Synthesis and magnetic properties of conjugated stable polyradicals

Hiroyuki Nishide, Naoki Yoshioka, Takahiko Kaku, Takashi Kaneko, Masanori Yamazaki, Eishun Tsuchida

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Synthesis and magnetic properties of π-conjugated stable polyradicals bearing a polyacetylene backbone are described. 2,6-Di-tert-butyl-4-ethynylphenol and 4-ethynylphenylhydrogalvinoxyl are polymerized with W, Mo chloride or Rh complex to yield their polyacetylene derivatives with molecular weight of ca. 104, while 2-ethynylphenalenone gives only its oligomer. The polymers are soluble in common solvents and are converted to the corresponding conjugated polyradicals via heterogeneous chemical oxidation using PbO2 or alkaline K3Fe(CN)6. The polyradicals with extremely high spin concentration (up to 4.8 × 1023 spins/monomer mol) are obtained by regulating the oxidative conditions. The polyradicals are quite stable in solution and even in the solid state because of resonance stabilization and/or a steric effect of the substituents. Magnetic interactions between the unpaired spins in the conjugated stable polyradicals are discussed.

本文言語English
ページ(範囲)1177-1187
ページ数11
ジャーナルJournal of macromolecular science. Chemistry
A28
11-12
出版ステータスPublished - 1991 11

ASJC Scopus subject areas

  • Engineering(all)

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