Konieczny Krzysztof A, Paul Indrajit, Rodriguez Jose A, Garcia-Garibay Miguel A
Department of Chemistry and Biochemistry, University of California at Los Angeles, Los Angeles, California 90095, United States.
Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland.
ACS Cent Sci. 2024 Dec 6;10(12):2346-2352. doi: 10.1021/acscentsci.4c01429. eCollection 2024 Dec 25.
Electron microscopy in its various forms is one of the most powerful imaging and structural elucidation methods in nanotechnology where sample information is generally limited by random chemical and structural damage. Here we show how a well-selected chemical probe can be used to transform indiscriminate chemical damage into clean chemical processes that can be used to characterize some aspects of the interactions between high-energy electron beams and soft organic matter. Crystals of a Dewar benzene exposed to a 300 keV electron beam facilitate a clean valence-bond isomerization radical-cation chain reaction where the number of chemical events per incident electron is amplified by a factor of up to ca. 90,000.
各种形式的电子显微镜是纳米技术中最强大的成像和结构解析方法之一，在纳米技术中，样本信息通常受到随机化学和结构损伤的限制。在这里，我们展示了如何使用精心挑选的化学探针将无差别化学损伤转化为可用于表征高能电子束与软有机物质之间相互作用某些方面的清洁化学过程。暴露于300 keV电子束的杜瓦苯晶体促进了一个清洁的价键异构化自由基阳离子链反应，其中每个入射电子的化学事件数量最多可放大约90,000倍。
