TY - JOUR
T1 - Synthesis and magnetic properties of nitronyl nitroxide radicals carrying a purine ring
AU - Nagashima, Hideaki
AU - Yoshioka, Naoki
AU - Inoue, Hidenari
N1 - Funding Information:
This work was supported by the Grant-in-Aid for Scientific Research (No. 3022392) from the Ministry of Education, Science, Sports and Culture of the Japanese Government.
PY - 2001/5/30
Y1 - 2001/5/30
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.
KW - Hydrogen bond
KW - Magnetic interaction
KW - Molecule-based magnetism
KW - Nitronyl nitroxide
KW - Purine
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U2 - 10.1016/S0277-5387(01)00587-3
DO - 10.1016/S0277-5387(01)00587-3
M3 - Article
AN - SCOPUS:0035972458
VL - 20
SP - 1151
EP - 1155
JO - Polyhedron
JF - Polyhedron
SN - 0277-5387
IS - 11-14
ER -