α-山竹黄酮与几种金属离子的相互作用  

Interaction of α-Mangostin with Several Metal Ions

作　　者：张玉丽[1] 魏永锋[1] 

机构地区：[1]西北大学合成与天然功能分子化学教育部重点实验室陕西省电分析化学重点实验室西北大学化学系,西安710069

出　　处：《天然产物研究与开发》2009年第B05期106-108,共3页Natural Product Research and Development

摘　　要：用紫外吸收光谱法研究了α-山竹黄酮与几种金属离子（Al^3＋、Fe^3＋和Cu^2＋等）的相互作用。结果表明，仅．山竹黄酮与金属离子形成配合物前后其紫外吸收光谱有明显变化：其最大吸收波长均发生了红移，这可能是黄酮的羟基和羰基与金属离子配位引起的。另外，还采用紫外光谱法并应用摩尔比法确定配合物的化学计量配位比，并进一步计算出配合物的稳定常数和摩尔吸收系数。The interaction of α-mangostin with several metal ions,including Al^3＋ , Fe^3＋ and Cu^2＋ et al, were investigated by UV-vis spectroscopy. The results showed that the variation of UV-vis spectra of the complex was obvious, compared to the UV-vis spectra of α-mangostin. After the formation of the complexes of the α-mangostin with metal ions, there occurs a bathchromic shift of the maximum absorption wavelength for α-mangostin ,which may contribute to the coordination role of the hydroxyl group and keto group contained in α-mangostin. Through measurement of the UV-vis absorbance of the reaction solution containing different concentrations of α-mangostin and metal ions, the stoichiometric compositions of the complexes were determined according to the molar ratio method. Meanwhile the molar absorptivities and stability constants of the complexes were derived further.

关 键 词：α-山竹黄酮 金属配合物 紫外吸收光谱 化学计量配位比 表观稳定常数 

分 类 号：Q946.91[生物学—植物学] O657.32[理学—分析化学]