{"title":"Synthesis of CuInS<sub>2</sub> Quantum Dots Modified with Alanine for Sensitive and Selective Detection of Pb<sup>2+</sup> and Cysteine.","authors":"Zixuan Jia, Menghan Chen, Mohan Yang, Shenna Chen, Xuhong Zhang","doi":"10.1007/s10895-024-03947-8","DOIUrl":null,"url":null,"abstract":"<p><p>In this study, a novel fluorescent probe based on CuInS<sub>2</sub> quantum dots modified with alanine (Ala-CuInS<sub>2</sub> QDs) was developed for the detection of lead ions and cysteine (Pb<sup>2+</sup> and Cys). Ala-CuInS<sub>2</sub> QDs were synthesized through a one-step hydrothermal method exhibiting uniform size, good stability and water solubility. The QDs were then utilized as an \"on-off-on\" fluorescence sensor to detect Pb<sup>2+</sup> and Cys in the ranges of 0-20 µM and 0-55 µM respectively, with detection limits of 0.29 µM and 0.66 µM. The mechanism of fluorescence quenching and recovery processes was also explored. Furthermore, Ala-CuInS<sub>2</sub> QDs have been successfully applied to detect Pb<sup>2+</sup> in tap and river water and detect cysteine in serum.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Fluorescence","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1007/s10895-024-03947-8","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOCHEMICAL RESEARCH METHODS","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, a novel fluorescent probe based on CuInS2 quantum dots modified with alanine (Ala-CuInS2 QDs) was developed for the detection of lead ions and cysteine (Pb2+ and Cys). Ala-CuInS2 QDs were synthesized through a one-step hydrothermal method exhibiting uniform size, good stability and water solubility. The QDs were then utilized as an "on-off-on" fluorescence sensor to detect Pb2+ and Cys in the ranges of 0-20 µM and 0-55 µM respectively, with detection limits of 0.29 µM and 0.66 µM. The mechanism of fluorescence quenching and recovery processes was also explored. Furthermore, Ala-CuInS2 QDs have been successfully applied to detect Pb2+ in tap and river water and detect cysteine in serum.
期刊介绍：
Journal of Fluorescence is an international forum for the publication of peer-reviewed original articles that advance the practice of this established spectroscopic technique. Topics covered include advances in theory/and or data analysis, studies of the photophysics of aromatic molecules, solvent, and environmental effects, development of stationary or time-resolved measurements, advances in fluorescence microscopy, imaging, photobleaching/recovery measurements, and/or phosphorescence for studies of cell biology, chemical biology and the advanced uses of fluorescence in flow cytometry/analysis, immunology, high throughput screening/drug discovery, DNA sequencing/arrays, genomics and proteomics. Typical applications might include studies of macromolecular dynamics and conformation, intracellular chemistry, and gene expression. The journal also publishes papers that describe the synthesis and characterization of new fluorophores, particularly those displaying unique sensitivities and/or optical properties. In addition to original articles, the Journal also publishes reviews, rapid communications, short communications, letters to the editor, topical news articles, and technical and design notes.
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