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1.
Chem Commun (Camb) ; 2020 Feb 10.
Artigo em Inglês | MEDLINE | ID: mdl-32040110

RESUMO

Here, a hollowed-out Au@AgPt core-frame nanostructure is carved in the presence of PtCl62- via galvanic replacement (GR) reaction, during which the dissolution of Ag atoms from the {100} facets and the deposition of Pt atoms on the active edges of the nanocubes occur. Both ex situ and in situ monitoring of the plasmonic and structural evolutions at the single-particle level, confirmed also by theoretical simulations, shows a three-phase mechanism involved.

2.
Biosens Bioelectron ; 145: 111704, 2019 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-31539649

RESUMO

A simple and efficient strategy was developed to fabricate CuO nanoparticles (CuO-NPs) with high surface area by the direct pyrolysis of a metal-organic gel (MOG) precursor for constructing versatile catalytic interfaces. Unexpectedly, the obtained CuO-NPs exhibited excellent electrocatalytic activity for glucose (Glu) oxidation reaction. The linear range of glucose was from 5 µM to 600 with the detection limit of 0.59 µM. Additionally, the CuO-NPs showed distinguished intrinsic peroxidase-mimicking activities, which can be further used as biomimetic nanozymes for sensitively and rapidly detecting cholesterol. A good linearity of cholesterol was performed in the range from 1 µM to 15 µM with the detection limit of 0.43 µM. The as-prepared CuO-NPs could provide a versatile catalytic platform for the application of electrochemical sensors and biomimetic enzyme catalytic systems. This study proved the high potential of MOG-derived nanostructured transition metal oxides (TMOs) with multiple complex functions.

3.
J Org Chem ; 84(4): 1797-1807, 2019 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-30664353

RESUMO

A new strategy for the construction of two kinds of fully substituted pyrroles, including 2-aminopyrroles and bicyclic pyrroles from Morita-Baylis-Hillman (MBH) acetates with 1,1-enediamines (EDAMs), or heterocyclic ketene aminals (HKAs) via base-promoted tandem Michael addition, elimination, and aromatization sequence has been developed, affording the expected products in moderate to excellent yields. This methodology is a highly efficient, concise way to access 2-aminopyrroles or bicyclic pyrroles with diversity in molecular structures from accessible building blocks under moderate reaction conditions.

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