Abstract
Polythieno[3,2-b]thiophene (PTT) was electrosynthesized by facile anodic oxidation of thieno[3,2-b]thiophene (TT) in three systems: boron trifluoride diethyl etherate (BFEE), acetonitrile (ACN), and dichloromethane solutions. The onset oxidation potential of TT in BFEE was determined to be 0.62 V vs. Ag/AgCl, which was much lower than those in ACN and dichloromethane solutions. PTT films exhibited excellent electrochemical property, high thermal stability, good redox activity, and stability. Free-standing PTT films with good mechanical property can be obtained from BFEE solution, whose structure and morphology were characterized by FT-IR, UV–visible spectra, and scanning electron microscopy. With an electrical conductivity of 1.5 S cm−1 and a Seebeck coefficient of 85 µV K−1 at 306 K, the as-prepared free-standing PTT films showed a certain thermoelectric property. The dimensionless figure-of-merit of PTT films was estimated to be 2.3 × 10−3 at 306 K, which was much higher than those of some organic thermoelectric materials reported previously. All these results indicated that PTT films may have potential applications in the thermoelectric field.
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NSFC (50663001, 50963002) and Jiangxi Province Jinggang Star Project (2008) are acknowledged for their financial supports.
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Yue, R., Chen, S., Lu, B. et al. Facile electrosynthesis and thermoelectric performance of electroactive free-standing polythieno[3,2-b]thiophene films. J Solid State Electrochem 15, 539–548 (2011). https://doi.org/10.1007/s10008-010-1095-8
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DOI: https://doi.org/10.1007/s10008-010-1095-8