“On-off-on” detection of Fe³⁺ and F⁻, biological imaging, and its logic gate operation based on excitation-independent blue-fluorescent carbon dots

Li, Lin, Shi, Lihong, Jia, Jing, Jiao, Yuan, Gao, Yifang, Liu, Yang, Dong, Chuan, and Shuang, Shaomin (2020) “On-off-on” detection of Fe³⁺ and F⁻, biological imaging, and its logic gate operation based on excitation-independent blue-fluorescent carbon dots. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 227. 117716.

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Abstract

A fluorescent nanoprobe based on carbon dots (CDs) has been facilely synthesized by a one-step hydrothermal pyrolysis of salicylic acid and utilized for the sequential detection of Fe3+ and F− in vitro. The fluorescence of CDs can be extinguished dramatically by Fe3+ based on static quenching and subsequently recovery upon addition of F− due to the formation of stabler FeF3. The probe exhibits high selectivity and sensitivity toward Fe3+ and F− with a good linearity in the range of 10–300 μM and 0.1–200 μM, respectively, and a low detection limit of 52 nM and 8.5 nM, respectively. More importantly, as-prepared CDs with exceedingly fluorescence stability, negligible toxicity and superior biocompatibility have been expanded for detection Fe3+ and F− in living cell and Escherichia coli. Furthermore, an “AND” logic gate based on as-obtained CDs has been constructed.

Item ID: 61271
Item Type: Article (Research - C1)
ISSN: 1386-1425
Keywords: carbon dots; Fe³⁺; F⁻;probe; imaging; logic gate
Copyright Information: © 2019 Elsevier B.V. All rights reserved.
Funders: National Natural Science Foundation of China (NNSF), Natural Science Foundation of Shanxi Province (NSFoSP)
Projects and Grants: NNSF No. 21874087, NNSF No. 21575084, NSFoSP 201701D121019
Date Deposited: 15 Jan 2020 00:17
FoR Codes: 03 CHEMICAL SCIENCES > 0301 Analytical Chemistry > 030101 Analytical Spectrometry @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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