Construction of a novel topological frustrated system: a frustrated metal cluster in a helical space.
A novel topologically frustrated pentanuclear cluster helicate [{Cu(II)(μ-L)(3)}(2)Cu(II) (3)(μ(3)-OH)](3+) (L(-)=3,5-bis(2-pyridyl)pyrazolate) has been synthesized and characterized. This cluster has a helical arrangement of ligands around the central metal core. Dzyaloshinsky-Moriya interactions are essential components to observe a gradual magnetization and forbidden transitions of high-field/multi-frequency (HF/MF)-ESR. The origin of the magnetic anisotropy of this compound is influenced by its helical spin structure, and consequently, the Cu(5)-cluster helicate introduces a unique magnetic anisotropy. This observation is a direct evidence of the topological part of the new spin phase in a magnetic system.
Ishikawa
Ryuta
R
Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
Nakano
Motohiro
M
Fuyuhiro
Akira
A
Takeuchi
Tetsuya
T
Kimura
Shojiro
S
Kashiwagi
Takanari
T
Hagiwara
Masayuki
M
Kindo
Koichi
K
Kaizaki
Sumio
S
Kawata
Satoshi
S
D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D008670:Metals / Q000737:chemistry*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*
D008024:Ligands; D008670:Metals; D009942:Organometallic Compounds; D003300:Copper