天津工业大学学报2017，Vol.36Issue(2)：25-30,6.DOI:10.3969/j.issn.1671-024x.2017.02.005
壳寡糖铁(Ⅲ)配位产物的合成与表征
Synthesis and characterization of chitooligosaccharides-Fe(Ⅲ) complex
摘要
Abstract
In order to investigate the coordination structure and synthesis conditions of chitooligosaccharide- Fe (Ⅲ), ferric trichloride and self-made chitooligosaccharide whose viscosity-average molecular weight was less than 1000 were used to synthesize chitooligosaccharide-Fe (Ⅲ) complex. The concentration of Fe3+before and after reaction was measured by vis-spectrophotometer, and the effects of pH, temperature and reaction time on the complexation reaction were explored. The structure of chitooligosaccharide-Fe (Ⅲ) complex was characterized by IR, visible ultraviolet (UV), thermogravimetric analysis and differential scanning calorimetry (TGA-DSC) and elemental analysis (EA). The experimental results showed that the amount of Fe3+involved in coordination reaction increased with augment of pH, and when the pH of solution was beyond 3.5, the coordination reaction could not be carried out due to Fe3+forming precipitate. With the increase of the reaction time and temperature, Fe3+coordination quantity increased until the coordination reaction gradually tended to be balanced. Considering the actual production cycle and energy consumption, the optimum reaction time and temperature were 60 min and 40 ℃, respectively. Relative to the thermal stability of chitooligosaccharide , the thermal stability of complexes improved. The ratio of Fe (Ⅲ) to chitooligosaccharide was 3:1, therefore the structural fomula of complex was determined.关键词
壳寡糖铁(Ⅲ)配合物/pH值影响/Fe3+浓度/表征/配位比Key words
chitooligosaccharide-Fe(Ⅲ) complex/effect of pH/concentration of Fe3+/characterization/complex ratio分类
化学化工引用本文复制引用
徐进云,贾辉,杨俊玲,齐东来..壳寡糖铁(Ⅲ)配位产物的合成与表征[J].天津工业大学学报,2017,36(2):25-30,6.基金项目
国家自然科学基金资助项目(21202117) （21202117）
