Journal of Photochemistry and Photobiology A: Chemistry 355 (2018) 109–113 Contents lists available at ScienceDirect Journal of Photochemistry and Photobiology A: Chemistry journal homepa ge: www.elsev ier.com/locate/jphotochem Invited feature article Visible-light-mediated C(sp )-H activation by photo-induced hydrogen-atom transfer Han Li, Ming-Tian Zhang Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, China A R T I C L E I N F O A B S T R A C T Article history: Visible-light-mediated C(sp )-H activation has recently emerged as a powerful tool for functionalization Received 17 July 2017 Received in revised form 18 September 2017 of CH bonds. In this work, we reported that the triplet state of Lumiﬂavin is a good candidate to directly Accepted 30 September 2017 abstract hydrogen atom from C(sp )-H substrates. Following photoexcitation by visible light (440 nm), Available online 31 October 2017 the organic molecule Lumiﬂavin (LF) can form the excited-state *LF, which is competent to oxidize a range of CH substrates. Product analysis and kinetic data showed that these reactions occurred via rate Keywords: determining hydrogen-atom-transfer (HAT), with a linear correlation for log(k) vs BDE (CH) and Triplet-excited ﬂavin KIE = 3.2 for 9, 10-dihydroantracene (DHA).
Journal of Photochemistry and Photobiology A: Chemistry – Elsevier
Published: Mar 15, 2018
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