Supramolecular electrocatalysis on high efficient oxygen evolution reaction with cucurbit[6]uril

A supramolecular strategy for electrocatalytic water splitting in attendance of a macrocyclic compound was developed. The improvement of oxygen evolution reaction (OER) was observed on the surface of modified electrode...

Using the dynamic behavior of macrocyclic monomers with a bis(hindered amino)disulfide linker for the preparation of end-functionalized polymers

End-functionalized polymers were synthesized by simply heating a mixture of a macrocyclic compound with one bis(2,2,6,6-tetramethylpiperidin-1-yl)disulfide (BiTEMPS) moiety and bifunctional acyclic BiTEMPS compounds as sources of repeat units and terminal groups, respectively.

Ultrafine Ru nanoclusters anchored on cucurbit[6]uril/rGO for efficient hydrogen evolution in a broad pH range

Ultrafine Ru nanoclusters uniformly coated on thin layer rGO were successfully synthesized via introducing macrocyclic compound cucurbit[6]uril. The obtained nanohybrid exhibits superior performance toward HER in broad pH range.

A releasable disulfide-linked peptide tag facilitates the synthesis and purification of short peptides

A peptide synthesis and purification strategy that omits a throughput-limiting chromatographic purification step offers access to large macrocyclic compound libraries.

Complexation of a macrocyclic ligand, 2,6-di (N-methyl)formamide-calix[4]pyridine, with Eu(III) and extraction of Eu(III) and Am(III)

Complexation of a new macrocyclic compound, 2,6-dimethylformamide-calix[4]pyridine (L1), with Eu(III) was studied by spectrophotometry. Stability constants of the Eu(III)/L1complex in different solvents were determined. The results reveal thatL1forms moderately strong complexes with Eu(III) and other lanthanides in aprotic solvents and shows little binding ability with transition metals. Moreover, the binding strength ofL1weakens significantly in protic solvents. Using 2-bromodecanoic acid as the synergistic reagent,L1extracts Am(III) and Eu(III) successfully with a separation factor of SFAm/Eu=1.3, and the distribution ratios of Am(III) and Eu(III) increases as the aqueous acidity is decreased. DFT computational studies were conducted to corroborate the solvent extraction data, and compare the coordination properties of Am(III)/Eu(III) complexes withL1and a related, 2,6-diformamide-calix[4]pyridine (L2). The computational results suggest thatL2could form stable complexes [ML]3+and ML(NO3)3[where M represent Am(III) or Eu(III)] in aqueous phase, in sharp contrast to the case ofL1where such complexes in aqueous phase are not stable.