基在NTO降解中的作用:DFT研究
Liudmyla K Sviatenko1, Leonid Gorb2,3, Jerzy Leszczynski1
1Interdisciplinary Center for Nanotoxicity, Department of Chemistry, Physics & Atmospheric Sciences, Jackson State University, Jackson, Mississippi 39217, United States.
The journal of physical chemistry. A
|October 5, 2023
概括
基基有效地降解了水中的能量物质NTO (5-nitro-1,2,4-triazol-3-one). 这项计算研究揭示了多步分解机制,突出了基.
科学领域:
- 环境化学环境化学
- 计算化学的计算化学
- 化学动力学 化学动力学
背景情况:
- 基基 (•OH) 是水生环境中的关键反应性氧物种,驱动污染物降解.
- 5-nitro-1,2,4-triazol-3-one (NTO) 是一种具有高水溶性的能量材料,具有环境风险.
- 了解NTO的环境命运,特别是其退化途径,对于风险评估至关重要.
研究的目的:
- 阐明由基激素启动的NTO在水中的分解的详细机制.
- 为了研究NTO的阳离子形式对其与基激素的反应性的影响.
- 评估基反应对NTO整体环境退化的贡献.
主要方法:
- 计算化学方法,特别是PCM/M06-2X/6-311++G的理论水平.
- 对NTO-基相互作用的反应途径,中间体和过渡状态的分析.
- 计算激活能量和反应强度以确定反应的可行性.
主要成果:
- 通过基分解NTO分解是一个多步骤的过程,由CN键的基质添加开始.
- 反应会经历各种变化,包括激素附着,转移,异构和键裂变等.
- 与中性形式相比,NTO的阳离子形式对基基具有更高的反应性.
- 降解产品包括低分子量无机化合物,如氨,气和各种氧化物.
结论:
- 基诱导的分解是NTO环境退化的重要途径.
- 反应机制涉及复杂的中间转化,导致完全矿化.
- 计算结果支持基激素在NTO环境修复中的重要作用.
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