) on the HOMO and LUMO energy levels were also suggested by the DFT calculations.
- Weipeng Sun
- Yohei Adachi
- Joji Ohshita
