Mechanistic and kinetic studies of visible light photoredox reactions

IF 6.1 Q2 CHEMISTRY, PHYSICAL Chemical physics reviews Pub Date : 2023-09-01 DOI:10.1063/5.0156850
Eric D. Talbott, Nora L. Burnett, John R. Swierk
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Abstract

The use of visible light to enable small molecule synthesis has grown substantially over the last 15 years. While much of the focus has been on the development of new methods, mechanistic and kinetic studies can provide valuable information about reaction steps and highlight directions for optimization and new methods. This review focuses on reports of visible light, homogenous photoredox reactions that emphasize direct observation of reaction intermediates and/or contain a significant focus on mechanistic and kinetic studies. How these types of studies can improve reaction yields and rates are highlighted. Finally, reaction quantum yields for over 200 photoredox reactions are summarized for the first time. This often-neglected reaction parameter provides valuable insights into the efficiency of photoredox reactions as well as the clues to the underlying mechanism.
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可见光光氧化还原反应的机理和动力学研究
在过去的15年里,可见光在小分子合成中的应用有了长足的发展。虽然大部分焦点都集中在新方法的开发上,但机理和动力学研究可以提供有关反应步骤的宝贵信息,并为优化和新方法指明方向。这篇综述的重点是关于可见光、均相光氧化还原反应的报道,这些反应强调直接观察反应中间体和/或包含重要的机制和动力学研究。这些类型的研究如何能够提高反应收率和速率被强调。最后,首次总结了200多种光氧化还原反应的反应量子产率。这个经常被忽视的反应参数为光氧化还原反应的效率提供了有价值的见解,并为潜在的机制提供了线索。
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