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Dual-Mode Sensing Platform Based on Eu/Ag–Ca MOF for Cysteine Detection: Synergistic Enhancement of Fluorescence and Catalytic Activity by Ag+
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DOI：10.1021/acs.inorgchem.6c02786.png)
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Abstract
En 中文
Cysteine (Cys), an important sulfur-containing biomarker, is closely associated with various diseases, yet achieving selective recognition and multifunctional signal output within a single platform remains challenging. Herein, a site-selective coordination strategy is employed to construct a synergistic Eu/Ag–Ca metal–organic framework (MOF) by incorporating Eu3+ and Ag+ into a Ca-based framework. Ag+ enhances Eu3+ luminescence by modulating energy transfer, while simultaneously serving as catalytic active sites to impart oxidase-like activity and as specific recognition sites for Cys via strong thiol affinity. Based on these synergistic effects, a dual-mode fluorescence/colorimetric sensing platform is developed, enabling rapid, selective, and sensitive detection of Cys with cross-validated signals. Furthermore, integration into a hydrogel matrix combined with RGB analysis and logic gate design allows visual and quantitative evaluation of abnormal Cys levels. This work provides a rational strategy for constructing multifunctional MOF-based sensing systems.
Keywords:
Fluorescence
Ions
Metal organic frameworks
Monomers
Peptides and proteins
Journal
IF:
4.7
Papers:
4.9W
Citations:
10.5W
Organization
Cited Papers