The
activation of Type III heterojunctions through inserting plasmonic
metal nanoparticles (NP) between the semiconductor components as a
bridge for the selective capture and interband transfer of the photothermal-induced
charges and constructing a robust Type B heterojunction photothermocatalyst
shows the potential to overcome the trade-off between light response
range and redox potentials of the mainstream Type II, Z-scheme, and
S-scheme heterojunctions. A series of Type B heterojunctions CuWO4/Ag/GdCrO3, WO3/Ag/GdCrO3, and Bi2WO6–x
F2x
/Ag/GdCrO3 are constructed through
introducing a plasmonic Ag NP bridge, and the relation between the
required plasmonic intensity of the bridge and energy barrier of the
parent heterojunctions is correlated. The as-developed Type B heterojunction
WO3/Ag/GdCrO3 exhibits a 73 times higher photothermocatalytic
toluene degradation rate and a 44 times higher photothermocatalytic
CO yielding rate from CO2 reduction than those of parent
Type III WO3/GdCrO3, and ranges among the best
of state-of-the-art photocatalytic or photothermocatalytic performance
in both VOC oxidation and CO2 reduction.
A simple and efficient copper(II)‐catalyzed C5 azidation of N‐acylated 8‐aminoquinolines by remote C−H activation was developed. On the basis of this reaction, a series of new C5‐azidated 8‐amidequinolines were synthesized in moderate to good yields.
We report herein the first example of Cu(II)-catalyzed site selective azidation of aromatic amines via C-H functionalization in aqueous media. In our strategy, a mild reagent was utilized. HO served as the oxidant, and sodium azide was used as the azidation reagent. This method could also be applied to late-stage functionalization of drugs that possess an aromatic amine moiety. In addition, we found that bromination or iodination on the ortho-position of aromatic amines could occur efficiently using this catalytic system.
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