Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 140, Issue 6, Pages 2032-2035Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b12928
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Funding
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17020300]
- National Natural Science Foundation of China [21690082, 21690084, 21690080]
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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 alpha-Fe2O3 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 alpha-Fe2O3 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 R3C-OO center dot species, decomposition of which leads to oxygenated products.
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