Journal
COORDINATION CHEMISTRY REVIEWS
Volume 404, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ccr.2019.213113
Keywords
Metal-organic frameworks; Dual-emission; Ratiometric fluorescence sensor; Design tactics
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Funding
- Independent Innovation Fund Project of Agricultural Science and Technology of Jiangsu Province in 2017 [CX (17) 1003]
- Guizhou Provincial Science and Technology Department Joint Fund Project (Qian Kehe LH word [2016]) [7076]
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Metal-organic frameworks (MOFs) are an important class of inorganic-organic hybrid crystals with applications in various fields. In last ten years, MOFs-based fluorescence sensing has gained much attention. MOFs can exhibit luminescence by metal nodes, ligands and the inserted or absorbed guests, which offer an excellent fluorescence response in analyzing. However, MOFs-based monochromatic fluorescence probes are limited by concentration, the effect of ambient and excitation light intensity, resulting in low detection accuracy. To overcome this defect, MOFs-based ratiometric fluorescence (RF) sensors have been proposed and rapidly developed. This review focuses on the design tactics of MOFs-based RF sensing and describes the detection mechanism of different RF sensors. Based on different strategies of synthesis, the MOFs-based RF sensors are categorized into three classes: MOFs' intrinsic dual-emission, single-emissive MOFs with a chromophore and non-emissive MOFs with two chromophores. In each categorization, the design approaches and relative merits were discussed separately. Finally, the applications of MOFs-based RF sensors are summarized and prospected. (C) 2019 Elsevier B.V. All rights reserved.
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