Poly[(p-ethynylphenyl)hydrogalvinoxyl] and Its Polyradical Derivative with High Spin Concentration

Naoki Yoshioka, Hiroyuki Nishide, Takashi Kaneko, Hajime Yoshiki, Eishun Tsuchida

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

[4-[(3,5-Di-tert-butyl-4-hydroxyphenyl)(3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)-methyl]phenyl]acetylene (6), was synthesized and polymerized to yield a solvent-soluble polyacetylene poly-[[4-[(3,5-di-tert-butyl-4-hydroxyphenyl)(3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)methyl]phenyl] acetylene] (5a). The polymer gave its polyradical derivative 5b through the chemical oxidation with active PbO2. 5b was stable, whose spin concentration could be increased up to 4.8 × 1023 spins per molar monomer unit. ESR analysis indicated localization of unpaired electrons in the galvinoxyl residue. ESR analysis also suggested an exchange-narrowing and interpolymer dipole-dipole interaction.

Original languageEnglish
Pages (from-to)3838-3842
Number of pages5
JournalMacromolecules
Volume25
Issue number15
DOIs
Publication statusPublished - 1992 Jul 1
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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