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The Preparation, Characterization and Ultraviolet Photodegradation of LNG-HP-beta-CD

文献类型： 外文期刊

作者： Wang Da-wei 1 ; Liu Qi 3 ; Liu Ming 2 ; Liu Xiao-hui 1 ;

作者机构： 1.Chinese Acad Agr Sci, Key Lab Weed & Rodent Biol & Management, Inst Plant Protect, Beijing 100193, Peoples R China

2.Chinese Acad Sci, State Key Lab Integrated Management Pest Insects, Inst Zool, Beijing 100101, Peoples R China

3.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China

4.Minist Agr, Key Lab Dryland Farmind & Water Saving Agr, Beijing 100081, Peoples R China

关键词： HP-beta-CD;LNG;Inclusion complex;UV absorption spectrum;Ulraviolet photodegradation

期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.589； 五年影响因子：0.504 ）

ISSN： 1000-0593

年卷期： 2011 年 31 卷 3 期

页码：

收录情况： SCI

摘要： The characteristics of levonorgestrel (LNG), low solubility and the quick degradation under ultraviolet, limited its study and application in rodent contraception. The inclusion complex of hydroxypropyl-beta-cyclodextrin (HP-beta-CD) with LNG was investigated in present study. The inclusion complex was prepared by solution method and characterized by ultraviolet absorption spectrum and infrared spectrum spectra. And the stability was evaluated by being exposed to ultraviolet. The authors' results showed that the accurate and simple method of quantitative determination for LNG was established by ultraviolet spectrum, the molar ratio of the complex was 1 : 1 calculated from the phase solubility diagram, the stability constant was 187. 3 L . moL(-1) at 25 degrees C, and the formation of the inclusion complex was validated by UV-Vis and Fourier transform infrared spectroscopy. Moreover, the degradation rate of the inclusion complex was less than 5%, which was slower than the LNG monomer. The present study indicated that HP-beta-CD could be formed inclusion complexes with LNG and the solubility, and stability were obviously enhanced.

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