Two 3D coordination assemblies with same cluster configuration showing different magnetic behaviors: a ferromagnetic {[W(CN)8Co2(DMF)8][NO3]}n and a paramagnetic {W(CN)8Cu2(py)8}n
Two 3D coordination assemblies with same cluster configuration showing different magnetic behaviors: a ferromagnetic {[W(CN)8Co2(DMF)8][NO3]}n and a paramagnetic {W(CN)8Cu2(py)8}n
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DOI：
10.1039/c0ce00227e
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发表时间：
2011
期刊：
影响因子：
3.1
通讯作者：
J. Qian;Hua-Jun Zhao;Hongyang Wei;Jianghua Li;Jinfang Zhang;Hirofumi Yoshikawa;K. Awaga;Chi Zhang-Chi-Zh
中科院分区：
文献类型：
--
作者：
J. Qian;Hua-Jun Zhao;Hongyang Wei;Jianghua Li;Jinfang Zhang;Hirofumi Yoshikawa;K. Awaga;Chi Zhang-Chi-Zh
分子构筑块[W(CN)8]3DMF分别与Co(NO3)2·6H2O或Cu(ClO4)2·6H2O在不同反应条件下反应，得到两种三维金属配位聚合物{[WV(CN)8Co2(−)8][NO3]}N1和{wiv(CN)8Cu2(Py)8}N2。X-射线单晶结构分析表明，聚合物2中的[W(CN)8]3−离子在反应过程中被还原为[W(CN)8]4−，但聚合物1和2均为四方晶系，空间群为I41/a，并在菱形拓扑结构中具有相似的三维骨架.对配位聚合物1和2的磁性研究表明，聚合物1具有典型的铁磁性，其有序温度约为5K，而聚合物2由于具有抗磁性的八氰基金属酸桥-nc-wiv(S=0)-CN-而表现出顺磁行为。
Treatment of molecular building block [W(CN)8]3− with Co(NO3)2·6H2O or Cu(ClO4)2·6H2O in different reaction conditions affords two 3D (three-dimensional) metalloligand-bridged coordination polymers {[WV(CN)8Co2(DMF)8][NO3]}n1 and {WIV(CN)8Cu2(py)8}n2, respectively. The single-crystal X-ray structural analysis shows that both polymers 1 and 2 crystallize in the tetragonal crystal system with space group of I41/a and possess the similar 3D framework in a diamondoid topology geometry, although [W(CN)8]3− ion was reduced into [W(CN)8]4− in polymer 2 during the reaction process. The magnetic studies on coordination polymers 1 and 2 indicate that polymer 1 shows the typical ferromagnetic property with an ordering temperature of about 5 K but polymer 2 exhibits paramagnetic behavior due to the diamagnetic octacyanometalate bridge –NC–WIV(S = 0)–CN–.