| 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1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/a空间群，a=1.7744(4)nm，b=1.1423(2)nm，c=1.8908(4)nm，β=105.18(3)°，V=3.6985(13)nm3，Dc=1.745g·cm-3，Z=8，R=0.0484，wR=0.0852(I>2σ(I))。来自4个不同btc3-配体的4个羧基连接相邻的3个钴(Ⅱ)离子形成了1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1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: 山西省自然科学基金(No.2013011011-6)、太原科技大学研究团队资助项目。 |
| Abstract: Acoordination 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/a with a=1.7744(4) nm, b=1.1423(2) nm, c=1.8908(4) nm, β=105.18(3)°, V=3.6985(13) nm3, Dc=1.745 g·cm-3, Z=8, R=0.0484 and wR=0.0852(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 3Dframework. 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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| 高竹青,李红晋,顾金忠.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[J].无机化学学报,2014,30(6):1421-1426. |
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