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Journal of Analytical Methods in Chemistry

Journal of Analytical Methods in Chemistry

IF: 2.29
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Preparation of One-Emission Nitrogen-Fluorine-Doped Carbon Quantum Dots and Their Applications in Environmental Water Samples and Living Cells for ClO- Detection and Imaging.

Published:1 January 2023 DOI: 10.1155/2023/7515979 PMID: 37144174
Qianchun Zhang, Haijiang Du, Siqi Xie, Fengling Tian, Xixi Long, Shan Liu, Yun Wu

Abstract

Hypochlorite (ClO-) has received extensive attention owing to its significant roles in the immune defense and pathogenesis of numerous diseases. However, excessive or misplaced production of ClO- may pose certain diseases. Thus, to determine its biological functions in depth, ClO- should be tested in biosystems. In this study, a facile, one-pot synthesis of nitrogen-fluorine-doped carbon quantum dots (N, F-CDs) was developed using ammonium citrate tribasic, L-alanine, and ammonium fluoride as raw materials under hydrothermal conditions. The prepared N, F-CDs demonstrate not only strong blue fluorescence emission with a high fluorescence quantum yield (26.3%) but also a small particle size of approximately 2.9?nm, as well as excellent water solubility and biocompatibility. Meanwhile, the as-prepared N, F-CDs exhibit good performance in the highly selective and sensitive detection of ClO-. Thus, a wide concentration response range of 0-600?μM with a low limit of detection (0.75?μM) was favorably obtained for the N, F-CDs. Based on the excellent fluorescence stability, excellent water solubility, and low cell toxicity, the practicality and viability of the fluorescent composites were also successfully verified via detecting ClO- in water samples and living RAW 264.7 cells. The proposed probe is expected to provide a new approach for detecting ClO- in other organelles.

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