Poly(thiaheterohelicene): Control of fused helical structure and its morphology

Ichiro Takemura, Yuko Masumoto, Hiroyuki Nishide

研究成果: Conference contribution

抄録

Helicenes are characterized by fused ring π-conjugation and its stiff structure, and have been expected to be stable magneto-optical molecules. However, they must be synthesized stepwise, therefore, there were no reports on synthesis of the helicenes having sufficient length as a π-conjugated polymer. We have developed the facile synthesis of the poly(thiaheterohelicene)s using ring-closing reaction via the sulfonium salts. Poly(1,3-phenylene)s bearing thioalkyl groups were polymerized with Pd(0) catalyst. Ring-closing reaction with strong acid followed oxidation reaction of the sulfide to produce the sulfonium derivatives. Poly(thiaheterohelicene)s were synthesized via dealkylation reaction of the sulfonium polymers with strong base. Its helicity was controlled with hydrophobic effect or inter-molecular interaction. Polarized optical micrographic imaging of poly sulfonium bearing dodecylthio groups revealed birefringence and it was changed with casting solvents. Radical formation on I2-doped poly(thiaheterohelicene) was detected with UV-vis and ESR spectrum. The electrical conductivity of the doped poly(helicene) was developed than the undoped polymer.

本文言語English
ホスト出版物のタイトルPolymer Preprints, Japan
ページ3034-3035
ページ数2
55
2
出版ステータスPublished - 2006
イベント55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama
継続期間: 2006 9 202006 9 22

Other

Other55th Society of Polymer Science Japan Symposium on Macromolecules
CityToyama
Period06/9/2006/9/22

ASJC Scopus subject areas

  • 工学(全般)

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