超分子的に制御できる分子磁性

概要

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Supramolecular techniques such as host-guest complex formation have been used to tune molecule-based magnetic materials. We will present two nano-porous magnetic materials, whose magnetic properties were changed by inclusion of small diamagnetic molecules. The first are low-temperature magnets derived from iron(II), N(CN)^-_2, and pyrimidine, which have guest molecules incorporated in the clearance of the 3-D framework. The T_c ranges from 3.3 K to 5.6 K, depending on the guest molecules. They are characterized as canted antiferromagnets below T_c. The second are hexanuclear wheel-shaped copper(II) complexes, whose crystals have a channel structure in a direction perpendicular to the molecular plane. The ferromagnetic interaction, which is ascribed to intermolecular contacts between the radical substituents, was remarkably enhanced by guest inclusion within a channel.
社団法人日本磁気学会の論文
2003-07-01