Induction of long-lived room temperature phosphorescence of carbon dots by water in hydrogen-bonded matrices.
Induction of long-lived room temperature phosphorescence of carbon dots by water in hydrogen-bonded matrices.
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DOI：
10.1038/s41467-018-03144-9
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发表时间：
2018-02-21
影响因子：
16.6
通讯作者：
Shi J
中科院分区：
文献类型：
--
作者：
Li Q;Zhou M;Yang M;Yang Q;Zhang Z;Shi J
磷光由于其长寿命的发光和高信噪比而在生物成像和离子检测中显示出巨大的应用潜力，但是在水环境中建立磷光发射仍然是一个挑战。在此，我们提出了一个通用的设计策略，有效地促进磷光，利用水分子之间的碳量子点（CD）和氰尿酸（CA）构建氢键网络。有趣的是，水分子不仅不引起磷光猝灭，而且大大增强磷光发射。这种增强行为可以解释的事实，即CA颗粒表面的高度有序的结合水可以构建强大的桥状氢键网络之间的CD和CA，这不仅有效地刚性化的CD的C=O键，但也大大提高了整个系统的刚性。此外，CD-CA悬浮液具有很高的磷光寿命（687 ms），并成功地应用于基于其可见磷光的离子检测。长的磷光寿命对于成像和检测是期望的，然而，磷光通常在限制应用的水性环境中被猝灭。在这里，Li等人提出了一种策略，由于多重氢键相互作用，
Phosphorescence shows great potential for application in bioimaging and ion detection because of its long-lived luminescence and high signal-to-noise ratio, but establishing phosphorescence emission in aqueous environments remains a challenge. Herein, we present a general design strategy that effectively promotes phosphorescence by utilising water molecules to construct hydrogen-bonded networks between carbon dots (CDs) and cyanuric acid (CA). Interestingly, water molecules not only cause no phosphorescence quenching but also greatly enhance the phosphorescence emission. This enhancement behaviour can be explained by the fact that the highly ordered bound water on the CA particle surface can construct robust bridge-like hydrogen-bonded networks between the CDs and CA, which not only effectively rigidifies the C=O bonds of the CDs but also greatly enhances the rigidity of the entire system. In addition, the CD-CA suspension exhibits a high phosphorescence lifetime (687 ms) and is successfully applied in ion detection based on its visible phosphorescence. A long phosphorescence lifetime is desirable for imaging and detection, however, phosphorescence is often quenched in aqueous environments limiting applications. Here, Li et al. present a strategy for the long-lived phosphorescence of carbon dots in water due to multiple hydrogen-bonding interactions
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影响因子：
15
作者：
Lee, Dongwook;Bolton, Onas;Kim, Jinsang
通讯作者：
Kim, Jinsang
影响因子：
16.6
作者：
Jiang, Kai;Zhang, Ling;Lin, Hengwei
通讯作者：
Lin, Hengwei
影响因子：
4.9
作者：
Deng, Yehao;Zhao, Dongxu;Shen, Dezhen
通讯作者：
Shen, Dezhen
影响因子：
8.6
作者：
Kwon, Woosung;Do, Sungan;Rhee, Shi-Woo
通讯作者：
Rhee, Shi-Woo
影响因子：
16.6
作者：
Kwon MS;Yu Y;Coburn C;Phillips AW;Chung K;Shanker A;Jung J;Kim G;Pipe K;Forrest SR;Youk JH;Gierschner J;Kim J
通讯作者：
Kim J