The selective oxidation of alcohols to aldehydes or ketones is very difficult to accomplish when the oxidant is molecular oxygen (O₂) and the reaction is carried out under ambient conditions. To meet these challenges, visible light photocatalysis was exploited to enable the use of O₂ for the selective oxidation of alcohols at room temperature. In this scheme, eosin Y, an organic dye, was connected with TiO₂ to capture visible light, leading to consequential photocatalytic processes. More importantly, these photocatalytic processes can be neatly merged with the redox catalytic cycles of TEMPO, which in turn induce the oxidation of alcohols under visible light irradiation. This work suggests that the merger of visible light photocatalysis and TEMPO catalysis has great potential for execution of challenging oxidative transformations.

中文翻译：

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用TEMPO合并染料敏化的TiO _2的可见光光催化：醇的选择性好氧氧化

当氧化剂是分子氧（O ₂）并且反应在环境条件下进行时，很难将醇选择性氧化为醛或酮。为了应对这些挑战，开发了可见光光催化技术，以使O ₂可以在室温下用于醇的选择性氧化。在该方案中，将曙红Y（一种有机染料）与TiO ₂连接捕获可见光，从而导致相应的光催化过程。更重要的是，这些光催化过程可以与TEMPO的氧化还原催化循环巧妙地合并，从而在可见光照射下诱导醇的氧化。这项工作表明可见光光催化和TEMPO催化的合并具有巨大的潜力执行具有挑战性的氧化转化。