双吡啶酰胺-金属超分子配合物的合成机理探究

摘要

Based on 2,6-diaminopyridineand pyrazine-2-carboxylic and multifunctional bispyridylcarboxamide ligands,namely,2,6-bis(pyrazine-2-carboxamido)pyridine(L)were designed and synthesized in this paper. Ligands are subfamily of bis(pyridyl),and has big framework,originated from the incorporation two amide groups of 2,6-diaminopyridine into the backbones of aromatic arboxylic acids. Using ligands L to reaction with transition metals,we synthesized three metal coordination complexes,namely,[Ni4(LO)4],[Cu4(LO)4]·H2O,{[Cu4(LO)4] [Cu4(LO)4]}·2DMF. The synthesized ligands and the related complexes were characterized by IR,elemental analysis,MS,PXRD and X-ray single crystallography. Then we explored ligands L transform into LO reaction mechanism,and presented metal ion coordination synergic oxidation mechanism.%以2，6-二氨基吡啶和吡嗪羧酸为原料，设计合成了双吡啶酰胺多功能桥联配体2，6-双吡嗪酰胺吡啶（L），它是通过把氨基官能团连接到芳香羧酸骨架上的、大骨架酰胺类桥联配体，用配体与过渡金属离子在溶剂热下反应合成了[Ni4（LO）4]，[Cu4（LO）4]∙H2O，｛[Cu4（LO）4][Cu4（LO）4]｝∙2DMF 3个双吡啶酰胺-金属超分子配合物。通过IR、EA、MS、XRD对合成的配合物进行了表征和性能研究。研究了配体由L转变成配体LO反应机理，提出了金属离子配位协助的氧化机理。