State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China.
Dalton Trans. 2009 Oct 28(40):8548-54. doi: 10.1039/b907356f. Epub 2009 Aug 25.
Two copper phosphonates based on 4-(3-bromothienyl)phosphonic acid (BTPH2) with formula Cu(H2O)(BTP) (1) and [Cu2(4,4'-bpy)0.5(BTP)2].H2O (2) are reported. Compound 1 has a layered structure in which dimers of {Cu2O2}, made up of edge-sharing {CuO6} octahedra, are bridged by both the {PO3C} tetrahedra through corner-sharing and the water molecules. Compound 2 exhibits a novel layered structure where the {Cu2(BTP)2} columns, containing {Cu4O6} tetrameric cores and O-P-O linkages, are connected by 4,4'-bipyridine. In both cases, the 3-bromothienyl groups are grafted on the two sides of the layers. Magnetic studies reveal that antiferromagnetic interactions are mediated between the Cu(II) centers in 1, while for 2, weak ferromagnetism resulted from spin canting is observed. Electrochemical properties of compounds 1-2 are also investigated.
两种基于 4-(3-溴噻吩基)膦酸（BTPH2）的铜膦酸盐，化学式为 Cu(H2O)(BTP)（1）和 [Cu2(4,4'-bpy)0.5(BTP)2].H2O（2），被报道。化合物 1 具有层状结构，其中由共用边的 {CuO6} 八面体组成的 {Cu2O2} 二聚体通过角共享和水分子与 {PO3C} 四面体桥连。化合物 2 表现出一种新颖的层状结构，其中包含 {Cu4O6} 四聚体核心和 O-P-O 键的 {Cu2(BTP)2} 柱通过 4,4'-联吡啶连接。在这两种情况下，3-溴噻吩基基团都接枝在层的两侧。磁性研究表明，在 1 中，Cu(II)中心之间存在反铁磁相互作用，而对于 2，观察到源于自旋倾斜的弱铁磁性。还研究了化合物 1-2 的电化学性质。
