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以甲壳低聚糖与FeCl3反应络合成甲壳低聚糖铁(Ⅲ),以甲壳低聚糖与亚硒酸反应络合成甲壳低聚糖硒,对2种络合物的稳定性及紫外、红外光谱进行检测。甲壳低聚糖铁(Ⅲ)水溶液中不存在游离铁(Ⅲ),表明铁(Ⅲ)与甲壳低聚糖形成了稳定的配合物,在pH值为3～11的范围内不水解,无沉淀产生;甲壳低聚糖硒水溶液中不存在游离的硒离子,表明硒元素与甲壳低聚糖也形成了稳定的配合物。红外光谱扫描也表明甲壳低聚糖与铁、硒络合的特征峰变化。研究结果说明甲壳低聚糖与铁(Ⅲ)或硒能形成稳定的配合物。经红外光谱分析其配位的基团主要是氨基,羟基也有一定的配位能力,但是强度低于氨基。以上实验结果有望使甲壳低聚糖铁(Ⅲ)配合物成为一种具有较好生物利用度的营养型补铁剂,使甲壳低聚糖硒配合物成为具有多功能的保健药品。
The chitooligosaccharides iron (Ⅲ) was synthesized through the reaction of chitooligosaccharides and FeCl3, and the chitooligosaccharides selenium was synthesized by the reaction between chitooligosaccharides and selenite. The stability of the two complexes and the UV , Infrared spectroscopy detection. The absence of free iron (Ⅲ) in chitooligosaccharides iron (Ⅲ) aqueous solution shows that iron (Ⅲ) forms a stable complex with chitooligosaccharides and does not hydrolyze in the pH range of 3 ~ 11 without precipitation Chitooligosaccharides in selenium aqueous solution does not exist free selenium ions, indicating that selenium and chitooligosaccharides also formed a stable complex. Infrared spectral scanning also showed that chitooligosaccharides and iron, selenium complexes peak changes. The results show that chitooligosaccharides and iron (Ⅲ) or selenium can form a stable complex. The infrared spectrum analysis of its coordination group is mainly amino, hydroxyl also has some coordination ability, but lower than the intensity of amino. The above experimental results are expected to make chitooligosaccharides iron (Ⅲ) complexes become a kind of nutritional iron supplementation with good bioavailability, the chitooligosaccharides selenium complexes become multi-functional health care products.