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首页> 外文期刊>Chemistry: A European journal >Study on the Ultrahigh Quantum Yield of Fluorescent P,O-g-C3N4 Nanodots and its Application in Cell Imaging
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Study on the Ultrahigh Quantum Yield of Fluorescent P,O-g-C3N4 Nanodots and its Application in Cell Imaging

机译：P，O-g-C3N4荧光纳米粒子的超高量子产率研究及其在细胞成像中的应用

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摘要

Graphitic carbon nitride nanodots (g-C3N4 nanodots), as a new kind of heavy-metal-free quantum dots, have attracted considerable attention because of their unique physical and chemical properties. Although various methods to obtain g-C3N4 nanodots have been reported, it is still a challenge to synthesize g-C3N4 nanodots with ultrahigh fluorescence quantum yield (QY). In this study, highly fluorescent phosphorus/oxygen-doped graphitic carbon nitride (P,O-g-C3N4) nanodots were prepared by chemical oxidation and hydrothermal etching of bulk P-g-C3N4 derived from the pyrolysis of phytic acid and melamine. The as-prepared P,O-g-C3N4 nanodots showed strong blue fluorescence and a relatively high QY of up to 90.2 %, which can be ascribed to intrinsic phosphorus/oxygen-containing groups, and surface-oxidation-related fluorescence enhancement. In addition, the P,O-g-C3N4 nanodots were explored for cell imaging with excellent stability and biocompatibility, which suggest that they have great potential in biological applications.
机译：石墨化的氮化碳纳米点（g-C3N4纳米点）作为一种新型的不含重金属的量子点，由于其独特的物理和化学性质而受到了广泛的关注。尽管已经报道了获得g-C3N4纳米点的各种方法，但是合成具有超高荧光量子产率（QY）的g-C3N4纳米点仍然是一个挑战。在这项研究中，通过化学氧化和对植酸和三聚氰胺进行热解而得到的大量P-g-C3N4进行水热蚀刻，制备了高度荧光的磷/氧掺杂的石墨氮化碳（P，O-g-C3N4）纳米点。所制备的P，O-g-C3N4纳米点显示出较强的蓝色荧光和相对较高的QY，高达90.2％，这可以归因于固有的含磷/氧基团以及与表面氧化有关的荧光增强。此外，P，O-g-C3N4纳米点被探索用于细胞成像，具有出色的稳定性和生物相容性，这表明它们在生物学应用中具有巨大的潜力。

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