Innovative engineering of red-emissive carbon dots for profoundly sensitive and recyclable determination of malachite green in fish tissue

IF 4.6 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-07-01 DOI:10.1016/j.saa.2025.126631

Yuan Jiao , Xuewen Miao , Xiaona Liu , Yifang Gao , Junmei Guo , Chao Liu , Lizhang Wang , Tianwei Qian , Xin Wang , Shasha Hong

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Abstract

Accurate measurement of hazardous synthetic dye is highly attractive for environmental and food safety inspection. Herein, red fluorescent carbon dots (R-CDs) are meticulously engineered by employing Azure A as a fluorophore to optimize the optical characteristics, thereby promoting high-efficiency fluorescence emission at 648 nm. The constructed R-CDs demonstrate excitation-independent characteristics remarkable photostability and superior water solubility. It is encouraging that the developed R-CDs demonstrate a specific response to MG, effectively differentiating it from other substances. The engineered R-CDs demonstrate concentration-responsive fluorescence quenching towards MG, exhibiting rapid response time with a well-defined linear detection range of 0.09–8.21 μM and ultralow detection limit of 24.2 nM. Furthermore, the spike recovery analysis of MG in fish tissue demonstrated robust performance with recoveries of 97.63–106.0 % (RSD <6.37 %), highlighting the analytical reliability for MG identification in aquatic products. The aforementioned results underscore the significant potential of the developed R-CDs for MG detection in aquatic products and bolster their application in food safety inspections.

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鱼组织中孔雀石绿红色碳点深敏可循环测定的创新工程

有害合成染料的准确测量对环境和食品安全检测具有重要意义。本文采用Azure A作为荧光团，精心设计红色荧光碳点（R-CDs），优化其光学特性，从而在648 nm处实现高效荧光发射。所构建的R-CDs具有不受激发的特性，具有良好的光稳定性和水溶性。令人鼓舞的是，开发的r - cd显示出对MG的特异性反应，有效地将其与其他物质区分开来。设计的R-CDs对MG具有浓度响应猝灭特性，响应时间短，线性检测范围为0.09 ~ 8.21 μM，超低检出限为24.2 nM。此外，鱼组织中MG的峰值回收率为97.63 ~ 106.0% (RSD < 6.37%)，显示了水产品中MG的分析可靠性。上述结果强调了所开发的r - cd在水产品中MG检测中的巨大潜力，并支持了其在食品安全检查中的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.