Regioregular polythiophenl with pendant phenoxyl radicals: A new high-spin organic polymer

Makoto Miyasaka*, Tomoko Yamazaki, Eishun Tsuchida, Hiroyuki Nishide


研究成果: Article査読

55 被引用数 (Scopus)


Poly[3-(3', 5'-di-tert-butyl-4'-acetoxyphenyl)thiophene] (la) was regioselectively synthesized via simple oxidative polymerization of 3-(3', 5'-di-ferf-butyl-4'-acetoxyphenyl)thiophene (2a) with ferric chloride. Head-to-tail content of la with a molecular weight of > 104 reached 96% by modulating both the polymerization conditions and the purification procedure of the polymer. Visible absorption and fluorescence maxima were bathochromically shifted for both la and poly[3-(3', 5'-di-tert-butyl-4'hydroxyphenyl)thiophene] (Ib), which suggests an extended, -r-conjugation, i.e., a regioregular structure. Redox of the phenolate and of the thiophene residue of Ib was observed reversibly and independently under alkaline conditions. The polyphenoxyl 1 derived from the oxidation of Ib showed an electrical conductivity of 10-5 S cm-1. The polyradical 1 satisfies both an alternant but non-Kekulé-type π-conjugation and ferromagnetic connectivity of the unpaired electrons of the pendant phenoxyls. 1 with a spin concentration of 0.3 spin/unit displayed a spin quantum number (S) value of 2/2 to %, indicating a highspin ground state and an intramolecular ferromagnetic spin coupling through the polythiophene backbone.

出版ステータスPublished - 2000

ASJC Scopus subject areas

  • 材料化学


「Regioregular polythiophenl with pendant phenoxyl radicals: A new high-spin organic polymer」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。