优秀毕业论文（设计）_辅助羧酸配体调控的金属Cu(II)配合物的结构及磁性研究.docx

毕业论文（2016届）辅助羧酸配体调控的金属Cu(II)配合物的结构及磁性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 12012242488 学生姓名张誉琼指导教师刘翔宇年月日摘要本论文以探索具有良好磁性能的金属配合物的合成策略为目的，选择具有单电子的金属铜离子作为顺磁中心，以N3-苯甲酰基吡啶-2-甲酰胺腙(Hbpad)为配体，同时分别引入具有刚性结构的邻苯二甲酸(Hp)和间苯二甲酸(Hip)作为辅助配体合成了两例未见文献报道的配合物：[Cu2(bpad)2(Hp)2]n(1)和[Cu2(bpad)2(Hip)2]n(2)，并通过元素分析、红外光谱分析、X-射线单晶衍射、超导量子干涉磁性测量等手段表征了配合物的组份，结构及磁性。主要结论和内容如下：配合物1属单斜晶系，空间群为P-21/c，五配位的Cu(II)中心采用四方锥几何构型，两个中心Cu(II)离子之间具有反铁磁耦合作用，羧基氧提供桥连。配合物2属三斜晶系，空间群为P-1，五配位的Cu(II)中心采用三角双锥几何构型，两个中心Cu(II)离子之间具有铁磁耦合作用，氨基甲酰氧提供桥连。不同辅助羧酸配体的调控使得互为同分异构体的配合物1和2具有截然不同的结构和磁性。关键词：双核Cu(II)吡啶酰腙刚性芳香羧酸磁性配合物AbstractThis paper is aimed to explore an effective synthetic strategy of coordination polymers with good magnetic properties. We choose Cu(II) as the paramagnetic center, N3-benzoylpyridine-2-carboxamidrazonato (Hbpad) as the bridging ligand. Together with the introduction of phthalic acid(Hp) and isophthalic acid (Hip)as the secondary building unit respectively, two new compounds: [Cu2(bpad)2(Hp)2]n(1) and [Cu2(bpad)2(Hip)2]n(2)have been obtained. The structure and magnetic properties of the compounds have been systematically characterized by elemental analysis, infrared spectrathe, single-crystal X-ray experiment and superconducting quantum interference experiment. Results are as follows:Compound 1 crystallizes in the monoclinic system with space group P21/c.The penta-coordinated Cu(II) ion adopts a square pyramidal geometry. Compound 2 crystallizes in the triclinic system with space group P-1. The penta-coordinated Cu(II) ion adopts a trigonal bipyramid geometry. The dinuclear Cu(II) units are bridged by carboxylate oxygen, performing antiferromagnetic interaction for 1 whiledinuclear Cu(II) units are bridged by carbamoyl oxygen atoms, performing ferromagnetic interaction for 2.Based on the regulation of different secondary building units, the two isomeric compounds perform differently in structure and magnetic properties.Key Words: dinuclear Cu(II)pyridine acylhydrazonerigid aromatic carboxylic a