Synthesis, structure, and magnetism of three manganese-organic framework with PtS topology
Synthesis, structure, and magnetism of three manganese-organic framework with PtS topology
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DOI：
10.1007/s11426-014-5153-4
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发表时间：
2014-09
影响因子：
9.6
通讯作者：
Q. Meng;Fangna Dai;Liangliang Zhang;Rongming Wang;Daofeng Sun
中科院分区：
文献类型：
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作者：
Q. Meng;Fangna Dai;Liangliang Zhang;Rongming Wang;Daofeng Sun
以3,3 ',5,5 ' -联苯四羧酸（H4BPTC）为原料，溶剂热合成了Mn2(BPTC)(DMF)2（H2O）·DMF·3H2O(1)、Mn2(BPTC)(bipy)（DMF）·DMF·H2O(2)和Mn2(BPTC)(phen)（DMF）·EtOH(3)三个三维锰有机骨架。所有配合物均通过PXRD、EA、IR和TG进行了表征。结果表明，它们的平面节点和四面体节点的顶点符号均具有（42.84）（42.84）的PtS拓扑结构，其中BPTC配体被认为是一个方形平面的4连接连接体，与4个BPTC配体连接的每个双核SBU都被简化为四面体4连接节点。由于SBU的一个金属中心的三个配位位被配位溶剂分子占据，配合物1的稳定性较低。用2,2′-二吡啶或1,10-苯基取代两个配位溶剂分子后，配合物2和3显示出明显更高的结构稳定性。并对配合物2的磁性进行了详细的讨论。
Three 3D manganese-organic frameworks, Mn2(BPTC)(DMF)2(H2O)·DMF·3H2O (1), Mn2(BPTC)(bipy)(DMF)·DMF·H2O (2), and Mn2(BPTC)(phen)(DMF)·EtOH (3), have been solvothermally synthesized using 3,3′,5,5′-biphenyltetracarboxylic acid (H4BPTC). All complexes are characterized by PXRD, EA, IR and TG. The results show that they all bear the PtS topology with (42.84) (42.84) for the vertex symbols of the planar and tetrahedral nodes, in which the BPTC ligand is considered as a square-planar 4-connected linker, and every binuclear SBU connected to the four BPTC ligands is simplified into tetrahedral 4-connected nodes. Because the three coordination sites of one metal center of SBU are occupied by the coordinated solvent molecules, complex1exhibits low stability. After substituting 2,2′-bipy or 1,10-phen for two coordinated solvent molecules, complexes2and3display evidently higher structure stability. The magnetism property of complex2is also discussed in detail.