两个包含联苯三羧酸配体的铜(II)和锰(II)配合物的合成、晶体结构及磁性质 |
Syntheses, Crystal Structures and Magnetic Properties of Two Copper(II) and Manganese(II) Coordination Compounds Constructed from Biphenyl Tricarboxylic Acid |
|
摘要: 采用水热方法,用联苯三羧酸配体(H3dppa)和4,4'-联吡啶(4,4'-bipy)分别与CuCl2·2H2O和MnCl2·4H2O反应,合成了一个具有零维双核铜结构的配合物[Cu2(Hdppa)2(4,4'-bipy)(H2O)4]·4,4'-bipy·6H2O(1)和一个基于双螺旋链单元的三维配位聚合物{[Mn3(μ5-dppa)2(4,4'-bipy)(H2O)2]·4H2O}n(2),并对其结构和磁性质进行了研究。结构分析结果表明2个配合物分别属于三斜和单斜晶系,P1和C2/c空间群。配合物1具有零维双核铜结构,而且这些双核铜单元通过O-H…O/N氢键作用进一步形成了三维超分子框架。而配合物2中存在一个双螺旋锰链单元,这些锰链单元又通过配体进一步连接成了三维结构。研究表明,配合物2中相邻锰离子间存在反铁磁相互作用。 |
关键词: 配位聚合物 氢键 三羧酸配体 磁性 |
基金项目: 广东省高等职业院校珠江学者岗位计划资助项目(2015),广东省自然科学基金(No.2016A030313761),广东轻院珠江学者人才类项目(No.RC2015-001),生物无机与合成化学教育部重点实验室开放基金(2016),广东省高校创新团队项目(No.2017GKCXTD001)国家自然科学基金(No.21701032)和佛山市科技计划项目(No.2017AB003922)资助。 |
Abstract: Zero dimensional dinuclear copper(Ⅱ) coordination compound and 3D manganese(Ⅱ) coordination polymer, namely[Cu2(Hdppa)2(4,4'-bipy)(H2O)4]·4,4'-bipy·6H2O (1) and {[Mn3(μ5-dppa)2(4,4'-bipy)(H2O)2]·4H2O}n (2), have been constructed hydrothermally using H3dppa, 4,4'-bipy (H3dppa=5-(3,4-dicarboxylphenyl)picolinic acid, 4,4'-bipy=4,4'-bipyridine), and copper or manganese chlorides. Single-crystal X-ray diffraction analyses revealed that two compounds crystallize in the triclinic or monoclinic system, space group P1 or C2/c. In compound 1, one 4,4'-bipy ligand bridges neighboring Cu(Ⅱ) ions to form a discrete dinuclear copper(Ⅱ) structure. These Cu2 units are assembled to a 3D supramolecular framework through O-H…O/N hydrogen bond. In compound 2, neighboring Mn(Ⅱ) ions are bridged by the carboxylate groups of μ5-dppa3- ligands, producing a double-helix Mn(Ⅱ) chain subunit. The adjacent double-helix chains subunits are further linked by the dppa3- blocks and 4,4'-bipy ligands into a 3D framework. Magnetic studies for compound 2 demonstrate an antiferromagnetic coupling between the adjacent Mn(Ⅱ) centers. |
Keywords: coordination polymer hydrogen bonding tricarboxylic acid magnetic properties |
投稿时间:2018-01-02 修订日期:2018-03-24 |
摘要点击次数: 2460 |
全文下载次数: 1192 |
黎彧,邹训重,顾金忠,成晓玲.两个包含联苯三羧酸配体的铜(II)和锰(II)配合物的合成、晶体结构及磁性质[J].无机化学学报,2018,34(6):1159-1165. |
查看全文 查看/发表评论 下载PDF阅读器 |
Support information: |
|
|
|