著者

宮島 直美 坂本 暦 松本 尚英 大川 尚士

出版者

一般社団法人 日本液晶学会

雑誌

液晶討論会講演予稿集 (ISSN:18803539)

巻号頁・発行日

vol.22, pp.91-92, 1996

---

Nickel(II) and copper(II) complexes of [M(salen)] type, stubstituted with (3,4,5-trihexadecenoxybenzoyl)oxy groups at both ends, have been newly prepared and their mesomorphic behaviors characterized. It proved that they have desirably low melting and clearing temperatures, and the mesophase is commonly of smectic type. This is in contrast to the case of discogenic oxovanadium(IV) complex analogues,¹ which indicates that the kind of central metal atom in [M(salen)] mesogens is a primarily important factor in determining the mesophase type.

著者

臼杵 直樹 大場 正昭 大川 尚士

出版者

九州大学理学部極低温実験室

雑誌

九州大学極低温実験室だより (ISSN:13460161)

巻号頁・発行日

vol.2, pp.2-7, 2001-06

---

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.