Hydrothermal synthesis, structures and magnetic studies of transition metal sulfates containing hydrazine.
Hydrothermal synthesis, structures and magnetic studies of transition metal sulfates containing hydrazine.
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DOI：
10.1021/ic101488k
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发表时间：
2011-01
影响因子：
4.6
通讯作者：
L. Jia;Ru-Yin Li;Zhiming Duan;Shangda Jiang;Bingwu Wang;Zheming Wang;Song Gao
中科院分区：
文献类型：
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作者：
L. Jia;Ru-Yin Li;Zhiming Duan;Shangda Jiang;Bingwu Wang;Zheming Wang;Song Gao
采用水热法合成了六种含肼（N（2）H（4））的过渡金属硫酸盐：[M（SO（4））（2）（N（2）H（5））（2）]（n）（M = Mn（1），Co（2），Ni（3））和[M（N（2）H（4））SO（4）]（n）（M = Mn（4），Co（5），Ni（6））.对它们的晶体结构和磁性进行了实验和理论研究。化合物1-3是以质子化肼分子为末端配体的一维硫酸根桥连均方链，化合物4-6是水合-硫酸根混合桥连均方链三维骨架。化合物1-6在M（2+）离子之间表现出反铁磁耦合，但由于单离子各向异性和晶体结构的不同，它们在低温下的磁性也不同。通过密度泛函理论计算分析了磁结构相关性和磁耦合机制。
By employing hydrothermal method, six transition metal sulfates containing hydrazine (N(2)H(4)) have been obtained: [M(SO(4))(2)(N(2)H(5))(2)](n) (M = Mn(1), Co(2), Ni(3)) and [M(N(2)H(4))SO(4)](n) (M = Mn(4), Co(5), Ni(6)). Their crystal structures and magnetic properties have been investigated experimentally and theoretically. Compounds 1-3 consist of one-dimensional sulfate bridged homometallic chains with protonated hydrazine molecule as terminal ligand, and compounds 4-6 are hydrazing-sulfate mixed bridged homometallic three-dimensional frameworks. Compounds 1-6 exhibit antiferromagnetic coupling between M(2+) ions, but their magnetic properties differ at low temperatures because of the different single-ion anisotropy and crystal structures. The magnetostructural correlations and the magnetic coupling mechanism are analyzed by density functional theory calculations (DFT).