A novel ratiometric fluorescent probe for the detection of co-existing Fe3+ and Ag+ ions: characterization and mechanism exploration

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-03-20 DOI:10.1039/d5dt00012b

Qi Wu, Qianwei Wang, Jinhu Guo, Mengxuan Fang, Xinyu Yang, Yichong Cheng, Dalai Jin, Longcheng Wang

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Abstract

A novel white-light-emitting Ln-MOF composite, g-C₃N₄@TbEu(cpioa), was developed as a ratiometric fluorescent probe for the qualitative and quantitative analysis of metal ions. Among the tested ions, only Fe³⁺ and Ag⁺ exhibited distinct quenching behaviors. Mechanistic studies revealed that Fe³⁺ and Ag⁺ quench luminescence via dynamic and static processes, respectively, involving energy competitive absorption (ECA), photoinduced electron transfer (PET), Förster resonance energy transfer (FRET), and intramolecular weak interactions. The probe demonstrated high sensitivity with limits of detection (LOD) of 0.117 μM for Fe³⁺ and 0.383 μM for Ag⁺. Notably, the observable chromaticity variations enabled differentiation of co-existing Fe³⁺ and Ag⁺ in solutions—a first-reported achievement. Empirical equations derived from orthogonal experiments and multiple regression analysis validated the probe’s capability for dual-ion detection. This work pioneers the application of Ln-MOF-based probes in analyzing mixed analytes, offering significant potential for environmental monitoring, clinical diagnostics, and industrial applications.

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.