| 基于含双吡唑的四羧酸配体构筑的Fe(Ⅱ)/Co(Ⅱ)同构配合物的合成、晶体结构及磁性质 |
| Synthesis, Structural and Magnetic Characterization of Fe(Ⅱ)/Co(Ⅱ)Isomorphous Complexes Based on a Dipyrazole-Containing Tetracarboxylate Ligand |
|
| 摘要: 本文报道了2种二维同构配位聚合物{（NH2（CH3）2）2[M（L）]}n（M=Fe （1）、Co （2），H4L=1，1'-（1，4-苯基双（亚甲基））双（1H-吡唑-3，5-二羧酸））的合成、晶体结构和磁性。X射线单晶衍射结构分析表明，2种配合物属于相同的单斜晶系P21/n空间群，中心金属离子M（Ⅱ）是六配位的八面体构型。该配合物的特点是配离子带有2个负电荷，溶剂DMF分解形成的二甲基胺离子作为阳离子而使配合物保持电中性。在聚合物中，每个配体通过吡唑环上的N、O原子和该吡唑环上的单齿O原子桥联2个金属离子，形成···M-L-M-L···一维链，此一维链相交形成包含M4L4单元的无限二维网络结构。磁性研究表明，配合物1和2具有反铁磁性。 |
| 关键词: 晶体结构 1，1'-(1，4-苯基双(亚甲基))双(1H-吡唑-3，5-二羧酸) 铁(Ⅱ)配合物 钴(Ⅱ)配合物 磁性 配位聚合物 |
| 基金项目: 山西省高等学校科技创新项目（No.2020L0598）和晋中学院博士启动基金资助 |
| Abstract: We herein report the synthetic, structural, and magnetic studies on two 2D isomorphous complexes, {(NH2(CH3)2)2[M(L)]}n (M=Fe (1), Co (2), H4L=1, 1'-(1, 4-phenylenebis(methylene))bis(1H-pyrazole-3, 5-dicarboxylic acid)). From single crystal X-ray crystallography, it is found that the complexes crystallized in the same space group monoclinic P21/n and have six-coordinate octahedron structures. The framework features anionic having a-2 charge, and the electroneutrality is achieved by the incorporation of the protonated dimethylamine by hydrolysis of DMF in the voids of the net. In the two polymers, each ligand bridges two metal(Ⅱ) ions through cheating N, O atoms of the pyrazole ring and monodentate O atoms of the same pyrazole ring, forming ···M-L-M-L··· chains and the 1D chains intersect to form an infinite 2D network which contains nearly square M4L4 units. Magnetic susceptibility measurements indicate the presence of antiferromagnetic properties in complexes 1 and 2. |
| Keywords: crystal structure 1, 1'-(1, 4-phenylenebis(methylene))bis(1H-pyrazole-3, 5-dicarboxylic acid Fe(Ⅱ) complex Co(Ⅱ) complex magnetic properties coordination polymers |
| 投稿时间：2022-03-14 修订日期：2022-09-16 |
| 摘要点击次数: 3637 |
| 全文下载次数: 978 |
| 李芬芳,何婧.基于含双吡唑的四羧酸配体构筑的Fe(Ⅱ)/Co(Ⅱ)同构配合物的合成、晶体结构及磁性质[J].无机化学学报,2022,38(11):2259-2266. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
