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标题：Magnetically modulated photochemical reaction pathways in anthraquinone molecules and aggregates
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作者：Wubin Wu ; Baipeng Yin ; Wei Peng 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2021
卷号：24
期号：5
页码：1-12
DOI：10.1016/j.isci.2021.102458
语种：English
出版社：Elsevier
摘要：SummaryThe chemical reactions involving excited-state radical pairs (RPs) of parallel/anti-parallel spin configurations are sensitive to magnetic field, leading to the possibilities of magnetically controlled synthesis of chemical compounds. Here we show that the reaction of anthraquinone (AQ) in sodium dodecyl sulfate (SDS) micellar solution under UV excitation is significantly influenced by applying external field. The steady state and time-resolved spectroscopies reveal that the reaction intermediate (pairs of AQH-SDS radicals) can undergo two distinct pathways depending on whether it is spin singlet or triplet, and the field is beneficial to the conversion between spin configurations of RPs. The applied field not only affects the reaction rate constant but also changes the final products. Besides, the aggregation of AQ molecules would change the population of singlets and triplets and thus enhance magnetic field effect. This work represents a promising way of controlling chemical reaction and improving reaction selectivityviamagnetic field methods.Graphical abstractDisplay OmittedHighlights•Magnetically modulated photochemical reaction provides guidelines for organic synthesis•Magnetic field can facilitate the singlet-triplet spin conversion of radical pairs•Time-resolved spectroscopy reveals magnetically modulated dynamics of radical pairsChemistry; Catalysis; Physical chemistry; Magnetochemistry; Magnetism;