| 以2,4,4′-联苯三羧酸及2,2′-联吡啶构筑的三维钴(II)配位聚合物的合成、晶体结构及磁性质 |
| Synthesis, Crystal Structure and Magnetic Properties of a 3D Cobalt(II) Coordination Polymer Constructed from Biphenyl-2,4,4′-Tricarboxylate and 2,2′-bipyridine |
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| 摘要: 通过水热方法，以2,4,4′-联苯三羧酸(H3btc)和2,2′-联吡啶(2,2′-bpy)与CoCl2?6H2O反应，合成了一个具有三核钴单元的三维配位聚合物[Co1.5(btc)(2,2′-bpy)0.5(2H2O)]n，并对其结构和磁性质进行了研究。结构分析结果表明该聚合物的晶体属于单斜晶系，I2/c空间群。来自四个不同btc3–配体的四个羧基连接相邻的三个钴(II)离子形成了一个三核钴(II)的结构单元。这些三核钴(II)的结构单元又通过btc3–配体与钴(II)离子的配位作用形成了一个三维的框架。研究表明，该聚合物中相邻钴(II)离子之间存在铁磁相互作用。 |
| 关键词: 配位聚合物 钴(II)配合物 磁性 |
| 基金项目: 省自然科学基金 |
| Abstract: A coordination polymer, namely [Co1.5(btc)(2,2′-bpy)0.5(2H2O)]n (1) has been constructed hydrothermally using H3btc (H3btc=biphenyl-2,4,4′-tricarboxylic acid), 2,2′-bpy (2,2′-bpy= 2,2′-bipyridine), and CoCl2.6H2O. The compound crystallizes in the monoclinic system, space group I2/c with a=1.8908(3) nm, b=1.14227(10) nm, c=1.77436(19) nm, β=105.178(13)o, V=3.6986(7) nm3, Dc=1.745 g.cm-3, Z=8, R=0.0484 and wR=0.0867 (I＞2σ(I)). The three neighboring Co(II) ions are bridged by means of four carboxylate groups from the four different btc3– ligands, giving rise to a centrosymmetric trinuclear Co(II) subunit. The adjacent Co3 subunits are further linked by the btc3– blocks into a 3D framework. Magnetic susceptibility measurement indicates that compound 1 shows a ferromagnetic coupling between the Co(II) ions. CCDC: 962833. |
| Keywords: coordination polymer cobalt(II) compound magnetic properties |
| 投稿时间：2013-09-26 修订日期：2014-01-26 |
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