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One-Step Synthesis and Characterization of N-Doped Carbon Nanodots for Sensing in Organic Media

机译：用于有机介质中传感的N掺杂碳纳米点的一步合成与表征

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摘要

Photoluminescent nitrogen-doped carbon nanodots (N-doped CNDs) soluble in organic media are synthesized in a one-step synthesis from a single-source precursor (an amphiphilic polymer), which exhibits a very high quantum yield (QY = 78%), excitation wavelength-dependent emission, and upconversion emission properties. The evolution of N-doped CND formation is studied via ultraviolet-visible and photoluminescence spectroscopy. Their analytical application as an effective sensor for the direct determination of nitroaromatic explosives and byproducts is shown based on their selective response via a fluorescence quenching mechanism. The proposed method is validated in soil samples by directly using the sensor in organic media without any further treatment or additional functionalization, which is an interesting aspect for practical applications.
机译：从单源前体（两亲性聚合物）以一步合成法合成可溶于有机介质的光致发光氮掺杂碳纳米点（N掺杂的CND），其量子产率很高（QY = 78％），激发波长相关的发射和上转换发射特性。通过紫外可见光谱和光致发光光谱研究了N掺杂的CND形成的演化。基于它们通过荧光猝灭机理的选择性响应，显示了它们作为直接测定硝基芳族炸药和副产物的有效传感器的分析应用。通过直接在有机介质中使用传感器，无需任何进一步处理或附加功能化，即可在土壤样品中验证该方法的有效性，这对实际应用而言是一个有趣的方面。

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