Red light has the advantages of low energy, less health risk and high penetration depth through various media. Herein, a helical carbenium ion (N,N'-di-n-propyl-1,13-dimethoxyquinacridinium (nPr-DMQA+) tetrafluoroborate) has been used as an organic photoredox catalyst for photoreductions and photooxidations in the presence of red light (λmax = 640 nm). It has catalyzed red-light-mediated dual transition-metal/photoredox-catalyzed C-H arylation and intermolecular atom transfer radical addition through oxidative quenching. Moreover, its potential in photooxidation catalysis has also been demonstrated by successful applications in red-light-induced aerobic oxidative hydroxylation of arylboronic acids and benzylic C(sp3)-H oxygenation through reductive quenching. Thus, a versatile organic photoredox catalyst (helical carbenium ion) for red-light-mediated photoredox reactions has been developed.

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螺旋碳鎓离子：一种用于红光介导反应的多功能有机光氧化还原催化剂

红光具有能量低、健康风险小、通过各种介质穿透深度高等优点。在此，螺旋碳鎓离子（N,N'-二正丙基-1,13-二甲氧基喹吖啶鎓（nPr-DMQA+）四氟硼酸盐）已被用作有机光氧化还原催化剂，用于在红光（λmax = 640 纳米）。它通过氧化猝灭催化红光介导的双过渡金属/光氧化还原催化的 CH 芳基化和分子间原子转移自由基加成。此外，其在红光诱导的芳基硼酸有氧氧化羟基化和通过还原淬灭的苄基 C(sp3)-H 氧化中的成功应用也证明了其在光氧化催化中的潜力。因此，