The Role of Glutathione and Ethanol in Dictating the Emission Dynamics of Natural Resources‐Derived Highly Luminescent Carbon Nanodots
The Role of Glutathione and Ethanol in Dictating the Emission Dynamics of Natural Resources‐Derived Highly Luminescent Carbon Nanodots
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DOI：
10.1002/slct.201702455
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发表时间：
2017-12
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影响因子：
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通讯作者：
Akansh Nema;Rakshit Pareek;Tripti Rai;D. Panda
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文献类型：
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作者：
Akansh Nema;Rakshit Pareek;Tripti Rai;D. Panda
采用综合方法来解决碳纳米点（CND）中荧光动力学的有趣问题。在这篇文章中，我们通过采用快速且经济高效的方法，提供了两种不同类型的高发光 CND，它们源自自然资源和葡萄糖-胺-CTAB 反应。柠檬汁衍生的 CND（CND1）表现出与激发无关的发射，而另一种则表现出与激发相关的荧光；前者具有更多的纳米片状结构，而后者则表现出粒子行为。我们还提供了结论性证据，证明 CND 在水溶液中以聚集状态存在，并且存在高分子量结构，这与报道的观察结果相反。圆二色性研究表明 CND 中存在强大的氢键网络。实验结果的并置表明吡咯并吡啶型荧光团的存在。 CND 的温度依赖性发光特性本质上是高度可逆的，因此，合成的 CND 可以作为纳米温度计找到潜在的应用。 CND1 荧光特性的金属离子依赖性调节表明其在离子传感中的应用。
An integrative approach is adopted to address the intriguing aspect of fluorescence dynamics in carbon nanodots (CNDs). In this contribution, we offer two different types of highly luminescent CNDs derived from a natural‐resource and glucose‐amine‐CTAB reactions by employing fast and cost‐effective methods. Lemon‐juice derived CNDs (CND1) exhibit excitation‐independent emission, whereas the other one shows excitation‐dependent fluorescence; the former one possesses more of a nanosheet like structure whereas later exhibit particle behavior. We also provide conclusive evidence on the existence of the CNDs in a state of aggregation in aqueous solution and the presence of high molecular weight structure, contrary to reported observations. Circular dichroism studies suggest strong H‐bonding networks in CNDs. The juxtaposition of experimental findings indicates the presence of pyrrolopyridine‐type fluorophoric moiety. The temperature‐dependent luminescence properties of CNDs is highly reversible in nature therefore, synthesized CNDs can find potential application as nanothermometer. Metal‐ion dependent modulation of fluorescence properties of CND1 suggest its applications in ion‐sensing.