2-butanone过氧化物 (MEKP) 酸的寡合体依赖气相解离行为
John R Stutzman1, Ryan M Bain2, Brison A Shira3
1Global Analytical, Safety, Data Science, The Dow Chemical Company, Midland, Michigan 48667, United States.
Journal of the American Society for Mass Spectrometry
|March 6, 2026
概括
这项研究揭示了离子化二butanone过氧化物 (MEKP) 寡合体如何根据大小不同地碎片. 较短的寡合物通过电荷诱导路径分裂,而较长的寡合物通过电荷远程路径在并联MS分析中使用.
科学领域:
- 分析化学 分析化学
- 法医化学 法医化学
- 有机化学 有机化学
背景情况:
- 2-butanone过氧化物 (MEKP) 是一个重要的工业交叉链接器,并且由于其在自制炸药中的使用,引起了法医的关注.
- 了解MEKP的碎片化行为对于其检测和表征至关重要.
研究的目的:
- 通过使用双重质谱法 (MS) 调查氨基化MEKP寡合物的解离行为.
- 根据寡合体长度和离子添加物来区分碎片化途径.
- 为改善有机过氧化物检测和表征提供见解.
主要方法:
- 协奏质谱法 (MS/MS) 用于研究氨基化MEKP寡合物的解离 (n=3-9).
- 使用金属离子添加物的对照实验进行了路径验证.
- 进行了MS3分析,以检查连续的碎片化模式.
主要成果:
- 较短的MEKP寡合体 (n=3,4) 显示电荷诱导的碎片化,产生周期性和较小的寡氧氧化物离子.
- 较长的MEKP寡合体 (n=6-9) 表现出电荷远程碎片,产生终端修饰的基离子.
- MEKP寡合体 (n=5) 显示了两种碎片化途径的混合,表明了一个过渡点.
结论:
- 氨基化MEKP寡合物的碎片化途径取决于寡合物的长度,而的结合强度会影响该机制.
- 在电荷诱导和电荷远程路径之间观察到明显的解离行为,有助于结构阐明.
- 这些发现有助于更好地了解MS中的有机过氧化物碎片化,这对于法医和工业应用至关重要.
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