A portable test strip based on fluorescent europium-based metal–organic framework for rapid and visual detection of tetracycline in food samples

Pyrazine functionalization to boost the antenna effect in rare-earth metal–organic frameworks for tetracycline detection

“…Studies have shown that prevailing luminescence sensing mechanisms for MOF-based materials include fluorescence resonance energy transfer (FRET), photoinduced electron transfer (PET), structural conversion (SC), the internal filtration effect (IFE), chemical conversion (CC) and dynamic/static quenching (D/ SQ). 12,28,29,31 To better understand the luminescence quenching mechanism of JNU-206-Eu for TCs, combined experimental characterizations and theoretical calculations were carried out. Taking OTC as an example, PXRD patterns of JNU-206-Eu were measured to confirm the retention of its phase purity after being soaked in an aqueous solution of OTC for three days (Fig.…”

“…Currently, the testing of antibiotics is mainly done through high-performance liquid chromatography (HPLC), microbiological assay (MBA), gas-phase/liquid phase-mass spectrometry (GC/LC-MS) and immunoassay (IA), which are rather expensive and timeconsuming. [8][9][10][11][12] Thus, developing affordable testing tools for onsite real-time antibiotic detection is necessary and urgent.…”

An Adenine‐Based Biological Metal‐Organic Framework as an Efficient Luminescent Sensor for Tetracycline Detection

“…According to their respective concentration‐dependent emission spectra, the K sv values are calculated to be 1.92×10 4 M −1 for TC, 1.52×10 4 M −1 for OTC, and 1.80×10 4 M −1 for CTC, which indicates that TCAs all have a high quenching efficiency. Using the formula LOD=3δ/ K sv (δ=standard deviation of the blank experiment), the calculated LODs of JNU‐104 for TC, OTC, and CTC are 0.023, 0.029, and 0.024 μM, respectively, much better than most of the reported porous materials [11b,c,15] . To assess the sensing selectivity, the responses of JNU‐104 to other commonly used antibiotics such as chloramphenicol (CHL), griseofulvin (GRI), sulfamethazine (SMM), sulfathiazole (STZ), erythromycin (ERY), and vancomycin (VA) were also examined under the same conditions.…”

A red luminescent europium metal organic framework (Eu-MOF) integrated with a paper strip using smartphone visual detection for determination of folic acid in pharmaceutical formulations

“…MOFs are a relatively new class of chemical materials that show applications in biochemical sensors due to their advantages, including high surface area, variable pore sizes, high number of functional sites, high stability, and easy functionalization process. 52–59…”

“…[47][48][49][50][51] MOFs are a relatively new class of chemical materials that show applications in biochemical sensors due to their advantages, including high surface area, variable pore sizes, high number of functional sites, high stability, and easy functionalization process. [52][53][54][55][56][57][58][59] Smartphone detection integrated with fluorescent test paper is more interesting due to the low cost platform (paper), on site analysis, portability, and multi-functional targeted identification of analytes. 60 The cameras of smartphones can act as the main components that are essential for analytical signals by their controllable screen and signal input.…”