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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Generation and Confinement of Long-Lived N-Oxyl Radical and Its Photocatalysis.
Journal of the American Chemical Society 2018 Februrary 15
Generation of controllable carbon radical under the assistance of N-oxyl radical is an efficient method for the activation of C-H bonds in hydrocarbons. We herein report that irradiation of α-Fe2 O3 and N-hydroxyphthalimide (NHPI) under 455 nm light generates phthalimide-N-oxyl radical (PINO*), which after being formed by oxidation with holes, is confined on α-Fe2 O3 surface. The half-life time of the confined radical reaches 22 s as measured by in situ electron paramagnetic resonance (EPR) after the light being turned off. This allows the long-lived N-oxyl radical to abstract the H from C-H bond to form a carbon radical that reacts with molecular oxygen to form R3 C-OO· species, decomposition of which leads to oxygenated products.
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