【作者】 宋艳虹；

【导师】 赵建社；

【作者基本信息】 西北大学 ， 无机化学， 2007， 硕士

【摘要】 席夫碱是一类非常重要的配体，它的-C=N-双键官能团使其具有易配位、易成环等特点。迄今国内外化学工作者不断开展此领域的工作，合成了各类席夫碱及其金属配合物，并研究和开发了多方面的用途。其中，含有N、O杂原子的多齿螯合配体对过渡金属离子有较强的配位能力，过渡金属席夫碱配合物因其多样的配位方式被人们越来越深入地研究，这类配合物包括单核、双核以及聚合物，它们在光谱、催化、新材料、药物、生物机理模拟等领域都有广泛的应用前景，日益引起了人们的注意，因此设计合成这种席夫碱配体及其过渡金属配合物具有重要的化学与生物学意义。本论文选取水杨醛、吡啶醛两类不对称席夫碱配体，合成了其过渡金属配合物，以H₂O₂-Vc为体系，测定了部分水杨醛类席夫碱配合物的催化氧化性能。论文主要完成了以下工作：1．利用含有不同取代基团的水杨醛与2-胺甲基呋喃和苄胺合成了14个不对称席夫碱配体，并合成了其与铜、钴、镍、锌、锰和铁的配合物，对它们进行了红外和元素分析，对部分配合物进行X-射线单晶结构测定和热分析。2．利用相应的吡啶醛类与2-胺甲基呋喃和苄胺合成了4个不对称席夫碱配体，并合成了它们的后过渡金属氯化物、高氯酸盐的配合物，对它们进行了红外、紫外和元素分析，对部分配合物进行X-射线单晶结构测定和热分析。3．选择了三个系列的24个水杨醛类席夫碱配合物作为催化剂，对H₂O₂-Vc体系进行了催化氧化实验，发现这些配合物均具有一定的催化氧化作用。同时，对实验结果从金属离子、结构、取代基团等方面进行比较和分析，其中双核Cu（Ⅱ）的配合物催化性能较好。更多还原

【Abstract】 Schiff base is a kind of very important ligand, and its functional group of -C=N-double bond is inclined to coordinate with metals and to be ring formation. Up to now, researchers in the world have synthesized and charactered kinds of Schiff bases, their metal complexes and exploited uses in many fields. Among them, the multidentate chelating ligands containing nitrogen and oxygen heteroatoms have the better ligand capability with transition metal atoms, and transition metal complexes of Schiff base have been studied in great details more and more, for their various coordinated feature. This kind of complexes, containing mononuclear, binuclear and polynuclear, are given more attention because their special useful for spectroscopic properties, catalysis properties, new material, medicine, simulating biology mechanis and so on. Therefore, design and synthesize some new Schiff base ligands and their complexes of transition metals have much signification in chemistry and biology.Thus, we synthesize salicylaldehyde and pyridinecarboxaldehyde Schiff base ligands and their transition metal complexes, which are used as oxidizing catalysts in H₂O₂-Vc system. Our main works are as following:1. Fourteen asymmetrical Schiff base ligands of salicylaldehyde containing different substituent groups and their copper（II）, cobalt（II）, nickel（II）, zinc（II）, manganese（II） and iron（III） complexes were synthesized, and characterized by elemental analysis, IR spectroscopy, also some of them were characterized by thermal analysis and single crystal X-ray diffraction.2. Four asymmetric pyridinecarboxaldehyde Schiff base ligands and their complexes with transition metal salts were synthesized and characterized by elemental analysis, IR and UV-vis spectroscopies, also some of them were characterized by thermal analysis and single crystal X-ray diffraction.3. We choose twenty-four complexes that derived from asymmetrical salicylaldehyde Schiff base ligands mentioned above as oxidizing catalysts in H₂O₂-Vc system. Investigation indicates that all of them reveal certain catalytic-oxidizing capability. We analysed and compared with the experimental result from metal ion, structure and substituent groups, founding that the catalytic capability of binuclear complex of Cu（II） is better than others.更多还原