A Water‐Stable Uranyl Organic Framework as a Highly Selective and Sensitive Bifunctional Luminescent Probe for Fe³⁺ and Tetracycline Hydrochloride

Abstract

A new coordination polymer (H2bpy)0.5⋅[(UO2)1.5(ipa)2(H2O)] (1) (H2ipa=isophthalic acid, bpy=4,4′‐bipyridine) was synthesized by hydrothermal condition. It was characterized by IR spectroscopy, elemental analysis, TG‐DTA analysis, and powder X‐ray diffraction. Analysis of single‐crystal X‐ray diffraction results showed that the title compound exhibited a double chain bridged by the different uranyl ions and ipa2− ligands. Through the hydrogen bond interactions and π⋅⋅⋅π stacking interactions, the double chains were assembled into the three‐dimensional supramolecular framework. Furthermore, the compound can be used as a promising bifunctional luminescence sensor for detecting and identifying Fe3+ and tetracycline hydrochloride antibiotic molecules with high selectivity and sensitivity in aqueous solutions. Moreover, the luminescent sensing mechanisms for different analytes were proposed. Moreover, the electronic properties of title compound were explored by density functional theory (DFT) calculations. The sensor system has been successfully applied for the detection of Fe3+ and tetracycline hydrochloride with high recovery percentages and low relative standard deviation in real river water samples.

Two rare {M2(MoO4)2}n chain-containing molybdate-based metal–organic complexes with a bis-pyrazole-bis-amide ligand: fluorescent sensing and photocatalysis performance

“…and Cr 2 O 7 2À ions, and the quenching mechanism may be similar to those previous reports, 35,36 which was further conrmed by UV-vis spectra (Fig. S7 †).…”

Counterion-Controlled Formation of Layered Honeycomb and Polythreading Uranyl Networks and the Highly Sensitive and Selective Detection of Fe3+ in Aqueous Media

“…The selective detection toward Fe 3+ by metal–organic frameworks was mainly caused by the interaction between Fe 3+ and the active materials, such as cationic exchange or competing photon absorption between the MOF and the adsorbed ions. − Previous reports ,− have indicated that energy transfer may be a major reason for the quenching of metal ions. The UV/vis spectrum of Fe 3+ exhibited a broad adsorption band λ = 240–380 nm, which had a large overlap with the excitation spectrum of the compounds (Figure S8).…”

State of the art methods and challenges of luminescent metal–organic frameworks for antibiotic detection

“…So far, only one uranyl-based LMOF has been synthesized and utilized as a luminescence sensor in antibiotic detection. 107 An anion 2D layer of (H 2 bpy) 0.5 •[(UO 2 ) 1.5 ( 11a and b). The LOD of U-MOF toward THC was as low as 0.82 ppm, according to the detection limit formula.…”