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Sensing performance and mechanism of carbon dots encapsulated into metal–organic frameworks

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Abstract

Metal–organic frameworks (MOFs) can be combined with nanomaterials and the combined composites have excellent optical properties. Carbon dots (CDs) with tiny particle size, non-toxic and rich surface functional groups are novel fluorescent materials. Carbon dots@metal–organic frameworks (CDs@MOFs) are synthesized by encapsulating CDs into MOFs. CDs@MOFs are promising composites for the preparation of a new generation of fluorescence sensors, which combine the hybrid properties of MOFs and the special optical properties of CDs. Urged as such, we are encouraged to categorize according to the sensing mechanisms. These include fluorescence resonance energy transfer (FRET), aggregation-caused quenching (ACQ), static quenching, dynamic quenching, photo-induced electron transfer (PET), inner filter effect (IFE) and so on. Based on the above mechanisms, CDs@MOFs can specifically interact with target analytes to generate fluorescence quenching. This review covers the research progress of CDs@MOFs in recent five years (with 103 refs), synthetic design of CDs@MOFs and introduces the sensing mechanism. The current challenges and future research directions are discussed briefly.

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The sensing mechanism and applications of CDs@MOFs

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Acknowledgements

We would like to thank the Analytical & Testing Center of Tiangong University for work.

Funding

The work was supported by the National Natural Science Foundation of China (51678409), Tianjin Research Program of Application Foundation and Advanced Technology of China (19JCYBJC19800), State Key Laboratory of Separation Membranes and Membrane Processes (Z1-201507), and the Program for Innovative Research Team in University of Tianjin (TD13-5042).

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Authors and Affiliations

  1. State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research On Separation Membranes, School of Chemical Engineering and Technology, Tiangong University, Tianjin, 300387, People’s Republic of China

    Fanyong Yan, Xiule Wang, Yao Wang & Chunhui Yi

  2. State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research On Separation Membranes, School of Chemistry, Tiangong University, Tianjin, 300387, People’s Republic of China

    Ming Xu & Jinxia Xu

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  1. Fanyong Yan
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  2. Xiule Wang
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  3. Yao Wang
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  4. Chunhui Yi
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  5. Ming Xu
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Correspondence to Fanyong Yan.

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Yan, F., Wang, X., Wang, Y. et al. Sensing performance and mechanism of carbon dots encapsulated into metal–organic frameworks. Microchim Acta 189, 379 (2022). https://doi.org/10.1007/s00604-022-05481-5

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