天然产物研究与开发 ›› 2017, Vol. 29 ›› Issue (10): 1666-1670.doi: 10.16333/j.1001-6880.2017.10.006

• 研究论文 • 上一篇    下一篇

紫花苜蓿中4种黄酮类化合物抗氧化活性的DFT研究

胡栋宝,伍贤学,陈文静,杨猛,李银科*   

  1. 玉溪师范学院资源环境学院,玉溪 653100
  • 出版日期:2017-10-27 发布日期:2017-10-27
  • 基金资助:

    国家自然科学基金(21562044);云南省教育厅资助性项目(2016ZZX200)

Theoretical Investigation on Antioxidant Activity of Four Flavonoids  from Medicago sativa L.by Density Functional Theory

HU Dong-bao, WU Xian-xue, CHEN Wen-jing, YANG Meng, LI Yin-ke*   

  1. College of Resources and Environment, Yuxi Normal University, Yuxi 653100, China
  • Online:2017-10-27 Published:2017-10-27

摘要: 为研究紫花苜蓿中4种黄酮类化合物抗氧化活性大小,运用密度泛函理论(DFT)方法在B3LYP/6311++G(d,p)水平下研究了紫花苜蓿中四个活性黄酮化合物槲皮素、木犀草素、染料木素、芒柄花黄素的电子结构、自由基电子几何结构、酚羟基氢氧键离解能(BDE)以及分子前线轨道的能级差。通过数据分析,初步判断出这四个黄酮类化合物的抗氧化活性的大小顺序为:槲皮素>木犀草素>染料木素>芒柄花黄素。理论预测结果与文献报道的实验结果一致。本研究结果表明DFT方法可为天然黄酮类抗氧化剂的筛选提供理论指导。

关键词: 紫花苜蓿, 黄酮, DFT, 键离解能(BDE), 抗氧化活性

Abstract: To study the antioxidant ability order of the four flavonoids compounds from  Medicago sativa  L. Four main flavonoids from the Medicago sativa  L. were studied using the Density Functional Theory (DFT) B3LYP method with 6-311 + + G (d,p) basis set.Their activities were analyzed based on molecular structure,free radical geometry,bond dissociation energy (BDE) and the energy gap between HOMO and LUMO.The antioxidant ability order of the four flavonoid compounds is Quercetin>Luteolin>Genistein>Formononetin,which is consistent with the experimental conclusion reported in literature.The results showed that the DFT method can provide theoretical guidance for the selection of natural flavonoid antioxidants.

Key words: Medicago sativa L., flavonoid, DFT, bond dissociation energy (BDE), antioxidant activity

中图分类号: 

O64