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Designing an intriguingly fluorescent N, B-doped carbon dots based fluorescent probe for selective detection of NO2- ions.

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Affiliations

  • 1. School of Chemical Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, Republic of Korea.
      Authors
    • Wang L 1
    • Jana J 1
    • Chung JS 1
    • Choi WM 1
    • Hur SH 1
    (5 authors)

ORCIDs linked to this article

Spectrochimica acta. Part A, Molecular and Biomolecular Spectroscopy, 23 Nov 2021, 268:120657
https://doi.org/10.1016/j.saa.2021.120657 PMID: 34862138 

Abstract 

Low-cost nitrogen and boron-doped carbon nanodots (CPAP-CDs) with a high quantum yield (64.07%) were synthesized through a facile hydrothermal treatment. The obtained CPAP-CDs exhibited wide absorption, strong fluorescence, and pH-dependent behavior. The high fluorescence of CPAP-CDs was quenching in the presence of the nitrite ion in a concentration-dependent manner. The detection limit was as low as 6.6 nM with a wide linear detection range of 2 μM - 1 mM. Diazotization between the NO2- ion and CPAP-CDs resulted in the aggregation of CPAP-CDs and aggregation-induced emission quenching. The as-designed method was tested further with different water samples, such as tap, drinking, and seawater.

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Read article at publisher's site: https://doi.org/10.1016/j.saa.2021.120657

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Funding 

Funders who supported this work.

Ministry of Environment (1)

Ministry of Science and ICT, South Korea

    National Research Foundation of Korea (1)