Ladderlike ferromagnetic spin coupling network on a π-conjugated pendant polyradical

Takashi Kaneko*, Takahisa Makino, Hiroshi Miyaji, Masahiro Teraguchi, Toshiki Aoki, Makoto Miyasaka, Hiroyuki Nishide

*この研究の対応する著者

研究成果: Article査読

74 被引用数 (Scopus)

抄録

A poly(9,10-anthryleneethynylene)-based polyradical with two pendant stable phenoxyls in one anthracene skeleton was newly synthesized via polymerization of the corresponding bromoethynylanthracene monomer using a Pd(0) catalyst. The average molecular weight of the polymer reached M̄n = 5 × 103 and was soluble in common organic solvents. The polyradical was prepared from the corresponding hydroxyl precursor polymer and was appropriately stable at room temperature. The ESR spectrum of the corresponding monomeric radical suggested an effectively delocalized spin density distribution on the backbone anthracene. The magnetization and the static magnetic susceptibility of the polyradical were measured using a SQUID magnetometer. The large average spin quantum number (S̄ = 5/2) of the polyradical indicated that the ferromagnetic spin coupling network of the polyradical had spread throughout the π-conjugated chain and that it was considerably insensitive to spin defects.

本文言語English
ページ(範囲)3554-3557
ページ数4
ジャーナルJournal of the American Chemical Society
125
12
DOI
出版ステータスPublished - 2003 3月 26

ASJC Scopus subject areas

  • 化学 (全般)

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