Issue 5, 2024

Design and application of dual-emission metal–organic framework-based ratiometric fluorescence sensors

Abstract

Metal–organic frameworks (MOFs) are novel inorganic–organic hybridized crystals with a wide range of applications. In the last twenty years, fluorescence sensing based on MOFs has attracted much attention. MOFs can exhibit luminescence from metal nodes, ligands or introduced guests, which provides an excellent fluorescence response in sensing. However, single-signal emitting MOFs are susceptible to interference from concentration, environment, and excitation intensity, resulting in poor accuracy. To overcome the shortcomings, dual-emission MOF-based ratiometric fluorescence sensors have been proposed and rapidly developed. In this review, we first introduce the luminescence mechanisms, synthetic methods, and detection mechanisms of dual-emission MOFs, highlight the strategies for constructing ratiometric fluorescence sensors based on dual-emission MOFs, and classify them into three categories: intrinsic dual-emission and single-emission MOFs with luminescent guests, and non-emission MOFs with other luminescent materials. Then, we summarize the recent advances in dual-emission MOF-based ratiometric fluorescence sensors in various analytical industries. Finally, we discuss the current challenges and prospects for the future development of these sensors.

Graphical abstract: Design and application of dual-emission metal–organic framework-based ratiometric fluorescence sensors

Article information

Article type
Critical Review
Submitted
19 Dez 2023
Accepted
21 Jan 2024
First published
23 Jan 2024

Analyst, 2024,149, 1381-1397

Design and application of dual-emission metal–organic framework-based ratiometric fluorescence sensors

S. Zhang, J. Xiao, G. Zhong, T. Xu and X. Zhang, Analyst, 2024, 149, 1381 DOI: 10.1039/D3AN02187D

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