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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Melamine-induced synthesis of a structurally perfect kagomé antiferromagnet
Yongbing Shen1, Kunihisa Sugimoto2, Satoshi Yamashita3
1Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan. shen.yongbing.b1@tohoku.ac.jp.
Abstract:
We report here a structurally perfect kagomé lattice {[Cu3(bpy)6](SiF6)3(melamine)8} (1), where bpy is 4,4'-bipyridine and [SiF6]2- is a hexafluorosilicate anion. In comparison to general 1D linear, 2D layered and 3D cubic metal-organic frameworks, by using Cu2+ nodes and bpy ligands, a perfect kagomé lattice was synthesized by introducing C3 symmetrical melamine molecules. Magnetic susceptibility and low-temperature heat capacity measurements indicated weak antiferromagnetic interactions between the spins and no long-range magnetic ordering to 0.7 K. Using C3 symmetrical melamine molecules can be considered as a challenging synthetic strategy to afford new topological materials.
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