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Zhao C, Sakurai T, Yoneda S, et al. Stabilization of Charge Carriers in Picket-Fence Polythiophenes Using Dielectric Side Chains. Chem Asian J. 2016;11(16):2284-90doi: 10.1002/asia.201600738.
Zhao, C., Sakurai, T., Yoneda, S., Seki, S., Sugimoto, M., Oki, C., Takeuchi, M., & Sugiyasu, K. (2016). Stabilization of Charge Carriers in Picket-Fence Polythiophenes Using Dielectric Side Chains. Chemistry, an Asian journal, 11(16), 2284-90. https://doi.org/10.1002/asia.201600738
Zhao, Chunhui, et al. "Stabilization of Charge Carriers in Picket-Fence Polythiophenes Using Dielectric Side Chains." Chemistry, an Asian journal vol. 11,16 (2016): 2284-90. doi: https://doi.org/10.1002/asia.201600738
Zhao C, Sakurai T, Yoneda S, Seki S, Sugimoto M, Oki C, Takeuchi M, Sugiyasu K. Stabilization of Charge Carriers in Picket-Fence Polythiophenes Using Dielectric Side Chains. Chem Asian J. 2016 Aug 19;11(16):2284-90. doi: 10.1002/asia.201600738. Epub 2016 Aug 09. PMID: 27503254.
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Chem Asian J. 2016 Aug 19;11(16):2284-90. doi: 10.1002/asia.201600738. Epub 2016 Aug 09.

Stabilization of Charge Carriers in Picket-Fence Polythiophenes Using Dielectric Side Chains.

Chemistry, an Asian journal

Chunhui Zhao, Tsuneaki Sakurai, Satoru Yoneda, Shu Seki, Manabu Sugimoto, Choji Oki, Masayuki Takeuchi, Kazunori Sugiyasu

Affiliations

  1. Molecular Design & Function Group, National Institute for Materials Science, 1-2-1?Sengen, Tsukuba, Ibaraki, 305-0047, Japan.
  2. Department of Materials Science and Engineering, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1?Tennodai, Tsukuba, Ibaraki, 305-8577, Japan.
  3. Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan.
  4. Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1?Yamadaoka, Suita, Osaka, 565-0871, Japan.
  5. Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan. [email protected].
  6. Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1?Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan.
  7. Department of Bioengineering, Nagaoka University of Technology, 1603-1?Kamitomioka, Nagaoka, Niigata, 940-2188, Japan.
  8. Molecular Design & Function Group, National Institute for Materials Science, 1-2-1?Sengen, Tsukuba, Ibaraki, 305-0047, Japan. [email protected].
  9. Department of Materials Science and Engineering, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1?Tennodai, Tsukuba, Ibaraki, 305-8577, Japan. [email protected].
  10. Molecular Design & Function Group, National Institute for Materials Science, 1-2-1?Sengen, Tsukuba, Ibaraki, 305-0047, Japan. [email protected].

PMID: 27503254 DOI: 10.1002/asia.201600738

Abstract

Insulated molecular wires (IMWs) are π-conjugated polymers that are molecularly sheathed with an insulating layer and are structurally analogous to electric power cords at the nanoscale. Such unique architectures are expected in molecular electronics and organic devices. Herein, we propose a new molecular design concept of IMWs, in which the sheaths can be customized, thereby enabling the modulation of the electronic properties of the interior π-conjugated systems. To this end, we focused our attention on the dielectric constant of the sheaths, as it governs the electrostatic interaction between charges. Upon doping, charge carriers, such as polaron and bipolaron, were generated regardless of the dielectric properties of the sheaths. Flash-photolysis time-resolved microwave conductivity measurements revealed that intrawire charge carrier mobility was independent of the sheaths. However, we found that the charge carriers could be stabilized by the sheaths with a high dielectric constant owing to the charge screening effect. We expect that IMWs designed in this way will be useful in a variety of applications, where the nature of charge carriers plays an important role, and particularly when redox switching is required (e.g., electrochromic, magnetic, and memory applications).

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: charge carriers; dielectric constants; insulated molecular wires; polythiophenes

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