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首页> 外文期刊>RSC Advances >Dansyl-modified carbon dots with dual-emission for pH sensing, Fe3+ ion detection and fluorescent ink
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Dansyl-modified carbon dots with dual-emission for pH sensing, Fe3+ ion detection and fluorescent ink

机译：具有双发射的Danyl改性碳点，用于pH感测，Fe3 +离子检测和荧光墨水

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In this work, a multifunctional ratiometric fluorescence (FL) nanohybrid (CSCDs@DC) was synthesized from chitosan based carbon dots (CSCDs) and dansyl chloride (DC) at room temperature. The CSCDs@DC revealed strong FL intensity, great stability and excellent anti-photobleaching properties. Herein, CSCDs@DC was responsive to pH value in the range of 1.5–4.0 and exhibited color-switchable FL properties between acidic and alkaline environments. In addition, CSCDs@DC showed good selectivity and sensitivity towards Fe ~(3+) ions. A good linear relationship for the Fe ~(3+) ion detection was obtained in the range from 0 μM to 100 μM, with a detection limit of 1.23 μM. What's more, CSCDs@DC can be used as a fluorescent ink. It expressed superior optical properties after 3 months of storage or continuous exposure to UV light for 24 h. This study suggested that CSCDs@DC had potential in the detection of pH and metal ions, as well as showing promising application in the anti-counterfeiting field.
机译：在这项工作中，在室温下从壳聚糖基碳点（CSCD）和丹酰氯（DC）合成多官能测定荧光（FL）纳米冬次（CSCDS @ DC）。 CSCD @ DC揭示了强烈的强度，稳定性，优异的抗光漂白特性。在此，CSCDS @ DC响应于1.5-4.0的pH值，并且在酸性和碱性环境之间表现出可打开的可切换性。此外，CSCD @ DC对Fe〜（3+）离子的选择性良好和敏感性。在0μm至100μm的范围内获得Fe〜（3+）离子检测的良好线性关系，检测限为1.23μm。更重要的是，CSCD @ DC可用作荧光墨水。它在储存3个月后表达出色的光学性质或连续接触到紫外光24小时。该研究表明CSCDS @ DC在检测pH和金属离子的检测中具有潜力，以及在防伪场中显示有希望的应用。

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