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Structure and Magnetic Properties of a Bipyridine-bridged One-dimensional Ni(Ⅱ) Coordination Polymer
作者姓名:张富青  周晶晶  黄齐茂  周红  潘志权
作者单位:School of Chemistry and Environmental Engineering,Wuhan Institute of Technology
基金项目:the financial support from the National Natural Science Foundation of China(21171135); Hubei Provincial Science & Technology Department(2011BFA020); Hubei Independent Innovation Base(HBIR07)
摘    要:A polymer, [NiL(bipy)·2H2O]n(1, bipy = 4,4ˊ-bipyridine), has been acquired by the reaction of Ni(OAc)2·4H2O with N,Nˊ-bis(2-hydroxyl-5-fluorobenzyl)-2-hydrxylpropane dii- mine in the presence of 4,4ˊ-bipyridine. X-ray crystallographic analysis shows that it is comprised of a mononuclear Ni(Ⅱ) complex [NiL] linked by 4,4ˊ-bipyridine. Its crystal crystallizes in the orthorhombic system, space group C2/c with a = 22.595(3), b = 18.395(2), c = 15.434(2) , V = 6155(1)3, Dc = 1.259 g/cm-3, Z = 8, Mr = 583.23, F(000) = 2416.0, μ(MoKa) = 0.681 mm-1, S = 1.049, R = 0.0512 and wR = 0.1108 for 6032 observed reflections(I 2σ(I)). There are water hexamers in the complex. A weak overall ferromagnetic behavior has been evaluated by Curie-Weiss rule and by the formula of alternating ferro-ferromagnetic coupling in one-dimensional Ni(Ⅱ) chain, which gives g = 2.005(1) and J1 = 0.31(3) cm-1.

关 键 词:bipyridine-bridged coordination polymer  Ni(Ⅱ) complex  magnetic properties  water hexamer
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