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

Abstract

L-Noradrenaline (L-NE) is a neurotransmitter released by postganglionic neurons in the sympathetic nerve branch and stimulates the secretion of L-NE in human blood. Accurate monitoring of the L-NE concentration in serum is crucial for detecting stimulants and preventing fraud in competitive events. In this study, we introduce an approach for the detection of L-NE using a zeolite-like lanthanide metal−organic framework (Ln-MOF) named Eu 0.479 Tb 0.521 -ZMOF, constructed with a H 2 bpdc ligand (where H 2 bpdc stands for 2,2′-bipyridine-6,6′-dicarboxylate acid), and forming a nanorod. Notably, the ratiometric luminescent probe Eu 0.479 Tb 0.521 -ZMOF showcases superior sensing performance compared to single emission based on Ln-MOF, enabling highly efficient detection of L-NE among various antidepressant hormones. The limit of detection (LOD) for L-NE was 129 μM. Additionally, Eu 0.479 Tb 0.521 -ZMOF has been synthesized into nanorods, which promote effective detection of L-NE in human serum solutions, exhibiting an impressive recovery rate ranging from 97.5 to 100%. Additionally, a luminescent membrane, derived from Eu 0.479 Tb 0.521 -ZMOF, was successfully developed and utilized for visual detection of L-NE. In conclusion, our study comprehensively elucidates the detailed detection mechanism for L-NE based on zeolite-Like Ln-MOFs Eu 0.479 Tb 0.521 -ZMOF.

Few-mode optical fiber-based flexible pressure feedback tentacle doped with fluorescence temperature pointer

“…Traditional dual-devices integration on fiber methods for temperature compensation increase the complexity of demodulation devices [13][14][15]. Fiber optic fluorescence temperature sensing technology combines fluorescent substances such as Ln-MOFs [16,17], perovskite quantum dots [18,19], and rare earth metal ions [20,21] with optical fibers to construct a detection probe that utilizes fluorescence temperature correlation changes such as luminescence intensity [22,23], fluorescence lifetime [24,25], peak wavelength, etc [26][27][28]. Among them, fluorescence intensity is the most intuitive detection signal.…”