Perspective: How can ultrafast laser spectroscopy inform the design of new organic photoredox catalysts for chemical and materials synthesis?
Perspective: How can ultrafast laser spectroscopy inform the design of new organic photoredox catalysts for chemical and materials synthesis?
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DOI：
10.1063/1.5082620
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发表时间：
2019-01
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影响因子：
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通讯作者：
A. Orr-Ewing
中科院分区：
文献类型：
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作者：
A. Orr-Ewing
光氧化还原催化是利用光活化分子作为电子供体或受体在温和条件下引发化学转化的化学反应，广泛应用于有机化合物和材料的合成。最初为这些光氧化还原催化应用开发的过渡金属中心络合物正在稳步被更可持续和更低毒性的有机光催化剂所取代。虽然光氧化还原活性有机分子的可能结构的多样性带来了设计灵活性的好处，但它也对光催化剂分子结构的优化提出了相当大的挑战。从飞秒到微秒域的时间尺度上的瞬态吸收光谱可以探索这些有机光催化剂在溶液中的活化和反应的详细机制，并且通过将其动力学性质与其结构联系起来，有可能为未来开发改进的光催化剂建立可靠的设计原则。
Photoredox catalysis of chemical reactions, using light-activated molecules which serve as electron donors or acceptors to initiate chemical transformations under mild conditions, is finding widespread use in the synthesis of organic compounds and materials. The transition-metal-centred complexes first developed for these photoredox-catalysed applications are steadily being superseded by more sustainable and lower toxicity organic photocatalysts. While the diversity of possible structures for photoredox-active organic molecules brings benefits of design flexibility, it also presents considerable challenges for optimization of the photocatalyst molecular architecture. Transient absorption spectroscopy over timescales from the femtosecond to microsecond domains can explore the detailed mechanisms of activation and reaction of these organic photocatalysts in solution and, by linking their dynamical properties to their structures, has the potential to establish reliable design principles for future development of improved photocatalysts.