基于羧酸和吡啶配合物的合成及性质研究

发布时间：2018-01-05 02:14

本文关键词：基于羧酸和吡啶配合物的合成及性质研究　出处：《天津理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：配位化合物作为一种功能材料,因其新颖的结构和潜在的应用价值引起了广泛关注。目前已有大量具有出色拓扑结构和特定性质(磁性、吸附性、光学性能)的配合物被不断报道。配位化合物的性质主要由其结构决定,所以配体的选择和金属的配位构型是首要考虑的问题。本文利用溶剂热合成法成功构筑了11例配位化合物,系统探究了它们的配位模式和拓扑结构,并选取部分配合物进行磁性研究。具体内容如下:1、以4-吡啶-4基苯甲酸、4,4’-联苯二甲酸、2,2’-联吡啶-4,4’-二甲酸、苯基丁二酸等作为主配体,过渡金属和稀土金属作为自旋载体,合成了6个配位化合物(1-6)。其中1为具有弱铁磁性的单链磁体[Co_8(OMe)_6(HCO_2)_4(L~1)_6]_n,(L~1=4-(pyridin-4-yl)benz-olate)。该配合物基于[Co_8(OMe)_6(HCO_2)_4(isonic)6·H2O]n(1’)的Co~Ⅱ-甲酸磁性链,成功地替换了隔离配体,是目前罕见的两个具有相同构筑单元的单链磁体。通过对比两种配合物,发现随着配体空间构型的增大,链间距离增大,链间耦合减弱,有利于改善单链磁体的磁学性质。2、以4-苄基吡啶及其衍生物作为主配体,硫氰酸钠或叠氮钠作为混配体,合成了5个以六配位的Fe为中心离子的配位化合物(7-11),并对7-10进行了磁性研究。其中7、9、10展现出单个Fe~Ⅱ的磁性行为,8表现出极弱的铁磁性。
[Abstract]:A kind of functional material as coordination compounds, because of their novel structures and potential applications has attracted wide attention. There are many excellent topological structure and special properties (magnetic, adsorption, optical properties of the complexes have been reported). The nature of coordination compounds is mainly determined by its structure, so the choice of ligand and metal coordination geometry is the primary consideration. This paper use spincrossover successfully constructed 11 cases of coordination compounds, system and explore their coordination mode and topology, and select the part of the magnetic complexes. The contents are as follows: 1, with -4 based 4- pyridine benzoic acid. 4,4 '- biphenyl two formic acid, 2,2' - bipyridine -4,4 '- two formic acid, phenyl succinic acid as the main ligand, transition metal and rare earth metal as a spin carrier, 6 coordination compounds were synthesized (1-6). 1 of them have weak ferromagnetism The single chain magnets [Co_8 (OMe) _6 (HCO_2) _4 (L~1) _6]_n (L~1=4- (pyridin-4-yl) benz-olate). The complexes based on [Co_8 (OMe) _6 (HCO_2) _4 (isonic) 6 - H2O]n (1 ") Co~ II - acid magnetic chain, successfully replace the isolated ligand, is two is rare with the same build single chain magnets unit. By comparing the two kinds of complexes, found that with increasing the spatial configuration of the ligand, increasing distance between chain, chain coupling weakened,.2 is conducive to improve the magnetic properties of single chain magnets, 4- benzyl pyridine and its derivatives as the main ligand, sodium thiocyanate or stack nitrogen sodium as mixed ligands, 5 to six of the Fe coordination center ion coordination compounds were synthesized on 7-10 (7-11), and magnetic properties were also investigated. The 7,9,10 showed the magnetic behavior of single Fe~ II, 8 showed very weak ferromagnetism.

【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：O641.4

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