π-Conjugated Polymers Consisting of Isothianaphthene and Dialkoxy-p-phenylene Units: Synthesis, Self-Assembly, and Chemical and Physical Properties

✍ Scribed by Takakazu Yamamoto; Motoaki Usui; Haruki Ootsuka; Takayuki Iijima; Hiroki Fukumoto; Yoshimasa Sakai; Shinji Aramaki; Hiroshi M. Yamamoto; Takehiko Yagi; Hiroyuki Tajima; Taku Okada; Takashi Fukuda; Akira Emoto; Hirobumi Ushijima; Miki Hasegawa; Hideki Ohtsu

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 629 KB
• Volume: 211
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.201000246

✦ Synopsis

Abstract

A series of π‐conjugated alternating copolymers consisting of Th‐ITN‐Th and p‐C~6~H~2~(OR)~2~ units were synthesized. XRD indicated that the copolymers assume an interdigitation packing mode, and UV‐Vis spectra revealed a strong tendency for self‐assembly. Upon molecular assembly of the copolymer, the UV‐Vis absorption shifted by about 100 nm to a longer wavelength from that of the single molecule. The copolymers underwent electrochemical oxidation (or p‐doping) and reduction (or n‐doping) at 0.2 and −2.0 V versus Ag^+^/Ag, respectively. A p‐doped copolymer film showed an electrical conductivity of 182 S · cm^−1^, and the temperature dependence of electrical conductivity was measured. The copolymer showed piezochromism and served as a p‐channel material for a field‐effect transistor.

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