Poly(1,2-phenylenevinylene)s bearing nitronyl nitroxide and galvinoxyl at the 4-position: π-Conjugated and non-Kekulé-type polyradicals with a triplet ground state

Hiroyuki Nishide, Yasuhiro Hozumi, Takeshi Nii, Eishun Tsuchida

研究成果: Article査読

28 被引用数 (Scopus)

抄録

Poly[4-(4′,4′,5′,5′-tetramethyl-3′-oxido- 1′-oxylimidazolinium-2′-yl)-1,2-phenylenevinylene] (1) and poly[4-[(3,5-di-tert-butyl-4-oxyphenyl)(3,5-di-tert-butyl-4-oxocyclohexa-2,5- diene-1-ylidene)methyl]-1,2-phenylenevinylene] (2) were synthesized via the polymerization of 2-bromo-4-[1′,3′-bis(tert-butyldimethylsiloxy)-4′,4′, 5′,5′-tetramethylimidazolin-2′-yl]styrene (10) and 2-iodo-4-[(3,5-di-tert-butyl-4-acetoxyphenyl)(3,5-di-tert-butyl-4-oxocyclohexa- 2,5-dien-1-ylidene)methyl]styrene (12), respectively, using a palladium catalyst. Their spin (radical) concentration could be increased beyond 0.9 per molar monomer unit, and they were stable even in air at room temperature. The polyradicals satisfied an alternant but non-Kekulé-type π-conjugated structure and displayed a triplet ground state or an intramacromolecular ferromagnetic spin coupling in the SQUID magnetization measurement.

本文言語English
ページ(範囲)3986-3991
ページ数6
ジャーナルMacromolecules
30
14
出版ステータスPublished - 1997 7 14

ASJC Scopus subject areas

  • Materials Chemistry

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