Lighting up the Electrochemiluminescence of Carbon Dots through Pre- and Post-Synthetic Design,Advanced Science

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Lighting up the Electrochemiluminescence of Carbon Dots through Pre- and Post-Synthetic Design
Advanced Science ( IF 14.3 ) Pub Date : 2021-05-11 , DOI: 10.1002/advs.202100125
Francesca Arcudi _{1,

2} , Luka Ðorđević _{1,

2} , Sara Rebeccani ₃ , Michele Cacioppo _{1,

4} , Alessandra Zanut _{3,

5} , Giovanni Valenti ₃ , Francesco Paolucci ₃ , Maurizio Prato _{1,

4,

6}

Affiliation

Carbon dots (CDs), defined by their size of less than 10 nm, are a class of photoluminescent (PL) and electrochemiluminescent (ECL) nanomaterials that include a variety of carbon-based nanoparticles. However, the control of their properties, especially ECL, remains elusive and afflicted by a series of problems. Here, the authors report CDs that display ECL in water via coreactant ECL, which is the dominant mechanism in biosensing applications. They take advantage of a multicomponent bottom-up approach for preparing and studying the luminescence properties of CDs doped with a dye acting as PL and ECL probe. The dependence of luminescence properties on the surface chemistry is further reported, by investigating the PL and ECL response of CDs with surfaces rich in primary, methylated, or propylated amino groups. While precursors that contribute to the core characterize the PL emission, the surface states influence the efficiency of the excitation-dependent PL emission. The ECL emission is influenced by surface states from the organic shell, but states of the core strongly interact with the surface, influencing the ECL efficiency. These findings offer a framework of pre- and post-synthetic design strategies to improve ECL emission properties, opening new opportunities for exploring biosensing applications of CDs.

中文翻译：

通过合成前和合成后设计点亮碳点的电化学发光

碳点 (CD) 的尺寸小于 10 nm，是一类光致发光 (PL) 和电化学发光 (ECL) 纳米材料，包括各种碳基纳米颗粒。然而，对其性能的控制，尤其是ECL，仍然难以捉摸，并受到一系列问题的困扰。在这里，作者报告了 CD 通过共反应物 ECL 在水中显示 ECL，这是生物传感应用中的主要机制。他们利用多组分自下而上的方法来制备和研究掺杂有充当 PL 和 ECL 探针的染料的 CD 的发光特性。通过研究表面富含伯氨基、甲基化或丙基化氨基的碳点的 PL 和 ECL 响应，进一步报道了发光特性对表面化学的依赖性。虽然对核心有贡献的前体表征了 PL 发射，但表面态影响了激发相关的 PL 发射的效率。ECL 发射受到有机壳表面态的影响，但核态与表面强烈相互作用，影响 ECL 效率。这些发现提供了合成前和合成后设计策略的框架，以改善 ECL 发射特性，为探索 CD 的生物传感应用开辟了新的机会。

更新日期：2021-07-07

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