优秀毕业论文（设计）_吡啶三唑Co(II)配合物的合成、晶体结构及磁性质研究.docx

毕业论文（2016 届）吡啶三唑钴（II）配合物的合成、晶体结构及磁性质的研究学院化学化工学院专业化学工程与工艺年级2012 级学生学号12012242444 学生姓名李娜指导教师刘翔宇日期2016年 3 月 22日摘要本文选取过渡金属Co(Ⅱ)为中心配位原子，以3-苯基-5-(4-吡啶基)-1,2,4-三唑(4-Hppt)为配体，通过引入间苯二甲酸(H2ip)为辅助配体采用水热法构筑结构新颖的配合物[Co(4- Hppt)2(ip)](1)。同时，利用红外光谱仪、X-射线单晶衍射仪及X-射线粉末衍射仪对其组成进行表征，并解析了配合物的晶体结构，结果表明，配合物1是三斜晶系，空间群为P-1，不对称晶胞单元包含了一个晶体学独立的Co(II)中心，两个4-Hppt，一个H2ip配体分子，其中，Co(II)中心为六配位模式，相邻的两个Co(II)离子之间是通过两个间苯二甲酸配体桥连的，形成一个扭曲的八面体结构，三个间苯二甲酸上的四个羧酸氧原子分别占据于赤道平面，两个4-Hppt上的两个吡啶氮原子分别占据于两个顶点位置。另外，磁性研究表明，配合物1中两个Co(Ⅱ)中心之间存在反铁磁耦合。关键词：配位聚合物晶体结构磁性研究AbstractThis paper selects the transition metal Co (II) as the central atom, with 3-phenyl-5 - (4-pyridyl) - 1,2,4-triazole 4-Hppt as ligand, by introducing H2ip as the secondary ligand ,the newly structure compound [Co (4 - HptT) 2 (ip)] (1) have been obtained with hydrothermal method. At the same time, its’ composition and crystal structure was characterized by infrared spectroscopy, X-ray single crystal diffractionand X-ray powder diffraction, the analytical results show that compound 1 crystallizes in the triclinic system with space group P-1, the asymmetric unit cell contains a crystallographic independent Co (II) center. Two 4-Hppt, a H2ip ligand, Among them, Co (II) center is six coordinated mode, two adjacent Co (II) ions through two benzene two formic acid bridging ligand, forming a distorted structure of eight, three between four carboxyl oxygen atoms two formic acid on the equatorial plane were occupied in two, two pyridine nitrogen atoms on the 4-Hppt were occupied in two vertex position. In addition, magnetic studies show that there are antiferromagnetic coupling between two Co (II) centers in compound 1.key word:Coordination polymerCrystal structureMagnetic research目录1.绪论11.1 前言11.2 配位聚合物的发展11.3 磁性配位聚合物应用21.4 构筑分子基磁体的有机配体31.4.1 含氮杂环类配体31.4.2 含羧酸类配体31.5 课题意义与研究内容41.5.1 课题意义41.5.2 研究内容52.配合物[Co(4-Hppt)2(ip)]的合成、晶体结构及磁性研究62.1 实验试剂和实验仪器62.1.1 实验试剂62.1.2 实验仪器62.2 配体4-Hppt的制备62.3 配合物[Co(4-Hppt)2(ip)](1)的合成72.4 配合物[Co(4-Hppt)2(ip)](1)的晶体结