A Turn-Off Fluorescent Sensor (Dy_1-xCe_x-BTC) for Detection of Acetaldehyde with High Sensitivity and Selectivity.

IF 2.6 4区化学 Q2 BIOCHEMICAL RESEARCH METHODS

Journal of Fluorescence Pub Date : 2025-03-11 DOI:10.1007/s10895-025-04242-w

Zitao Yan, Dachuan Zhu

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引用次数: 0

Abstract

A series of dual-lanthanide metal-organic frameworks (MOFs: Dy_1-xCe_x-BTC) have been successfully prepared by hydrothermal method using dysprosium (Dy³⁺) and cerium (Ce³⁺) ions as metal sources and 1,3,5-benzenetricarboxylic acid (H₃BTC) as organic ligand, confirmed by XRD patterns and FT-IR spectra, and then the luminescence property, the application in detecting small organic molecules and structural stability have been discussed. Among the samples, Dy_0.8Ce_0.2-BTC exhibited two strongest emission peaks located at 485 nm and 578 nm under the excitation at 295 nm, which are attributed to the excited electronic transitions of Dy³⁺ from ⁴F_9/2 to ⁶H_15/2 and ⁶H_13/2. However, Dy_0.8Ce_0.2-BTC immersed in the solution of acetaldehyde (AH) demonstrated an obvious luminescence quenching with the calculated quenching constant (K_sv) and the limit of detection (LOD) as 7.08 × 10³ M^-1, 5.36 × 10^-7 M and high selectivity among the other tested organic solvents. Meanwhile, it revealed that the MOF could maintain good microstructural and recycle stability in deionized water, indicating a great potential as a turn-off fluorescent sensor for AH detection. Besides, the luminescence quenching mechanism was deduced from competitive absorption.

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来源期刊

Journal of Fluorescence 化学-分析化学

CiteScore

4.60

自引率

7.40%

发文量

203

审稿时长

5.4 months

期刊介绍： Journal of Fluorescence is an international forum for the publication of peer-reviewed original articles that advance the practice of this established spectroscopic technique. Topics covered include advances in theory/and or data analysis, studies of the photophysics of aromatic molecules, solvent, and environmental effects, development of stationary or time-resolved measurements, advances in fluorescence microscopy, imaging, photobleaching/recovery measurements, and/or phosphorescence for studies of cell biology, chemical biology and the advanced uses of fluorescence in flow cytometry/analysis, immunology, high throughput screening/drug discovery, DNA sequencing/arrays, genomics and proteomics. Typical applications might include studies of macromolecular dynamics and conformation, intracellular chemistry, and gene expression. The journal also publishes papers that describe the synthesis and characterization of new fluorophores, particularly those displaying unique sensitivities and/or optical properties. In addition to original articles, the Journal also publishes reviews, rapid communications, short communications, letters to the editor, topical news articles, and technical and design notes.