Formation of Cu(Ⅱ) with Chitosan and the Study of GFC Spectra Study on the Molecular Weight Distribution of Oligosaccharides by Oxidizing Degradation
CHEN Yi-ping1, HAO Hong-yuan1, ZHANG Qi1, 2*, GE Qing-kai1, WANG Ping-hong1
1. Hainan Provincial Key Lab of Fine Chemicals, Hainan University, Hainan 570228, China 2. State Key Lab of Applied Organic Chemistry Lanzhou University, Lanzhou 730030, China
Abstract：Complexes of chitosan with Cu(Ⅱ) were prepared by adding Cu(OAc)2·H2O to chitosan solution. IR, UV, elemental analysis, and thermal weight analysis were used to characterize the complex. The results showed that there were coordinate bands formed. H2O2 was used to degrade chitosan-Cu(Ⅱ) complex, and the molecular distribution of degraded products was investigated. The result suggested that the chitosan could be degraded rapidly, the degradation started from higher molecular weight range, and the molecular weight distribution of oligosaccharides was much more narrow than that of degraded products with usual methods, such as hydrolysis acidic and oxidizing conditions. The index of molecular weight distribution changed with the average degradability. When exceeding 10 oligosaccharides, the smaller the DP, the smaller the index.
陈祎平1，郝红元1，张 岐1, 2*，葛庆凯1，王平红1 . 壳聚糖铜(Ⅱ)配位与氧化控制降解寡糖的GFC色谱研究[J]. 光谱学与光谱分析, 2005, 25(06): 992-995.
CHEN Yi-ping1, HAO Hong-yuan1, ZHANG Qi1, 2*, GE Qing-kai1, WANG Ping-hong1 . Formation of Cu(Ⅱ) with Chitosan and the Study of GFC Spectra Study on the Molecular Weight Distribution of Oligosaccharides by Oxidizing Degradation . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(06): 992-995.
