High-spin polyphenoxyls attached to star-shaped poly(phenylenevinylene)s

Hiroyuki Nishide, Makoto Miyasaka, Eishun Tsuchida

研究成果: Article

35 引用 (Scopus)

抄録

Star-shaped poly(1,2-phenylenevinylene)s 4-substituted with multiple pendant phenoxyls (2 and 3) were synthesized by polymerizing 2-bromo-4-(acetoxyphenyl)styrene in the presence of 1,3,5-triiodobenzene or 1,3,5-tris(3′,5′-diiodophenyl)benzene as the core via a simple one-pot Heck reaction and subsequent hydrolysis, phenolate formation, and heterogeneous oxidation. ESR spectra indicated a delocalized spin distribution into the core parts of the star-shaped molecules. The polyradicals, 2 and 3, were in a high-spin state at low temperature, and the ferromagnetic behavior was enhanced for the polyradical with a higher molecular weight. Although an average S of 3 remained at 3/2 to 4/2, the polyradical 2 even with a spin concentration of 0.8 spin/unit revealed an average S of 7/2 to 8/2. The 1,3,5-benzene core acted as an effective magnetic coupler to align the spins of the pendant phenoxyls through the star-shaped π-conjugated backbone.

元の言語English
ページ(範囲)7399-7407
ページ数9
ジャーナルJournal of Organic Chemistry
63
発行部数21
出版物ステータスPublished - 1998 10 16

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Stars
Benzene
Styrene
Paramagnetic resonance
Hydrolysis
Molecular weight
Oxidation
Molecules
Temperature

ASJC Scopus subject areas

  • Organic Chemistry

これを引用

High-spin polyphenoxyls attached to star-shaped poly(phenylenevinylene)s. / Nishide, Hiroyuki; Miyasaka, Makoto; Tsuchida, Eishun.

:: Journal of Organic Chemistry, 巻 63, 番号 21, 16.10.1998, p. 7399-7407.

研究成果: Article

Nishide, H, Miyasaka, M & Tsuchida, E 1998, 'High-spin polyphenoxyls attached to star-shaped poly(phenylenevinylene)s', Journal of Organic Chemistry, 巻. 63, 番号 21, pp. 7399-7407.
Nishide, Hiroyuki ; Miyasaka, Makoto ; Tsuchida, Eishun. / High-spin polyphenoxyls attached to star-shaped poly(phenylenevinylene)s. :: Journal of Organic Chemistry. 1998 ; 巻 63, 番号 21. pp. 7399-7407.
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