TY - JOUR
T1 - Possible superhigh-spin cluster in the crystals of a novel nitronyl nitroxide radical as studied by FT pulsed ESR
AU - Shiomi, Daisuke
AU - Sato, Kazunobu
AU - Takui, Takeji
AU - Itoh, Koichi
AU - Tamura, Masafumi
AU - Nishio, Yutaka
AU - Kajita, Koji
AU - Nakagawa, Mitsutoshi
AU - Ishida, Takayuki
AU - Nogami, Takashi
PY - 1999
Y1 - 1999
N2 - Syntheses and magnetic properties of novel nitronyl nitroxide derivatives are reported. In the derivatives under study, the bulky tetramethylethylene group of the conventional nitronyl nitroxide has been replaced by aromatic rings, giving planar π-conjugation systems. The first half of the paper is devoted to the syntheses and characterization of new derivatives of such radical, 2-phenylbenzimidazol-1-yl-N,N′-dioxide (PBIDO). Chemical stability, π-spin density distribution, and solid state magnetic properties have been examined from solution ESR and static susceptibility measurements. In the latter half, we discuss an anomaly of paramagnetic relaxation found in crystals of PBIDO by pulsed ESR spectroscopy. The origin of the anomaly is attributed to a possible formation of paramagnetic species with huge S, or `super-high-spin cluster' at lattice defects in the crystal.
AB - Syntheses and magnetic properties of novel nitronyl nitroxide derivatives are reported. In the derivatives under study, the bulky tetramethylethylene group of the conventional nitronyl nitroxide has been replaced by aromatic rings, giving planar π-conjugation systems. The first half of the paper is devoted to the syntheses and characterization of new derivatives of such radical, 2-phenylbenzimidazol-1-yl-N,N′-dioxide (PBIDO). Chemical stability, π-spin density distribution, and solid state magnetic properties have been examined from solution ESR and static susceptibility measurements. In the latter half, we discuss an anomaly of paramagnetic relaxation found in crystals of PBIDO by pulsed ESR spectroscopy. The origin of the anomaly is attributed to a possible formation of paramagnetic species with huge S, or `super-high-spin cluster' at lattice defects in the crystal.
UR - http://www.scopus.com/inward/record.url?scp=0033351890&partnerID=8YFLogxK
U2 - 10.1080/10587259908028880
DO - 10.1080/10587259908028880
M3 - Conference article
AN - SCOPUS:0033351890
SN - 1058-725X
VL - 335
SP - 1071
EP - 1081
JO - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
T2 - Proceedings of the 1998 6th International Conference on Molecule Based Magnets (ICMM'98)
Y2 - 12 September 1998 through 17 September 1998
ER -