Synthesis and property of helical ladder polymer comprising of fuzed benzothofhene ring

Keita Katayose*, Ichiro Takemura, Hiroyuki Nishide

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Thiaheterohelicenes have been often characterized by unique optical activity and stable doped state due to their π-electron-excess conjugation on the thiophene ring. Quantitative oxidation of the methylthio-substituted poly(1,3-phenylene) afforded the precursor polymer. The following intramolecular condensation gave the corresponding helical polymer comprised of fused benzothiophene unit without any structural defects. The MCD absorptions of the polythiaheterohelicene at 298 nm and 342 nm were assigned to the π-π* transition and an original energy transition of the fused ring structure respectively. The electronic state of doped polymer will be also discussed.

Original languageEnglish
Title of host publicationPolymer Preprints, Japan
Number of pages1
Publication statusPublished - 2005
Event54th SPSJ Symposium on Macromolecules - Yamagata
Duration: 2005 Sept 202005 Sept 22


Other54th SPSJ Symposium on Macromolecules


  • π-conjugation
  • Fuzed-ring
  • Helical structure
  • MCD
  • Sulfonium salt

ASJC Scopus subject areas

  • General Engineering


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