We report a new class of Zn anodes modified by a three-dimensional nanoporous ZnO architecture (Zn@ZnO-3D), which can accelerate the kinetics of Zn2+ transfer and deposition, inhibit dendrite growth, and reduce the side-reactions.
In this paper, Au/TiO2 nanocomposite was synthesized and utilized as highly efficient and green photocatalyst for organic reactions. A sheet‐like anatase titanium dioxide material with a highly active (001) crystal plane was prepared via a solvothermal method. Gold nanoparticles were then loaded on the surface of TiO2 by a liquid‐phase reduction method to give an Au/TiO2 material with good photocatalytic activity. The Au/TiO2 nanocomposite was utilized as a photocatalyst to develop a light‐promoted Minisci oxidative coupling reaction of ether and aza aromatics by using oxygen as green oxidant and only catalytic amount of acid as additive. The protocol shows a good functional group tolerance as well as good to excellent yields for various substrates. With mechanistic studies, Au/TiO2 nanocomposite proved to be an efficient photocatalyst to activate C−H bond via a SEO approach of heteroatoms. Moreover, the solid semiconductor photocatalyst shows good recycling performance, could be easily recovered and reused without significant decrease in yield.
The
chemiluminescence resonance energy transfer (CRET)-based method
is free of autofluorescence interference, which can achieve an extremely
high signal-to-background ratio for detection. Nevertheless, this
method is still hindered by the inner filter effect, quenching effect,
and nonspecific absorption of reported nanoparticles. Herein, mesoporous
silica nanomaterials (MSNs) acted as carriers to load both the donor
(horseradish peroxidase, HRP) and the acceptor (a functional DNA duplex).
This approach realized the construction of a new CRET-based nanosensor
for the sensitive detection of miRNA. By controlling the energy-transfer
distance with the designed DNAs, the donor emission at 430 nm could
be quenched by the adsorption of the dye labeled on the acceptor DNA.
The CRET system could be destroyed by releasing acceptor DNA from
linker DNA via the competitive hybridization of target miRNA, resulting
in emission recovery for quantification. With the cancer biomarker
miR-155 as the model, the sensitive and selective detection of miR-155
was achieved, which showed high energy-transfer efficiency, good specificity,
favorable biodegradability, and low toxicity. This work provides a
potential pathway for biological detection and clinical diagnosis.
A selective electrochemical direct para-C–H-thiocyanation reaction of aromatic amines under metal-, oxidant- and exogenous-electrolyte-free conditions was achieved in the presence of NH4SCN.
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