π-Conjugated polymers consisting of isothianaphthene and dialkoxy-p-phenylene units: Synthesis, self-assembly, and chemical and physical properties

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

A series of π-conjugated alternating copolymers consisting of Th-ITN-Th and p-C6H2(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 100nm 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 -2.0V 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.

Original languageEnglish
Pages (from-to)2138-2147
Number of pages10
JournalMacromolecular Chemistry and Physics
Volume211
Issue number19
DOIs
StatePublished - 2010/10/01

Keywords

  • Conducting polymers
  • Conjugated polymers
  • Isothianaphthene
  • Polyaromatics
  • Self-assembly

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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