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Fluorescent probe based on hydrogel-immobilized carbon dots complex with temperature-trigger for ferric iron detection

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Abstract

A novel fluorescent probe based on poly(N-isopropyl acrylamide) (p(NIPAAm-co-AAm)) immobilized carbon dots@SiO2 nanoparticles complex was synthesized for ferric iron detection through the chemical crosslinking methods, in which carbon dots@SiO2 nanoparticles complex was characterized by field emission scanning electron microscope, Fourier transform infrared spectroscopy, Ultraviolet–visible spectrophotometer and fluorescence spectrophotometer, respectively. The fluorescence quenching between p(NIPAAm-co-AAm)-CQDs and ferric iron were able to be controlled at different temperatures based on the swelling and shrinking of p(NIPAAm-co-AAm) through changing the temperature, which the principle of the probe was analyzed. The fluorescent probe could detect the ferric iron with a good linear relationship in the range of concentration from 0 to 50 μM and the limit of detection was 0.48 μM at 25 °C.

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The data of this study are available from the corresponding author.

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Acknowledgements

The authors would like to thank Shiyanjia Lab (www.shiyanjia.com) for the FTIR, SEM and AFM measurements.

Funding

This work is supported by Financial Support from Key Technology R&D Program of Shandong Province (2022CXPT052).

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Authors and Affiliations

  1. Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Marine Monitoring Instrument Equipment Technology, National Engineering and Technological Research Center of Marine Monitoring Equipment, 37 Miaoling Road, Qingdao, 266061, People’s Republic of China

    Haitao Lin, Zike Jiang, Jing Wang, Tao Wang & Zhu Hao

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  1. Haitao Lin
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  4. Tao Wang
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Correspondence to Haitao Lin or Zike Jiang.

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Lin, H., Jiang, Z., Wang, J. et al. Fluorescent probe based on hydrogel-immobilized carbon dots complex with temperature-trigger for ferric iron detection. J Mater Sci 58, 7602–7612 (2023). https://doi.org/10.1007/s10853-023-08510-7

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