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棕糖介导的碳量子点作为一种新型荧光传感器，用于庆大霉素的灵敏检测及其在食品中的应用。

The Brown Sugar Mediated Carbon Quantum Dots as a Novel Fluorescence Sensor for Sensitive Detection of Gentamicin and Its Application in Foods.

机构信息

Institute of Pharmaceutical Analysis, School of Pharmacy, Lanzhou University, Lanzhou 730030, China.

出版信息

Int J Mol Sci. 2024 Feb 10;25(4):2143. doi: 10.3390/ijms25042143.

DOI:10.3390/ijms25042143
PMID:38396819
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10889699/
Abstract

In this work, a novel fluorescence sensing strategy was proposed for the detection of gentamicin based on fluorescent carbon quantum dots (CQDs) and gold nanoparticles (AuNPs). Herein, the CQDs were green-synthesized for the first time via a one-step hydrothermal method utilizing brown sugar as the precursor. In the presence of citrate-stabilized AuNPs, the fluorescence of CQDs was quenched efficiently. Gentamicin, on the other hand, had a higher affinity for AuNPs and was able to compete with CQDs for a preferential binding to AuNPs, which ultimately led to the aggregation of AuNPs and freeing of CQDs in solution, causing the fluorescence recovery of CQDs. Based on the above phenomenon, the concentrations of gentamicin could be ascertained by detecting the variations in fluorescence intensity of CQDs. This sensing strategy exhibited excellent selectivity in various antibiotics. At the same time, the method displayed outstanding sensitivity for gentamicin, which was successfully applied to real samples detection.

摘要

在这项工作中，提出了一种基于荧光碳量子点（CQDs）和金纳米粒子（AuNPs）的新的荧光传感策略来检测庆大霉素。本文首次通过一步水热法利用红糖作为前体制备了绿色 CQDs。在柠檬酸稳定的 AuNPs 的存在下，CQDs 的荧光被有效地猝灭。另一方面，庆大霉素对 AuNPs 具有更高的亲和力，并且能够与 CQDs 竞争优先结合 AuNPs，这最终导致 AuNPs 的聚集和溶液中 CQDs 的释放，导致 CQDs 的荧光恢复。基于上述现象，可以通过检测 CQDs 荧光强度的变化来确定庆大霉素的浓度。该传感策略在各种抗生素中表现出优异的选择性。同时，该方法对庆大霉素表现出优异的灵敏度，成功应用于实际样品的检测。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/76c7f5eaf725/ijms-25-02143-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/33652a47d67c/ijms-25-02143-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/17d2d994eb3b/ijms-25-02143-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/ceed75eabb01/ijms-25-02143-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/c2a1b047bdf5/ijms-25-02143-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/bb14d2b66bee/ijms-25-02143-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/8d945c5e353d/ijms-25-02143-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/8dac551d71e0/ijms-25-02143-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/5f358ab33aa7/ijms-25-02143-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/bb7d8210aa62/ijms-25-02143-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/0b847dd4f672/ijms-25-02143-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/b39f36799001/ijms-25-02143-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/188ef57eadeb/ijms-25-02143-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/620b51d9735b/ijms-25-02143-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/76c7f5eaf725/ijms-25-02143-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/33652a47d67c/ijms-25-02143-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/17d2d994eb3b/ijms-25-02143-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/ceed75eabb01/ijms-25-02143-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/c2a1b047bdf5/ijms-25-02143-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/bb14d2b66bee/ijms-25-02143-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/8d945c5e353d/ijms-25-02143-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/8dac551d71e0/ijms-25-02143-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/5f358ab33aa7/ijms-25-02143-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/bb7d8210aa62/ijms-25-02143-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/0b847dd4f672/ijms-25-02143-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/b39f36799001/ijms-25-02143-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/188ef57eadeb/ijms-25-02143-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/620b51d9735b/ijms-25-02143-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6c4b/10889699/76c7f5eaf725/ijms-25-02143-g014.jpg

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Investigation into Red Emission and Its Applications: Solvatochromic N-Doped Red Emissive Carbon Dots with Solvent Polarity Sensing and Solid-State Fluorescent Nanocomposite Thin Films.

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J Mater Chem B. 2015-9-21

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