| 配位聚合物[Fe(HL)(H2O)]n的合成、晶体结构及磁性质 |
| Synthesis, Crystal Structure and Magnetic Property of a Coordination Polymer[Fe(HL)(H2O)]n |
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| 摘要: 通过水热方法,采用H3L(H3L=2-(4-carboxypyridin-3-yl)terephthalic acid)与FeSO4·7H2O反应,合成了一个具有二维结构的配位聚合物[Fe(HL)(H2O)]n (1),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正交晶系,Pnna空间群,a=1.45465(11) nm,b=2.47423(15) nm,c=0.73565(4) nm,V=2.6477(3) nm3,Dc=1.802 g·cm-3,Z=8,R=0.0468,wR=0.1256(I>2σ(I))。HL2-配体交替连接相邻的铁(Ⅱ)离子形成了一维链结构单元,这些链又通过配体与铁(Ⅱ)离子的配位作用形成了二维层。最后这些层通过氢键作用形成了一个复杂的三维超分子框架。拓扑分析表明,配合物1具有一个双节4,4-连接的拓扑网络结构,其拓扑符号为(43.62.8)。研究表明,该聚合物中相邻铁(Ⅱ)离子之间存在反铁磁相互作用。 |
| 关键词: 配位聚合物 铁(Ⅱ)配合物 磁性 |
| 基金项目: 青海省应用基础研究计划项目(No.2015-ZJ-738)资助 |
| Abstract: A coordination polymer, namely[Fe(HL)(H2O)]n (1), has been synthesized hydrothermally using H3L (H3L=2-(4-carboxypyridin-3-yl)terephthalic acid) and FeSO4·7H2O. The compound crystallizes in the orthorhombic system, space group Pnna with a=1.45465(11) nm, b=2.47423(15) nm, c=0.73565(4) nm, V=2.6477(3) nm3, Dc=1.802 g·cm-3, Z=8, R=0.0468 and wR=0.1256(I>2σ(I)). The HL2- moieties alternately link the adjacent Fe(Ⅱ) centers to form a 1D chain motif. These 1D motifs are arranged into a 2D sheet structure by further coordination interactions of the HL2- ligands to Fe(Ⅱ) ions. Furthermore, the neighboring metal-organic sheets in 1 are assembled, through the O-H…O hydrogen bonds, into a complex 3D supramolecular framework. For topological analysis, the 2D metal-organic network in 1 is a binodal 4,4-connected layer, which is defined by the point symbol of (43.62.8). Magnetic studies for compound 1 show a weak antiferromagnetic coupling between the nearest Fe(Ⅱ) centers, with g=2.04 and J=-2.57 cm-1. |
| Keywords: coordination polymer iron(Ⅱ) complex magnetic properties |
| 投稿时间：2015-11-21 修订日期：2016-04-02 |
| 摘要点击次数: 2207 |
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| 赵素琴,顾金忠.配位聚合物[Fe(HL)(H2O)]n的合成、晶体结构及磁性质[J].无机化学学报,2016,32(5):853-858. |
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