Synthesis and magnetic property of poly[bis(4-methoxyphenyl) aminiumacetylene]s

Hidenori Murata, Daisuke Miyajima, Ryosuke Takada, Hiroyuki Nishide

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Poly[bis(4-methoxyphenyl)arniniumacetylene]s 1+ were designed and synthesized as π-conjugated polymer bearing multiple aminium radicals. Bis(4-methoxyphenyl)aminoacetylene and 1-methyl-2-bis(4-methoxyphenyl) aminoacetylene were synthesized and polymerized with a metathesis catalyst to yield poly[bis(4-methoxyphenyl)aminoacetylene] la and poly[1-methyl-2-bis(4- methoxyphenyl)aminoacetylene] 1b, respectively. The oxidation of 1 with SbCl5 gave the corresponding aminium polyradicals 1+. The introduction of a methyl group onto the polyacetylene backbone in 1b+ significantly enhanced the chemical stability or life-time of the poly(aminium radical). The high-spin ground state with an average 5 (spin quantum number) = 4/2 for lb+ was proven by magnetic susceptibility, magnetization, and ESR measurements.

Original languageEnglish
Pages (from-to)818-825
Number of pages8
JournalPolymer Journal
Volume37
Issue number11
DOIs
Publication statusPublished - 2005

Fingerprint

Bearings (structural)
Polyacetylenes
Conjugated polymers
Chemical stability
Magnetic susceptibility
Ground state
Paramagnetic resonance
Magnetization
Magnetic properties
Oxidation
Catalysts

Keywords

  • π-Conjugated Polymer
  • Aminium Cation Radical
  • Ferromagnetic
  • Interaction
  • Metathesis Polymerization
  • Polyacetylene

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Synthesis and magnetic property of poly[bis(4-methoxyphenyl) aminiumacetylene]s. / Murata, Hidenori; Miyajima, Daisuke; Takada, Ryosuke; Nishide, Hiroyuki.

In: Polymer Journal, Vol. 37, No. 11, 2005, p. 818-825.

Research output: Contribution to journalArticle

Murata, Hidenori ; Miyajima, Daisuke ; Takada, Ryosuke ; Nishide, Hiroyuki. / Synthesis and magnetic property of poly[bis(4-methoxyphenyl) aminiumacetylene]s. In: Polymer Journal. 2005 ; Vol. 37, No. 11. pp. 818-825.
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AB - Poly[bis(4-methoxyphenyl)arniniumacetylene]s 1+ were designed and synthesized as π-conjugated polymer bearing multiple aminium radicals. Bis(4-methoxyphenyl)aminoacetylene and 1-methyl-2-bis(4-methoxyphenyl) aminoacetylene were synthesized and polymerized with a metathesis catalyst to yield poly[bis(4-methoxyphenyl)aminoacetylene] la and poly[1-methyl-2-bis(4- methoxyphenyl)aminoacetylene] 1b, respectively. The oxidation of 1 with SbCl5 gave the corresponding aminium polyradicals 1+. The introduction of a methyl group onto the polyacetylene backbone in 1b+ significantly enhanced the chemical stability or life-time of the poly(aminium radical). The high-spin ground state with an average 5 (spin quantum number) = 4/2 for lb+ was proven by magnetic susceptibility, magnetization, and ESR measurements.

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