Stable Europium(III) Metal–Organic Framework Demonstrating High Proton Conductivity and Fluorescence Detection of Tetracyclines

Inorganic Chemistry, Год журнала: 2023, Номер 62(30), С. 12001 - 12008

Опубликована: Июль 15, 2023

A europium(III) metal-organic framework (MOF), namely, {[[(CH3)2NH2]3Eu2(DTTP-2OH)2(HCOO)(H2O)]·4H2O}n (Eu-MOF, H4DTTP-2OH = 2',5'-dihydroxy-[1,1':4',1″-terphenyl]-3,3″,5,5″-tetracarboxylic acid) has been assembled through solvothermal method. The Eu-MOF is a three-dimensional (3D) (4,4,8)-connected topological with binuclear Eu(III) clusters as secondary building units, in which richly ordered hydrogen bonding network formed among the free H2O molecules, dimethylamine cations, and phenolic hydroxyl groups provides potential pathway for proton conduction. conductivity reaches category of superionic conductors (σ > 10-4 S cm-1) at room temperature maximum 1.91 × 10-3 cm-1 60 °C 98% RH. Moreover, it also can be used fluorescence sensor aqueous solution detection limits 0.14 μM tetracycline, 0.13 oxytetracycline 0.11 doxycycline. These results pave new methods constructing MOFs high responsive fluorescence.

Язык: Английский

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Bacterial Cellulose–Based MOF Hybrid as a Sensitive Switch Off–On Luminescent Sensor for the Selective Recognition of l-Histidine

Inorganic Chemistry, Год журнала: 2024, Номер 63(7), С. 3560 - 3571

Опубликована: Фев. 8, 2024

In this study, a stable and luminescent UiO-66-NH2 (UN) its derivative Cu2+@UN were prepared utilized successfully as an Off–On sensing platform for effective, selective, well rapid (5 min) detection of l-Histidine (l-His). The UN reveals efficient quenching in the presence Cu2+ ions through photoinduced electron transition (PET) mechanism dynamic process (in range 0.01–1 mM) forming platform. However, due to remarkable affinity between l-His Cu2+, luminescence is recovered indicating Turn-On behavior via quencher detachment (QD). A good linear relationship concentration intensity was observed 0.01–40 μM (R2 = 0.9978) with limit 7 nM sensing. suggested method determination real samples recoveries satisfying consequences. Moreover, result indicates that only induces significant restoration signal significantly greater than other amino acids. Also, portable test paper based on bacterial cellulose (BC) Cu2+@UNBC developed conveniently evaluate effective l-His.

Язык: Английский

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Zeolite-Like Ln-MOF Luminescent Nanosensor for Highly Efficient Detection of l-Noradrenaline

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(2), С. 1940 - 1949

Опубликована: Янв. 13, 2024

l-Noradrenaline (l-NE) is a neurotransmitter released by postganglionic neurons in the sympathetic nerve branch and stimulates secretion of l-NE human blood. Accurate monitoring concentration serum crucial for detecting stimulants preventing fraud competitive events. In this study, we introduce an approach detection using zeolite-like lanthanide metal–organic framework (Ln-MOF) named Eu0.479Tb0.521-ZMOF, constructed with H2bpdc ligand (where stands 2,2′-bipyridine-6,6′-dicarboxylate acid), forming nanorod. Notably, ratiometric luminescent probe Eu0.479Tb0.521-ZMOF showcases superior sensing performance compared to single emission based on Ln-MOF, enabling highly efficient among various antidepressant hormones. The limit (LOD) was 129 μM. Additionally, has been synthesized into nanorods, which promote effective solutions, exhibiting impressive recovery rate ranging from 97.5 100%. membrane, derived successfully developed utilized visual l-NE. conclusion, our study comprehensively elucidates detailed mechanism zeolite-Like Ln-MOFs Eu0.479Tb0.521-ZMOF.

Язык: Английский

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Achieving On–Off Ratiometric Luminescence Dynamics in a Nanoporous Eu(III) Metal–Organic Framework for Neopterin Detection

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(15), С. 17748 - 17758

Опубликована: Июль 30, 2024

Thanks to the superior photoluminescence performance of lanthanide(III) ions sensitized by organic ligands via an "antenna effect" and host–guest interactions between a MOF material targeted analytes, nanoporous can achieve luminescence dynamics through influence thus endowing with ratiometric sensing application. Consequently, 3D Eu(III) based material, {[Eu(BPDC)(μ3–OH)(H2O)]·H2O·DMF}n (Eu-MOF, 2,2′-bipyridine-4,4′-dicarboxylic acid = H2BPDC), assembled H2BPDC ligand Eu3+ for achieving on–off inflammatory marker neopterin (Neo) detection, has been fabricated. The Eu-MOF is consist 1D Eu(μ3–OH) chains, which could further be connected deprotonated build framework, showing nanosized aperture ca. 12.6 Å × along a-direction. titration experiments demonstrate that exhibit simultaneous behavior Neo, regulating interactions. More importantly, visible color change observation from red bluish violet naked eyes in response concentrations Neo indicator facile achieved luminescent test strips portable hydrogels. A combination competitive absorption contribute confirmed UV–vis spectral overlap experiment density functional theory calculations.

