The development of photoredox catalysis has recently enabled the design of remarkably powerful synthetic tools now commonly used in a wide array of chemical transformations, and notably for the generation of radical species under mild, safe and environmentally friendly conditions. This field is largely dominated by ruthenium and iridium complexes, the main alternative to the use of these photocatalysts mostly relying on the use of organic dyes, which poses problems not only in terms of cost - therefore strongly limiting synthetic applications of photocatalysis - but also, more importantly, for the design of new light-mediated transformations. Much less attention has been devoted to the use of copper complexes in photoredox catalysis, despite their strong potential not only as cheaper catalysts but also for the activation of a broader range of substrates. Most copper complexes are indeed known to be poor photocatalysts, mostly due to their short-lived excited states and low redox potentials. Over the last decade, one copper-based copper complex has however emerged as a remarkably efficient and general photoredox catalyst, which is at the core of this Spotlight that highlights its applications as a photosensitizer and its potential.

中文翻译：

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[Cu（bcp）DPEPhos] +：多功能高效的铜基光氧化还原催化剂和光敏剂

光氧化还原催化的发展最近使设计出了功能强大的合成工具成为可能，这些合成工具现在广泛用于各种化学转化中，尤其是在温和，安全和环境友好的条件下生成自由基物种。该领域主要由钌和铱配合物所主导，钌和铱配合物是使用这些光催化剂的主要替代方法，主要依赖于有机染料的使用，这不仅在成本方面造成了问题-因此强烈限制了光催化的合成应用-而且，更重要的是，用于设计新的光介导的转换。铜络合物在光氧化还原催化中的使用已很少受到关注，尽管它们具有很强的潜力，不仅可以作为廉价的催化剂，而且还可以活化更广泛的底物。实际上，大多数铜络合物确实是不良的光催化剂，主要是由于它们的激发态寿命短和氧化还原电势低。然而，在过去的十年中，一种铜基铜络合物已成为一种非常有效且通用的光氧化还原催化剂，这是本Spotlight的核心，强调了其作为光敏剂的应用及其潜力。