Polymerization of (p-vinylphenyl)hydrogalvinoxyl and formation of a stable polyradical derivative

Autor:	Hiroyuki Tatsumi, Eishun Tsuchida, Takashi Kaneko, Hajime Yoshiki, Naoki Yoshioka, Toshiki Aoki, Eizo Oikawa, Hiroyuki Nishide
Rok vydání:	1999
Předmět:	chemistry.chemical_classification Polymers and Plastics Organic Chemistry Radical polymerization Polymer Magnetic susceptibility Styrene chemistry.chemical_compound Magnetization chemistry Polymerization Galvinoxyl Polymer chemistry Materials Chemistry Organic chemistry Derivative (chemistry)
Zdroj:	Journal of Polymer Science Part A: Polymer Chemistry. 37:189-198
ISSN:	1099-0518 0887-624X
Popis:	4-[(3,5-Di-tert-butyl-4-hydroxyphenyl)(3,5-di-tert-butyl-4-oxo-cyclohexa- 2,5-dienylidene)methyl]styrene (abbreviated as (p-vinylphenyl)hydrogalvinoxyl) was polymerized using AIBN as an initiator to give a bright yellow polymer with Mw = 3.2 × 104. The polymer was oxidized to give the corresponding polyradical derivative, whose spin concentration could be increased up to about 70 mol % depending on oxidative conditions. ESR signal line-width in the solid state was greatly increased below 200 K for the polyradical with a high spin concentration (> 50 mol %). The magnetization and magnetic susceptibility indicated weak antiferromagnetic interaction among the radical sites. © 1999 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 37: 189–198, 1999
Databáze:	OpenAIRE
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