Язык: Английский

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Zirconium‐Based Metal–Organic Frameworks with Free Hydroxy Groups for Enhanced Perfluorooctanoic Acid Uptake in Water

Advanced Materials, Год журнала: 2024, Номер 36(33)

Опубликована: Июнь 19, 2024

Perfluorooctanoic acid (PFOA) is a highly recalcitrant organic pollutant, and its bioaccumulation severely endangers human health. While various methods are developed for PFOA removal, the targeted design of adsorbents with high efficiency reusability remains largely unexplored. Here rational synthesis two novel zirconium-based metal‒organic frameworks (MOFs) bearing free ortho-hydroxy sites, namely noninterpenetrated PCN-1001 twofold interpenetrated PCN-1002, presented. Single crystal analysis pure ligand reveals that intramolecular hydrogen bonding plays pivotal role in directing formation MOFs hydroxy groups. Furthermore, transformation from to PCN-1002 realized. Compared PCN-1001, displays higher chemical stability due interpenetration, thereby demonstrating an exceptional adsorption capacity up 632 mg g

Язык: Английский

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Engineering Helical Chirality in Metal-Coordinated Cyclodextrin Nanochannels

Journal of the American Chemical Society, Год журнала: 2025, Номер 147(9), С. 7325 - 7335

Опубликована: Фев. 18, 2025

Helicates are a defining element of DNAs and proteins, with functions that critical to variety biological processes. Cyclodextrins promising candidates for forging multiple-stranded helicates well-defined helicity, but lack available tools has precluded the construction artificial helical nanochannels controllable geometry helicity from these widely chiral building blocks. Herein, we disclose family Ag6L2 can be readily assembled α-cyclodextrin-derived ligands through coordination between pyridinyl groups Ag+ cations. We discovered exhibit either an M or P when cations adopt tetrahedral while losing most their linearly coordinated. Both precisely controlled by simply changing number methyl at ortho positions ligands. The tetracoordinated interconnect into infinite two-dimensional coordinative network characterized hexagonal tessellation. Theoretical calculations, which reveal lower energies conformations observed in crystals compared those inverted counterparts, support experimental results.

Язык: Английский

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Fluorinated LDHs for selective sorption of PFOS: Unveiling the roles of increased hydrophobicity and F-F interactions

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 131851 - 131851

Опубликована: Янв. 1, 2025

Язык: Английский

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Selective and Rapid Detection of 4-Nitrophenol in River and Treated Industrial Wastewater by a Luminescent Lanthanide Metal–Organic Framework Sensor

Inorganic Chemistry, Год журнала: 2023, Номер 62(48), С. 19565 - 19572

Опубликована: Ноя. 17, 2023

Phenolic organic compounds are widely used industrial chemicals that exist extensively in the environment and have a significant impact on human health. 4-Nitrophenol (4-NP) is typical phenolic compound found aqueous environments. Efficient detection of 4-NP wastewater highly challenging due to complexity testing environmental samples. Herein, luminescent lanthanide metal-organic framework (MOF) sensor based Eu3+ ion {[Eu(HL)(L)(H2O)]·2H2O}n (EuMOF; H2L = 5-(4H-1,2,4-triazol-4-yl)benzene-1,3-dicarboxylic acid) was successfully synthesized for efficient wastewater. Fluorescence sensing experiments revealed could greatly quench EuMOF fluorescence. Subsequently, applied distilled water, tap river treated wastewater, exhibiting high sensitivity, fast response within 30 s, selectivity, excellent reusability, low limit. Finally, fluorescence quenching mechanism explored attributed competitive absorption irradiated light between ligand.

Язык: Английский

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Gold nanoparticles embedded Fe-BTC (AuNPs@Fe-BTC) metal-organic framework as a fluorescence sensor for the selective detection of As(III) in contaminated waters

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Год журнала: 2023, Номер 302, С. 123104 - 123104

Опубликована: Июль 5, 2023

Язык: Английский

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Confinement of p‐Xylene in the Pores of a Bilanthanide Metal–Organic Framework for Highly Selective Recognition

Angewandte Chemie International Edition, Год журнала: 2023, Номер 63(6)

Опубликована: Дек. 13, 2023

The rapid and accurate sensing of p-xylene, an essential raw material with a multi-billion-dollar market, in xylene mixture is great significance industry; however, the highly similar molecular structures, energy levels, spectral characteristics isomers make selective recognition extremely challenging. Metal-organic frameworks (MOFs) exhibiting tailorable pores potential binding sites provide prospects for but comprehensive understanding pore effect still elusive, primarily due to intricacies involved process. Herein, we reported robust bilanthanide MOF NKU-999-EuTb precisely engineered accommodate which were confirmed by single crystal X-ray diffraction dynamic magnetic susceptibilities. exhibits high-performance p-xylene towards its isomers. Through systematical study, it was revealed that absorbing into governs performance. This work provides insights developing advanced materials complex

Язык: Английский

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