基于密度函数理论的油酸热氧化机制研究
Qiantong Huang1, Mengfan Niu1, Keqiang Lai1,2
1College of Food Science and Technology, Shanghai Ocean University, Shanghai, 201306, China.
Journal of molecular modeling
|November 18, 2025
概括
这项研究揭示了油酸的热氧化机制,确定低屏障基氧结合是最初的步骤. 三环环氧化物是主要产物,在高温下通过特定的氧化途径形成.
科学领域:
- 化学动力学 化学动力学
- 计算化学是一种计算化学.
- 食品化学 食品化学 食品化学
背景情况:
- 脂质氧化降低了食品的质量,产生有害的化合物,如和.
- 了解油酸氧化对于食品的保存和质量控制至关重要.
研究的目的:
- 使用4 octene模型阐明油酸的热氧化机制.
- 在热应力下识别关键反应途径和主导产物.
主要方法:
- 使用B3LYP-D3/6-31G (d,p) 和def2TZVPP基础集进行密度函数理论 (DFT) 计算.
- 基于过渡状态理论 (TST) 的动态分析,包括道效应.
- 使用 MATLAB 解决微分方程,以随着时间推移建模产品度.
主要成果:
- 低屏障的基氧结合 (<10.0 kcal/mol) 主导着早期的氧化阶段.
- 确定了四种不同的深氧化途径,其中环氧化物形成具有较低的屏障 (6.8 kcal/mol).
- 三环环氧化环氧化物被确定为高温 (60和150°C) 中的主导产品.
结论:
- 这项研究提供了对油酸热氧化过程的详细机理见解.
- 环氧化物形成是一个重要的途径,三环环氧化物是关键产品.
- 计算和运动分析是了解复杂氧化过程的宝贵工具.
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