作　　者： ; ; ; ; ;

机构地区： 黄冈师范学院化学系

出　　处： 《分析化学》 2003年第5期590-593,共4页

摘　　要： 基于热分析和变温红外光谱,借助于二维相关分析法,揭示了β-CD在空气中的热变行为.22-150℃,脱出吸附水和结晶水;150～260℃,伯羟基被空气中的氧气氧化为醛;当温度高于260℃时,β-CD发生了强烈的氧化反应,糖环和大环均被破坏,最终生成CO2和H2O。该法为环糊精热稳定性机理的研究提供了一个有价值的理论依据。 Based on thermal analysis and variable-temperature infrared spectra, with the help of 2 dimensional correlation analysis, the changes of β-cyclodextrin during heating up were discovered. At 22 - 150℃ , the water of absorption and crystallization was desorbed; 150 - 260℃ , the 1° hydroxyl group was oxidized to carbonyl group by oxygen; over 2601, β-cyclodextrin was oxidized intensely, the glyc ring and big ring were destructed, and ultimately CO2 and H2O were engendered. This method offers a valuable theory gist to the study of thermal stability mechanism of β-cyclodextrin.

关 键 词： 环糊精 变温红外光谱 二维相关分析 热分析 氧化 醛 伯羟基

领　　域： [理学] [理学] [理学] [理学]