Z. (2023). Growth of single-crystal imine-linked covalent organic frameworks using amphiphilic amino-acid derivatives in water. Nature Chemistry.

The highly luminous lanthanide metal−organic gels (Ln-MOGs) can act as fluorescent probes for the detection of organic amines and can also be used to build white-light emitting materials according to...

Uranium is one of the principal raw materials in the nuclear industry, but if released into the natural environment, it also poses latent health risks to mankind. Therefore, there is an urgent need to develop a strategy that can concurrently detect and adsorb uranium to realize the sustainable development of nuclear power and protect the environment. In this work, a fluorescent zinc-based metal–organic framework (HNU-50) was designed and synthesized for the effective detection and extraction of U­(VI). The amide groups on N-pyridin-4-ylpyridine-4-carboxamide ligands and two uncoordinated carboxyl oxygen atoms on pyromellitic acid ligands in HNU-50 provide potential uranium-binding sites. Consequently, HNU-50 is competent of selectively and efficiently catching uranyl ions, achieving an optimum adsorption capacity of 632 mg/g. Additionally, the adsorption of U­(VI) results in fluorescence quenching of HNU-50, thus allowing sensitive and selective detection of U­(VI) by fluorescence change. Note that HNU-50 exhibits a considerably low detection limit of 1.2 × 10–8 M for U­(VI) in aqueous solution, which is below the World Health Organization maximum pollution standards for potable water (6.3 × 10–8 M).

Stable presence of U(V)-containing compounds is important for the study of radionuclides. However, pentavalent uranium is prone to disproportionation, thus U(V)-containing compounds are generally sensitive to air and water. Herein,...

In this work, a novel coordination polymer HNU-55 has been synthesized by the reaction of Zn(II) ion with the organic ligand 3-pyridinesulfonic acid (PSA) under solvothermal condition, which can be used as a fluorescent sensor for the detection of doxycycline (DOX). The fluorescent performance is effective in a wide linear range from 0 to 30 μM of DOX with a low detection limit of 3.7 nM. Likewise, the fluorescent sensor presents good selectivity, anti-interference, and circularity. Additionally, the HNU-55 sensor can be successfully used to assay the content of DOX in pig feed. Furthermore, the mechanism of fluorescence enhancement has been discussed in detail, which provides a clear understanding for the antibiotic detection based on the fluorescence enhancement.

HNU-49 exhibits interesting piezofluorochromic behavior and the luminescence reversibly changes from blue to green. It can encapsulate RhB successfully, and near white-light emission can be obtained by precisely controlling the concentration of RhB and the pressure used.

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