壳聚糖铁(Ⅲ)配合物的合成及结构表征

摘要/Abstract

摘要： 【研究目的】为了利用高分子壳聚糖的生物活性，寻找理想的补铁制品，在均相反应条件下，以壳聚糖为载体与Fe3+离子配位，合成了壳聚糖铁(Ⅲ)配合物；【方法】用元素分析、UV光谱和IR光谱等研究了配合物的组成与性质，并优化了配合物的合成条件；【结果】壳聚糖对Fe3+的吸附具有较好的动力学性能，随着温度的升高，反应达到平衡的时间缩短；壳聚糖对Fe3+离子吸附等温线符合Langmuir吸附等温线方程，在室温下，pH为1.8时吸附8h的饱和吸附量Qmax = 62.89mg/g，b =4.969J/mg；壳聚糖铁(Ⅲ)配合物的UV光谱中出现了新的吸收峰，IR光谱分析显示，形成配合物后，壳聚糖的部分特征吸收峰也发生了一定的位移，光谱分析的结果表明壳聚糖与Fe3+离子之间可能发生了配位反应；壳聚糖中主要是-NH2和-OH参与了与金属离子的配位，部分乙酰氨基(-CONH2)也可能参与了配位。【结论】实验结果有望使壳聚糖铁(Ⅲ)配合物成为一种具有较好生物利用度的营养型补铁剂，使壳聚糖铁(Ⅲ)配合物成为具有多功能的保健药品。

关键词: 甜椒幼苗, 甜椒幼苗, 水分胁迫, 复水, 生理生化特性

Abstract: 【OBJECTIVE】In order to enhance biologic activity of chitosan and to look for suitable supplement ferric dosage, chitosan-ferric complex was synthesized through the homogeneous reactions; 【METHOD】Their composition and structures were characterized by elementary analysis, UV spectra and IR spectra; 【RESULTS】It was found that the coordination was realized through binding of in chitosan with Fe3+ in the chitosan-ferric complex. The optimizing coordination condition of chitosan-ferric complex that the reaction was carried out under stirring at 25℃ and pH=1.8 for 8h. The adsorption isotherm and adsorption kinetics of chitosan for ferric ions were investigated and results were satisfied with the Langmuir-single-molecule-layer adsorption mechanism. The apparent adsorption velocity constant b is 4.969J/mg and the saturated adsorption capacity Q is 62.89mg/g at 298.15K. The UV spectra of the chitosan-ferric complex showed that new absorptive peaks appeared and the IR spectra of the chitosan-ferric complex showed that part of the characteristic adsorptive peaks of chitosan displaced. The spectral analysis indicated that the complex reactions took place mainly between the amino group(-NH2), the hydroxyl group(-OH), part of the acetylamino(-CONH2) of chitosan and Fe3+; 【CONCLUSION】It was hopeful to make pharmaceutical which people have chitosan-ferric complex to taken full advantage of from it, and chitosan-ferric complex become a kind of popular medicines with health protection.

中图分类号:

O 647

孙兰萍,许晖,赵大庆,张斌. 壳聚糖铁(Ⅲ)配合物的合成及结构表征[J]. 中国农学通报, 2007, 23(1): 53-053.

Sun Lanping, Xu Hui, Zhao Daqing, Zhang bin. Synthesis and Characterization of Chitosan-Ferric Complex[J]. Chinese Agricultural Science Bulletin, 2007, 23(1): 53-053.

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