Oxygenation Of Cobalt (Ⅱ) Complexes With Schiff Bases Derived From Benzaldehyde Derivatives And Polyamine

Oxygen carrier is a kind of transition metal complexes which can absorb O₂ reversibly. The study on oxygen carrier has a potential applications in the field of dioxygen separation, industry, agriculture, medicine and biological field.A study of cobalt Schiff base which can absorb O₂ is an important aspect in the field of coordination chemistry and physical chemistry, for these compounds have the same properties of biologic oxygen carrier. Schiff base ligands and their complexes have a broad application in the field of analytical chemistry, stereochemistry, electrochemistry, spectroscopy, biochemistry, catalysis, material, nuclear chemistry et.al.Solid-state chemistry shows its advantages in coordination chemistry greatly. In this paper we synthesize seven new Schiff base ligands and related Schiff base cobalt complexes as oxygen carrier by solid-state reaction and study the oxygenation properties and comparison with those obtained from traditional liquid-state reaction. The contents of this work contain six parts:1. Prospect and application for Schiff base complex were discussed. Recent development of oxygenation of cobalt complexes was reviewed, such as the structure and properties of some typical oxygen carriers.2. N,N'-bis ( 4-hydroxyl-3-methoxy-benzyl ) diethylenetriamine and N,N'-bis(4-hydroxyl-benzyl)diethylenetriamine were synthesized by vanillin or p-hydroxy benzaldehyde and diethylenetriamine. Two new cobalt complexes were synthesized by solid-state reaction at room temperature. It was found that one mole of the complexes reacted with two moles of oxygen at room temperature. And the two oxygenated complexes were obtained and characterized by elemental analysis, IR spectra, 1HNMR, TG/DTA, MS, UV-vis,...