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

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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.

元の言語English
ページ(範囲)3986-3991
ページ数6
ジャーナルMacromolecules
30
発行部数14
出版物ステータスPublished - 1997 7 14

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ASJC Scopus subject areas

  • Materials Chemistry

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