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An Ultra-low Detection Limit Fe3+ Optical Fiber Fluorescent Sensor Based on a Anti-B18H22 Derivative with Aggregation-induced Emission Enhancement

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Abstract

A fluorescent Fe3+ probe ((C10H7NO2)2B18H20, M1) by introducing two isoquinoline-1-carboxylic acid group into the 6,9-position of anti-B18H22 was designed and synthesized. The structure of M1 was investigated by 1H NMR, MS, FT-IR and theoretical calculation, and its optical properties were characterized with UV–Vis and PL. M1 showed aggregation induced emission enhancement (AIEE) properties in THF/H2O solution, and exhibited an excellent selectivity toward Fe3+ in THF/H2O (v/v, ƒw = 95%) solution with a detection limit of 1.93 × 10–5 M. The interaction mechanism of probe for detecting Fe3+ is attributed to the involvement of intramolecular charge transfer (ICT) process. Furthermore, a optical fiber fluorescent Fe3+ sensor based on M1 sensing film was developed, the detection limit of the optical fiber Fe3+ fluorescent sensor could be improved to13.8 pM, the ultra-low detection limit is superior to most reported fluorescent probes (or sensors) towards Fe3+. This method has the advantages of high sensitivity, anti-interference and easy to operate, and has great potential in the field of the analysis of environmental and biological samples.

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Data Availability

The data that support the findings of this study are available on request from the corresponding author.

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Authors and Affiliations

  1. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, 510006, China

    Yong Zheng, Yulian Zheng, Yimei Zhang, Hongyun Meng & Chunhua Tan

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  1. Yong Zheng
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  2. Yulian Zheng
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  3. Yimei Zhang
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  4. Hongyun Meng
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  5. Chunhua Tan
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Contributions

Author contribution statement Yong Zheng: Conceptualization, Methodology, Validation, Formal analysis, Investigation, Data curation, Writing – original draft, Writing – review & editing, Visualization, Project administration. Yulian Zheng: Conceptualization, Methodology, Software, Validation, Formal analysis, Investigation, Writing – review & editing, Visualization. Yimei Zhang: Validation, Software. Hongyun Meng: Conceptualization, Methodology, Formal analysis, Resources, Writing – review & editing, Visualization, Supervision, Project administration, Funding acquisition. ChunHua Tan: Methodology, Resources, Writing - review & editing, Supervision, Project administration, Funding acquisition.

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Correspondence to Chunhua Tan.

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Zheng, Y., Zheng, Y., Zhang, Y. et al. An Ultra-low Detection Limit Fe3+ Optical Fiber Fluorescent Sensor Based on a Anti-B18H22 Derivative with Aggregation-induced Emission Enhancement. J Fluoresc (2024). https://doi.org/10.1007/s10895-023-03550-3

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