Synthesis And Structure Of Complexes With Multifunctional Sulfur-containing Mixed Ligands

More and more enthusiastic people research coordination polymers, because their diverse constructions and the potential applications, for example, the properties of optical, electricity and magnetism, catalysis, gas storage, ion exchange and molecular recognition, etc. In the process of the synthesis of these coordination polymers, we use crystal engineering science and topolopy theory and some simple and feasible ways to construct various kinds of metal-organic frameworks (MOFs) by replacement of the bonds with organic bridges. In this paper, we designed a variety of synthetic routes to construct different structural coordination polymers by assembling double carboxyl ligand and nitrogen-containing ligands with different metal ion. In those routes, we led in some auxiliary ligands with different lengths of bipyridine, such as 4,4’-bipyridine (bpy), 1,2-bis(4-pyridyl)ethylene (bpe) and 1,3-bis(4-pyridyl)propane (bpp). This thesis is divided into four chapters:In Chapter 1, the study of coordination chemistry, including the development situation, synthetic method, property and function, and the effect of crystal engineer and topology in the research of complex, as well as the significance of this work.In Chapter 2, one cadmium and two zinc complexes were synthesized with 2,2-Dimethylsuccinic acid through hydrothermal reactions with the auxiliary ligands of bpp and bpe. Two of they (one cadmium and one zinc complexes) show us the diversity of 3D structure. As the product of contrast experiment, the third complex shows a simple 2D topology.In Chapter 3,2-(2-Cyanophenylthio)berzoic Acid is the primary ligand and hydrolyzed to 2-(2-carboxyphenyl)sulfanylbenzoic acid (dpsa), we obtained four complexes of different structures with different lengths of bipyridine like bpy, bpe and bpp. Dpsa shows different chelating and bidentate-bridge coordination model, while bipyridine compounds has played a unique role. Meanwhile it proved that the mixed ligands can create coordination polymers with more abundant structures.In Chapter 4, it described a case of quad-core nickel complex based on 2-Amino-5-mercapto-1,3,4-thiadiazole (Hamtd). In the process of synthesis, we led in alkali and obtained the complex in relatively mild condition. The quad-core nickel unit is a zero-dimensional polymer, which six amtd parcel inside four nickel ions. As a new structure, there are still a lot of worthy of further study.Finally, brief conclusions on these works and an outlook are provided.