Synthesis and magnetic properties of nitronyl nitroxide radicals carrying a purine ring

Hideaki Nagashima, Naoki Yoshioka, Hidenari Inoue

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

2-(Purin-8-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxyl-3-oxide (Pu-NN) was designed and synthesized. Two crystalline phases (α- and β-phases) exhibiting different IR spectral patterns at the vNH region were obtained depending on the crystallizing condition. The temperature dependences of the magnetic susceptibility of these two phases followed Curie-Weiss law with θ = - 5.7 K (α-phase) and θ = - 0.3 K (β-phase) implying intermolecular antiferromagnetic interaction, which were quite different from that of parent benzimidazole derivative, 2-(benzimidazol-2-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H- imidazolyl-1-oxyl-3-oxide that formed a 1-D ferromagnetic chain induced by an intermolecular hydrogen bonding.

Original languageEnglish
Pages (from-to)1151-1155
Number of pages5
JournalPolyhedron
Volume20
Issue number11-14
DOIs
Publication statusPublished - 2001 May 30

Keywords

  • Hydrogen bond
  • Magnetic interaction
  • Molecule-based magnetism
  • Nitronyl nitroxide
  • Purine

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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