Magnetic properties after irradiation of poly(m-phenyleneethynylene) having diazo and nitronylnitroxide groups and its model compounds

Takeyuki Akita, Noboru Koga

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In order to achieve a pure organic high-spin molecule, poly(m-phenyleneethynylene) derivative 1 having diazo groups and nitronyl nitroxide moieties alternately were designed. Its three model compounds, diphenylacetylene derivative 2, bis(phenylethynyl)benzene derivative 3, and oligomeric compound 4 having partial structure of 1 have been prepared by the coupling reaction of ethynyl derivatives of phenylnitronylnitroxide and iodo derivatives of diphenyldiazomethane. Field dependence of magnetization after irradiation of 2 and 3 in frozen solutions suggested that the photo-generated species have quartet and quintet ground states with J/kB values of + 1.75 and + 1.09 K, respectively. However, spin interaction between carbene and nitronylnitroxide through 3,3-diphenylacetylene moiety is not strong enough to form high-spin chain having long correlation length for 4.

Original languageEnglish
Pages (from-to)1475-1477
Number of pages3
JournalPolyhedron
Volume20
Issue number11-14
DOIs
Publication statusPublished - May 30 2001

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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