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首页> 外文期刊>RSC Advances >A novel method for the preparation of solvent-free, microwave-assisted and nitrogen-doped carbon dots as fluorescent probes for chromium(vi) detection and bioimaging
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A novel method for the preparation of solvent-free, microwave-assisted and nitrogen-doped carbon dots as fluorescent probes for chromium(vi) detection and bioimaging

机译：一种制备无溶剂，微波辅助和氮掺杂碳点作为铬（VI）检测和生物分析的荧光探针的新方法

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摘要

Chromium(VI) [Cr(VI)] has been shown to be toxic to organisms due to its mutagenicity and carcinogenicity. Therefore, the exploitation of probes with low toxicity and high sensitivity for Cr(VI) detection is needed. In this study, a one-step, solvent-free, and microwave-assisted method was developed for the preparation of nitrogen-doped carbon dots (N-CDs). The reaction could be finished in just three minutes, and the yield of the dots could reach 58.5%; the as-prepared N-CDs exhibited excellent water solubility, emitted bright cyan fluorescence with a high quantum yield of 38.88%, and possessed excitation-and concentration-dependent characteristics. The N-CDs could be effectively applied to Cr(VI) detection with a linear range of 1-100 mu M, and the detection limit could be as low as 0.12 mu M. The quenching mechanism was responsible for the inner filter effect, and the quenched fluorescence could be recovered with a linear range of 5-100 mu M by the addition of ascorbic acid. We showed that the fluorescent probes could even be employed for the detection of Cr(VI) in river water and for bio-imaging because of their nearly zero cytotoxicity; this showed the potential application of these probes in ion detection and cellular bioimaging. Herein, we have provided an effective strategy to rapidly obtain high-quality N-CDs using a solid-phase microwave method, and the as-prepared N-CDs exhibit various potential applications in environmental and biological fields.
机译：铬（VI）[Cr（VI）]由于其致突变性和致癌性而被证明对生物体有毒。因此，需要对CR（VI）检测具有低毒性和高灵敏度的探针的利用。在该研究中，开发了一种单步，无溶剂和微波辅助方法，用于制备氮掺杂的碳点（N-CD）。反应可以在仅仅三分钟内完成，并且点的产率可达到58.5％;制备的N-CD具有优异的水溶解度，亮的青色荧光，具有38.88％的量高，具有浓缩 - 依赖性特性。可以有效地将N-CDS检测有效地应用于1-100μm的线性范围，并且检测极限可以低至0.12μm。淬火机构负责内部滤波器效果，和通过加入抗坏血酸，可以用线性范围为5-100μm的线性范围回收骤冷的荧光。我们表明，由于其几乎零细胞毒性，甚至可以用于检测河水中的Cr（vi）和生物成像的荧光探针。这表明这些探针在离子检测和细胞生物分析中的潜在应用。在此，我们提供了使用固相微波方法快速获得高质量N-CD的有效策略，并且制备的N-CD在环境和生物领域表现出各种潜在的应用。

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  • 来源
    《RSC Advances》 |2019年第15期|共9页
  • 作者

    Cao Meng; Li Yong; Zhao Yunze; Shen Chongyang; Zhang Hongyan; Huang Yuanfang;

  • 作者单位

    China Agr Univ Coll Resources &

    Environm Sci Beijing 100193 Peoples R China;

    China Agr Univ Coll Resources &

    Environm Sci Beijing 100193 Peoples R China;

    China Agr Univ Coll Resources &

    Environm Sci Beijing 100193 Peoples R China;

    China Agr Univ Coll Resources &

    Environm Sci Beijing 100193 Peoples R China;

    China Agr Univ Coll Sci Beijing 100193 Peoples R China;

    China Agr Univ Coll Resources &

    Environm Sci Beijing 100193 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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