A stable zirconium based metal-organic framework for specific recognition of representative polychlorinated dibenzo-p-dioxin molecules

Abstract

Polychlorinated dibenzo- p -dioxins (PCDDs), as a class of persistent and highly toxic organic pollutants, have been posing a great threat to human health and the environment. The sensing of these compounds is important but challenging. Here, we report a highly stable zirconium-based metal-organic framework (MOF), Zr 6 O 4 (OH) 8 (HCOO) 2 (CPTTA) 2 (BUT-17) with one-dimensional hexagonal channels and phenyl-rich pore surfaces for the recognition and sensing of two representative PCDDs, 2,3-dichlorodibenzo- p -dioxin (BCDD) and 2,3,7,8-tetrachlorodibenzo- p -dioxin (TCDD), based on the fluorescence quenching. BUT-17 exhibits high sensing ability with the detection limits as low as 27 and 57 part per billion toward BCDD and TCDD, respectively, and is very selective as well without the interference of similar compounds. The recognition of BUT-17 toward BCDD is demonstrated by single-crystal structure of its guest-loaded phase, in which the fluorescence-quenched complexes form between the adsorbed BCDD molecules and the MOF host through π-π stacking and hydrogen bonding interactions.

Construction of a luminescent square-like Cd6Eu2 nanocluster for the quantitative detection of 2,6-dipicolinic acid as an anthrax biomarker

“…The former leads to a change in fluorescence lifetime, while the lifetime does not change in the latter. 39,40 The former is related to the collision between fluorescent molecules and analytes, accompanied by the change in fluorescence lifetime. On the other hand, the latter involves the formation of ground-state molecular association, without the lifetime change.…”

A Li-based MOF-derived multifunctional PEO polymer solid-state electrolyte for lithium energy storage

“…Metal–organic framework (MOF) materials possess fascinating architectures and a wide range of potential applications, particularly in gas storage, chemical separation, drug delivery, catalysis, energy storage and chemo-sensing. 36–41 Recently, MOFs have been widely investigated in energy storage systems as both active materials and separators due to their unique properties. MOF additives in SSPEs have exhibited improved ionic conductivities and superior interfacial properties due to their low modulus.…”

Carbon support tuned electrocatalytic activity of a single-site metal–organic framework toward the oxygen reduction reaction

“…As an emerging class of periodically ordered porous crystalline materials, metal-organic frameworks (MOFs) have attracted extensive attention from interdisciplinary fields and been widely employed in a myriad of applications including gas storage and separation, [1][2][3] optoelectronics, photovoltaics, [4][5][6] sensing, [7][8][9][10] biomedicine, [11][12][13][14] catalysis, [15][16][17][18][19] and energy storage and conversion, [20][21][22][23][24] due to their excellent properties such as structural diversity, tunability and flexibility, and chemical tailorability. Moreover, atomically dispersed metal sites provide a versatile platform for the design and fabrication of MOF-based single-site catalysts, [25][26][27][28] holding tremendous potentials in the field of electrocatalysis from multiple perspectives: 1) abundant metal ions or clusters and ligands allow the design and synthesis of multifunctional MOFs for driving diverse reactions; 2) long-range ordered, tunable and accessible pores provide mass transport channels for the electrolytes or reactants; 3) the well-aligned assemblies of organic linkers and inorganic nodes render MOFs with distinct physiochemical properties unprecedented in conventional materials; 4) single active sites embedded in MOFs make it easier to tailor the electronic structures and investigate the catalytic mechanism.…”