| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5435411 | Synthetic Metals | 2017 | 6 Pages |
â¢New dithienogermole-containing polythiophenes were prepared by the Stille-coupling reactions.â¢Optical and electrochemical properties of the dithienogermole-containing polythiophenes were investigated.â¢The TFT activities of these polythiophene films were investigated, showing how the germole units affect the TFT activity.
Alternating copolymers composed of dithienogermole and thiophene, bithiophene, and dithienosilole (pDTG2-T, pDTG2-2T, and pDTG2-DTS2) were prepared by the Stille coupling reactions of dibromodithienogermole and the respective distannylthiophene derivatives. Examination of their electronic states with respect to their UV-vis absorption spectra and cyclic voltammograms (CVs) revealed enhanced conjugation in the order of pDTG2-TÂ <Â pDTG2-2TÂ <Â pDTG2-DTS2. However, the interchain Ï-Ï interaction of the polythiophenes in the film state was enhanced in the opposite order. The highest organic thin film transistor (OTFT) mobility was obtained for pDTG2-2T, indicating that the intermolecular Ï-Ï interaction affected the OTFT activity of the films more significantly than the intramolecular Ï-conjugation in these polythiophenes.
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