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シアン橋架け二元金属化合物[Ni(dimen)_2]_2[Fe(CN)_6](BPDS)_{0.5}・4H_2O (1)(dmen=1,1-dimethylethylendiamin; BPDS=4,4'-biphenyldisulfonate ion)は一次元鎖状構造で低温においてメタ磁性を示す。脱水処理で得られる[Ni(dmen)_2][Fe(CN)_6](BPDS)_0.5 (1a)は二次元...シート構造を持ち、T_c=10.7 K 以下で強磁性を示した。1aは空気中で吸湿して2水和物[Ni(dmen)_2]_2[Fe(CN)_6](BPDS)_{0.5}・2H_2O(1b)を与え、これは1と同様にメタ磁性を示した。1aと1bは吸湿／脱水処理で相互変換され、これに伴って強磁性とメタ磁性を可逆的に変換できる。
A cyanide-bridged bimetallic compound [Ni(dmen)_2]_2[Fe(CN)_6](BPDS)_{0.5}・4H_2O (1)(dmen=1,1-dimethylethylenediamine; BPDS=4,4'-biphenyldisulfonate ion)has a 1-D structure extended by Fe-CN-Ni linkages and shows metamagnetic nature at low temperature. Dehydration of 1 affords anhydrous [Ni(dmen)_2]_2[Fe(CN)_6](BPDS)_{0.5} (1a) that has a 2-D sheet structure and shows ferromagnetic ordering below T_c = 10.7 K . On hydration of 1a in open air, the dihydrate [Ni(dmen)_2]_2[Fe(CN)_6](BPDS)_{0.5}・2H_2O (1b) is obtained that shows metamagnetic nature like 1. 1a and 1b can be interconverted by hydration and dehydration with reversible change in magnetic nature between ferromagnetism and metamagnetism.show more
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teion02_p002