Synthesis, crystal structure, and magnetic properties of a copper(II) octacyanotungstate(V)-based magnet containing two types of organic ligands

Synthesis, crystal structure, and magnetic properties of a copper(II) octacyanotungstate(V)-based magnet containing two types of organic ligands
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含有两种有机配体的八氰钨酸铜(II)基磁体的合成、晶体结构和磁性能

DOI:
10.1016/j.poly.2008.10.065
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发表时间:
2009
期刊:
影响因子:
2.6
通讯作者:
S. Ohkoshi
S. Ohkoshi
中科院分区:
化学3区
文献类型:
--
作者:
Souhei Kaneko;Yoshihide Tsunobuchi;K. Nakabayashi;S. Ohkoshi

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合成了含两种有机配体(嘧啶和3-氰基吡啶)的氰桥联八氰钨酸铜(Cu3[W(CN)8]2(pyrimidine)2(3-cyanopyridine)2·4H2O,)。在该化合物中,W的配位构型是一个8配位的双头三棱柱,其中5个CN基团[W(CN)8]桥联到5个铜离子上,其余3个CN基团是自由的。三种铜离子(Cu1、Cu2、Cu3)的配位构型均为六配位准八面体。氰基桥联-Cu2-W-Cu3-层由Cu1柱单元连接,沿a轴存在空穴,空穴被3-氰基吡啶分子和沸石水分子占据。该化合物具有亚磁性,其居里温度为7K,饱和磁化强度为2.9μB,在2K下的矫顽场为7Oe。
Cu3[W(CN)8]2(pyrimidine)2(3-cyanopyridine)2·4H2O, a cyanide-bridged copper(II) octacyanotungstate(V) with two types of organic ligands (pyrimidine and 3-cyanopyridine), is prepared. In this compound, the coordination geometry of W is an 8-coordinated bicapped trigonal prism where five CN groups of [W(CN)8] are bridged to five Cu ions, and the remaining three CN groups are free. The coordination geometries of the three types of Cu ions (Cu1, Cu2, and Cu3) are 6-coordinated pseudo-octahedron. The cyano-bridged-Cu2–W–Cu3-layer is linked by a Cu1 pillar unit, and a cavity along the a axis, which is occupied by 3-cyanopyridine molecules and zeolitic water molecules, exists. The present compound shows ferrimagnetism with a Currie temperature of 7K, a saturation magnetization of 2.9μB, and a coercive field of 7Oe at 2K.
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影响因子: 4.9
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DOI: --
发表时间: 2008
期刊: Bull. Chem. Soc. Jpn. 81
影响因子: --
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发表时间: 2008-01-01
影响因子: 16.6
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