3-d:5,4-d ']bisthiazole and Their Diketopyrrolopyrrole Based Low-Bandgap Copolymers Chalcogen Bridged Thieno- and Selenopheno[2

2018 American Chemical Society. We report the synthesis and characterization of four novel small bandgap copolymers incorporating the electron-deficient thieno[2,3-d:5,4-d]bisthiazole and selenopheno[2,3-d:5,4-d]bisthiazole building blocks with a series of electron-deficient diketopyrrolopyrole units. The four resultant copolymers were synthesized via palladium Stille cross-coupling reaction, and their optical, thermal stability, electrochemical, and field-effect charge transport properties were investigated. All copolymers showed low optical bandgaps (1.53-1.56 eV); in addition, X-ray diffraction on solution-cast films revealed that the selenium-containing copolymers exhibit higher crystallinity compared to their thiophene counterparts.

Patra, D., Lee, J., Dey, S., Lee, J., Kalin, A. J., Putta, A., ... Al-Hashimi, M.

Patra, Dhananjaya||Lee, Jaehyuk||Dey, Somnath||Lee, Jongbok||Kalin, Alexander J||Putta, Anjaneyulu||Fei, Zhuping||McCarthy-Ward, Thomas||Bazzi, Hassan S||Fang, Lei||Heeney, Martin||Yoon, Myung-Han||Al-Hashimi, Mohammed

Chalcogen Bridged Thieno- and Selenopheno[2,3-d:5,4-d ']bisthiazole and Their Diketopyrrolopyrrole Based Low-Bandgap Copolymers Academic Article