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 (8) and 4-ethynylphenylhydrogalvinoxyl (9) are polymerized with W, Mo chloride or Rh complex to yield their polyacetylene derivatives with molecular weight of ca. 104, while 2-ethynylphenalenone (10) gives only its oligomer. The polymers are soluble in common solvents and 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 x 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: Part A - Chemistry
28
11-12
DOI
出版ステータスPublished - 1991
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)

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