探索高价值铜物种与新出现的污染物的反应性,使用预测性QSAR建模
Tao Zhao1, Minghao Xu1, Xuerui Yang1
1State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, People's Republic of China.
Environmental technology
|March 31, 2025
概括
这项研究开发了一种定量结构-活性关系 (QSAR) 模型,以预测高价值铜物种 (Cu(III)) 与新出现的污染物的反应性. 该模型准确地预测了反应速度,有助于环境修复策略.
科学领域:
- 环境化学环境化学
- 绿色化学 绿色化学
- 计算化学计算化学
背景情况:
- 高价值金属物种 (HVMS) 由于其氧化能力,显示出对环境修复的希望.
- 由于HVMS的不稳定性,其动力学研究和实际应用有限.
- 预测HVMS与新出现的污染物 (EC) 的反应性对于有效的治疗至关重要.
研究的目的:
- 开发一种定量结构-活性关系 (QSAR) 模型,用于预测高价值铜种 (Cu(III)) 与ECs的反应速率常数.
- 在先进的氧化过程中 (AOPs) 确定影响Cu(III) 反应性的关键分子描述剂.
- 为使用HVMS选择性去除EC提供预测工具.
主要方法:
- 开发一个使用伪第一阶速常数 (k) 进行Cu (III) -EC反应的QSAR模型.
- 确定最佳分子描述符:极地表面积 (PSA),碳上的希尔什菲尔德电荷 (q(C-) X),以及最低的空置分子轨道能量 (E_LUMO).
- 使用R^2_adj,Q^2_LOO和Q^2_ext指标验证QSAR模型.
- 密度函数理论 (DFT) 计算以阐明反应机制.
主要成果:
- 建立了一个最佳的QSAR模型 (log k = 0.002×PSA - 10.1465×q(C-) X - 4.5896×E_LUMO - 2.0116),具有强大的预测能力 (R^2_adj=0.822,Q^2_LOO=0.784,Q^2_ext=0.951).
- 确定PSA,q(C-) X和E_LUMO是控制Cu(III) 反应性的关键协同因素.
- 较大的PSA促进了EC扩散,较小的q(C-) X增强了EC的核友性,较低的E_LUMO优化了能量差距以提高反应性.
结论:
- 开发的QSAR模型准确地预测了Cu(III) 与EC的反应性,填补了关键的知识空白.
- 分子描述符PSA,q(C-) X和E_LUMO为反应机制提供了洞察力.
- 这项研究为设计使用HVMS的选择性环境修复策略提供了可靠的参考.
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