Smart crystalline frameworks constructed with bisquinoxaline-based component for multi-stimulus luminescent sensing materials

Adsorption and Detection of Iodine Species by a Thorium-Based Metal–Organic Framework

“…Utilizing Th-based multi-functional materials for monitoring and sequestrating more radioactive radionuclides represents a promising strategy to overcome the aforementioned challenge. − As a subgroup of MOFs, Th-MOFs inherit the combinatorial benefits of high porosity, a large surface, and structural modularity, which offer the potential of capturing specific radionuclides in their voids. − Moreover, integrating luminescent organic linkers in a framework matrix allows for the spatial distribution of the fluorophores, which eliminates aggregation-induced quenching (AIQ) and enhances the sensing efficacy via increasing the photoluminescence quantum yield. − Indeed, actinide-based MOFs have stood out as a unique and efficient platform for capturing radionuclides, including 85 Kr, 99 Tc, 129/131 I, and 137 Cs in ionic or molecular forms. − However, the sector of radionuclide sensing based on actinide MOFs is much less explored, despite the fact that they feature unique photoswitch properties such as photoluminescence, photochromism, and fluorochromism. , …”

Water-Stable Cd(II)-Based Metal–Organic Framework: Antibiotic Detection and Photochromism Behavior

“…With further increased amount of NFT, the fluorescence is continuously reduced and almost quenched with the concentration being up to 400 μM. The I 0 / I vs [M] curve can be well fitted with the Stern–Volmer equation ( I 0 / I = 1 + K sv [M]), where I 0 and I are the luminescence intensity before and after the addition of NFT, [M] is the amount of NFT and K sv is the quenching constant), and the K sv value is calculated to be 1.36 × 10 4 M –1 , which is comparable to those of other reported coordination compounds, proving the high sensing sensitivity of 1 for NFT. − Moreover, the anti-interference tests were carried out to check the detection selectivity of the Cd-MOF for NFT in the presence of other antibiotics. As shown in Figure a, introduction of NFT to the suspension consisting of other interfering molecules could also lead to the dramatic luminescence quenching of compound 1 , which suggests that the title MOF can realize the detection of NFT with great selectivity in spite of the existence of competing substances.…”

C2O42−-templated cage-shaped Ln28(Ln = Gd, Eu) nanoclusters with magnetocaloric effect and luminescence

“…[40][41][42][43] These findings are of significant value for understanding the optical properties of the lanthanide clusters and their applications in optoelectronic devices, among others. 44…”