School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4000, Australia.
School of Earth & Atmospheric Sciences, Queensland University of Technology, Brisbane, QLD, 4000, Australia.
Chem Commun (Camb). 2022 Sep 15;58(74):10416-10419. doi: 10.1039/d2cc04024g.
The radical reactions of dimethylsulfoxide (DMSO) and tetrahydrothiophene-1-oxide (THTO) with reactive oxygen species (ROS) in the presence of a nitroxide radical scavenger have been evaluated both synthetically and in analytical practice. Fenton-mediated generation of oxygen-centred radicals produced several unusual products that reflect the fragmentation and ring-opening radical mechanisms of DMSO and THTO respectively. Addition of pollution-derived ROS to DMSO/THTO nitroxide solutions produced LC-MS detectable amounts of the same products isolated from the larger-scaled Fenton reactions. For air pollution analysis, these results highlight the complexity surrounding DMSO reactivity and fragmentation, and indicate that THTO produces simpler outcomes that should facilitate analysis of the processes involved.
在氮氧自由基清除剂存在的情况下，评估了二甲基亚砜（DMSO）和四氢噻吩-1-氧化物（THTO）与活性氧物种（ROS）的自由基反应，无论是在合成方面还是在分析实践中。芬顿介导的氧中心自由基的生成产生了几种不寻常的产物，分别反映了 DMSO 和 THTO 的碎片化和开环自由基机制。将源自污染的 ROS 添加到 DMSO/THTO 氮氧自由基溶液中，产生了可通过 LC-MS 检测到的相同产物，这些产物是从更大规模的芬顿反应中分离出来的。对于空气污染分析，这些结果突出了 DMSO 反应性和碎片化所涉及的复杂性，并表明 THTO 产生更简单的产物，这应该有助于分析所涉及的过程。
