期刊
PROCEEDINGS OF THE COMBUSTION INSTITUTE
卷 31, 期 -, 页码 521-528出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.proci.2006.07.172
关键词
semiquinone radical; phenoxyl radical; cyclopentadienyl radical; particulate matter
资金
- NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES [P42ES013648, R13ES022854] Funding Source: NIH RePORTER
- NIEHS NIH HHS [P42 ES013648, R13 ES022854] Funding Source: Medline
We demonstrate that stable and relatively unreactive environmentally persistent free radicals (PFRs) can be readily formed in the post-flame and cool-zone regions of combustion systems and other thermal processes. These resonance-stabilized radicals, including semiquinones, phenoxyls, and cyclopentadienyls, can be formed by the thermal decomposition of molecular precursors including catechols, hydroquinones and phenols. Association with the surfaces of fine particles imparts additional stabilization to these radicals such that they can persist almost indefinitely in the environment. A mechanism of chemisorption and electron transfer from the molecular adsorbate to a redox-active transition metal or other receptor is shown through experiment, and supported by molecular orbital calculations, to result in PFR formation. Both oxygen-centered and carbon-centered PFRs are possible that can significantly affect their environmental and biological reactivity. (C) 2006 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据