Magnetic and electrical properties of poly(3-radical-substituted thiophene)s

Makoto Miyasaka, Tomoko Yamazaki, Eishun Tsuchida, Hiroyuki Nishide*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Radical groups, tert-butylnitroxide, nitronyl nitroxide, and 2,6-di-tert-butylphenoxyl, were introduced at the 3-position of thiophene, and the thiophene derivatives were then polymerized to yield poly(3-radical-substituted thiophene)s. The acetoxyphenyl-substituted thiophene gave regioregular poly(3-phenol-substituted thiophene) via oxidative polymerization with ferric chloride at low temperature, while the polymerization of the amine-substituted thiophenes did not proceed with any oxidizing agents under any reaction conditions. The phenoxyl-substituted polyradicals, 7 and 8, with spin concentrations of 0.30 and 0.25, respectively, displayed S values of 2/2 to 3/2 and 2/2, respectively, indicating an intramolecular ferromagnetic spin-coupling through the polythiophene backbone. The polyradicals, 7 and 8, themselves and the polyradical doped with iodine showed an electrical conductivity of 10-5 and 10-2 ∼ -1 S cm-1, respectively.

Original languageEnglish
Pages (from-to)1157-1162
Number of pages6
Issue number11-14
Publication statusPublished - 2001 May 30


  • π-Conjugated polymer
  • Electrical conductivity
  • High-spin polymer
  • Polyradical
  • Polythiophene

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry


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