One-Step Synthesis and Characterization of N-Doped Carbon Nanodots for Sensing in Organic Media
One-Step Synthesis and Characterization of N-Doped Carbon Nanodots for Sensing in Organic Media
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DOI：
10.1021/acs.analchem.5b04523
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发表时间：
2016-03-15
影响因子：
7.4
通讯作者：
Valcarcel, Miguel
中科院分区：
文献类型：
--
作者：
Cayuela, Angelina;Carrillo-Carrion, Carolina;Valcarcel, Miguel
可溶于有机介质中的光致发光氮掺杂碳纳米点（N-掺杂CND）是由单源前体（两亲聚合物）在一步合成中合成的，其表现出非常高的量子产率（QY = 78%）、激发波长依赖性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CND形成的演变。它们的分析应用作为一个有效的传感器，用于直接测定硝基芳香族炸药和副产物的基础上，通过荧光猝灭机制的选择性响应。所提出的方法在土壤样品中进行了验证，直接使用传感器在有机介质中没有任何进一步的处理或额外的功能化，这是一个有趣的方面，为实际应用。
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.