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

Linlin Wang; Jayasmita Jana; Jin Suk Chung; Won Mook Choi; Seung Hyun Hur

doi:10.1016/j.saa.2021.120657

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

Spectrochim Acta A Mol Biomol Spectrosc. 2022 Mar 5:268:120657. doi: 10.1016/j.saa.2021.120657. Epub 2021 Nov 23.

Authors

Linlin Wang¹, Jayasmita Jana¹, Jin Suk Chung¹, Won Mook Choi², Seung Hyun Hur³

Affiliations

¹ School of Chemical Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, Republic of Korea.
² School of Chemical Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, Republic of Korea. Electronic address: wmchoi98@ulsan.ac.kr.
³ School of Chemical Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, Republic of Korea. Electronic address: shhur@ulsan.ac.kr.

PMID: 34862138
DOI: 10.1016/j.saa.2021.120657

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.

Keywords: Carbon dots; Diazotization; Fluorescence; Heteroatom; Nitrite ion.

MeSH terms

Carbon*
Fluorescent Dyes
Ions
Nitrogen
Nitrogen Dioxide
Quantum Dots*

Substances

Fluorescent Dyes
Ions
Carbon
Nitrogen
Nitrogen Dioxide