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

Fingerprint

purines
Oxides
Magnetic properties
magnetic properties
Curie-Weiss law
oxides
rings
Hydrogen Bonding
synthesis
Magnetic susceptibility
Hydrogen bonds
Crystalline materials
Derivatives
magnetic permeability
temperature dependence
Temperature
hydrogen
interactions
nitroxyl
purine

Keywords

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

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Synthesis and magnetic properties of nitronyl nitroxide radicals carrying a purine ring. / Nagashima, Hideaki; Yoshioka, Naoki; Inoue, Hidenari.

In: Polyhedron, Vol. 20, No. 11-14, 30.05.2001, p. 1151-1155.

Research output: Contribution to journalArticle

Nagashima, Hideaki ; Yoshioka, Naoki ; Inoue, Hidenari. / Synthesis and magnetic properties of nitronyl nitroxide radicals carrying a purine ring. In: Polyhedron. 2001 ; Vol. 20, No. 11-14. pp. 1151-1155.
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N2 - 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.

AB - 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.

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