显式水化在CO3清理中的作用 by Trolox:一个DFT研究
Ana Amić1, Denisa Mastil'ák Cagardová2
1Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Ulica Cara Hadrijana 8A, 31000 Osijek, Croatia.
International journal of molecular sciences
|December 11, 2025
概括
碳酸盐离子基 (CO3•−) 可能是氧化应激的主要原因. 补水显著影响其与Trolox等抗氧化剂的活性,影响反应速率和机制.
科学领域:
- 计算化学的计算化学
- 生物化学 生物化学
- 氧化压力研究研究 氧化压力研究
背景情况:
- 传统上,基 (HO•) 被视为氧化应激的主要驱动因素.
- 新出现的证据表明,在生理条件下,碳酸盐离子基 (CO3•−) 作为潜在的更重要的贡献者.
- CO3•−存在于水溶液中的水合物种,影响其化学行为.
研究的目的:
- 理论上研究水分子溶解对Trolox的CO3•−无活化的影响.
- 检查反应期间在Trolox溶解中与结合的水分子在Trolox溶解中的作用.
- 探索水合对CO3•−和Trolox之间的单电子转移 (SET) 机制的影响.
主要方法:
- 密度函数理论 (DFT) 方法用于理论计算.
- 研究了不同数量的显式水分子 (0,4,6,9) 对CO3•−反应系统的影响.
- 分析了对Trolox的溶解效应及其与CO3•−的相互作用.
主要成果:
- 增加CO3•−的水分增强了运动性,并降低了SET通路的反应屏障.
- 表面速率常数显示微小的变化,尽管由于水化导致的内在反应性发生了变化.
- 特罗洛克斯迪亚尼的明确水化显著影响反应速率.
- 电子转移到CO3•−主要来自Trolox的部分,而不是其离子组.
结论:
- 微水化方法提供了一种方法来评估化合物的有效性,以减轻CO3•−引起的氧化损伤.
- 对CO3•−反应性及其与抗氧化剂的相互作用的计算研究对于理解氧化应激至关重要.
- 这些发现强调了在抗氧化活性评估中考虑水合效应的重要性.
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