Since Fe(III) ion is of importance in biological systems, the development of new sensors for detecting Fe(III) with excellent selectivity and low detection limit is desirable. Herein, a new stable...
The interaction between an aMOC and miRNA/DNA is studied and the use of the aMOC as an effective amplifier in a QCM sensor to detect miRNA is developed for the first time.
Cationic amorphous metal-organic cage (MOC)-based materials capable of removing anionic pollutants from water are receiving increasing attention but they are still relatively less reported. Herein, for the first time, a cationic porous MOC-based extended framework, namely, CL-aMOC-1, was constructed by covalent linking of a cationic Pd 12 L 24 (L = 3,5-di-pyridin-4-ylbenzaldehyde) cage with a 1,4-bis(4-aminophenyl)benzene (BAPB) linker. Interestingly, the reaction could be completed within 15 min using an amorphous MOC-based solid (aMOC-1) and BAPB as reactant via a low-temperature solid-state reaction. The CL-aMOC-1 showed improved stability, lower solubility and higher oxo-anion uptake in water compared with the original aMOC-1. The adsorption capacities for CrO 4 2À , Cr 2 O 7 2À and ReO 4 Àon CL-aMOC-1 were 245.1, 311.5 and 452.5 mg/g, respectively, in which the uptake of Cr(VI)-containing oxoanions was among the highest compared with those of other metal-organic materials. The CL-aMOC-1 can selectively capture oxo-anions in the presence of competitive anions. It exhibits good reusability as over 85 % of the uptake capacity is retained after 5 cycles. Finally, it shows the ability to remove Cr(VI) ions from electroplating wastewater.
Invited for this month's cover are the collaborating groups of Sheng‐Run Zheng and Wei‐Guang Zhang from South China Normal University, China. The cover picture shows an amorphous cationic porous metal‐organic material that constructed from the covalent linking of large cationic metal‐organic cage for the removal of toxic oxo‐anions from water with high capacities and rapid kinetics. Read the full text of the article at 10.1002/cplu.202000570.
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