作为潜在抗氧化剂的Cu3,Cu5,Cu和Cu7集群的比较:一个理论的探索
Batoul Alipour1, Mohamad Zaman Kassaee2
1Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
Journal of molecular modeling
|April 16, 2024
概括
铜集群 (Cun) 可以通过与RO•基相比与ROH非基更强烈地相互作用来清理活性氧物种 (ROS),作为抗氧化剂.
科学领域:
- 计算化学计算化学
- 材料科学 材料科学 材料科学
- 生物化学 生物化学
背景情况:
- 反应性氧物种 (ROS) 在生物系统中起着双重作用,既可以作为信号分子,也可以作为破坏性剂.
- 了解金属集群与ROS的相互作用对于开发抗氧化应激治疗策略至关重要.
- 铜 (Cun) 集群正在研究它们在调节ROS水平方面的潜在作用.
研究的目的:
- 从理论上研究铜集群 (Cun,n=3,5,7) 在从酒精 (ROH) 中清理或产生活性氧基 (RO•) 的双重作用.
- 阐明水中Cun集群与激进 (RO) 和非激进 (ROH) 物种之间的相互作用机制.
- 确定控制铜集群抗氧化或亲氧化行为的因素.
主要方法:
- 密度函数理论 (DFT) 计算使用B3LYP和M06函数与指定的基础集 (6-311++G(d,p) 和LANL2DZ/SDD).
- 对RO和ROH复合体的几何参数,结合能 (Eb) 和键解离能 (BDE) 的分析.
- 使用分子中的原子量子理论 (QTAIM) 和自然键轨道 (NBO) 分析解释结合相互作用.
主要成果:
- 铜集群显著降低了ROH的键解离能 (BDE),促进了基质生成和清理.
- Cun集群与RO•基之间的相互作用比与ROH非基的相互作用更强大,更共价.
- 与ROH (亲氧化作用) 相比,Cun集群与RO• (抗氧化作用) 的相互作用更为明显.
结论:
- 铜集群显示,它更喜欢与RO•基相互作用和清理,这表明它具有主要的抗氧化功能.
- 该理论框架提供了对金属集群ROS调制机制的见解.
- 这些发现有助于了解受氧化应激影响的生物系统中基于铜的干预措施.
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