Magnetic properties of simple alkylene-aromatic polymers

Kazuyoshi Tanaka, Kazunari Yoshizawa, Akira Takata, Tokio Yamabe, Jun Yamauchi

研究成果: ジャーナルへの寄稿記事

15 引用 (Scopus)

抄録

This paper describes the results of the magnetization and the electron-spin resonance (ESR) measurements of the simplest members of alkylene-aromatic polymers (AAPs). In contrast with the previous claim of the observation of the ferromagnetism in AAPs, a distribution of the spin alignment giving 1 < S < 3/2 on the average has been concluded from the magnetization measurement. The spin concentration certainly coming from carbon π spins has turned out to be relatively small (∼1017-1018 spins·g -1). The ESR observation has revealed a forbidden Δm s = ± 2 transition characteristic of a triplet or higher multiplet state of radical pairs in agreement with the observation of the local spin alignment. The relationship between the spin state and the chemical structure of AAPs has also been examined with the use of the 13C NMR spectroscopy. It is concluded that in the present material there is a ferromagnetic coupling between a few of spins such as triphenylmethyl radicals forming spin clusters of triplet or higher spin multiplet state diluted in the whole bulk.

元の言語英語
ページ(範囲)6868-6872
ページ数5
ジャーナルThe Journal of Chemical Physics
94
発行部数10
DOI
出版物ステータス出版済み - 1 1 1991
外部発表Yes

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Aromatic polymers
Magnetic properties
magnetic properties
Paramagnetic resonance
Magnetization
polymers
Ferromagnetism
Nuclear magnetic resonance spectroscopy
Carbon
electron paramagnetic resonance
fine structure
alignment
magnetization
ferromagnetism
nuclear magnetic resonance
carbon

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

これを引用

Magnetic properties of simple alkylene-aromatic polymers. / Tanaka, Kazuyoshi; Yoshizawa, Kazunari; Takata, Akira; Yamabe, Tokio; Yamauchi, Jun.

:: The Journal of Chemical Physics, 巻 94, 番号 10, 01.01.1991, p. 6868-6872.

研究成果: ジャーナルへの寄稿記事

Tanaka, K, Yoshizawa, K, Takata, A, Yamabe, T & Yamauchi, J 1991, 'Magnetic properties of simple alkylene-aromatic polymers', The Journal of Chemical Physics, 巻. 94, 番号 10, pp. 6868-6872. https://doi.org/10.1063/1.460266
Tanaka, Kazuyoshi ; Yoshizawa, Kazunari ; Takata, Akira ; Yamabe, Tokio ; Yamauchi, Jun. / Magnetic properties of simple alkylene-aromatic polymers. :: The Journal of Chemical Physics. 1991 ; 巻 94, 番号 10. pp. 6868-6872.
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