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A versatile platform for the highly efficient preparation of graphene quantum dots: photoluminescence emission and hydrophilicity–hydrophobicity regulation and organelle imaging†
Nanoscale ( IF 5.8 ) Pub Date : 2017-12-13 00:00:00 , DOI: 10.1039/c7nr08093j Xiaolong Wu 1, 2, 3, 4 , Liling Ma 1, 2, 3, 4 , Shan Sun 1, 2, 3, 4 , Kai Jiang 1, 2, 3, 4 , Ling Zhang 1, 2, 3, 4 , Yuhui Wang 1, 2, 3, 4 , Haibo Zeng 4, 5, 6, 7 , Hengwei Lin 1, 2, 3, 4
Nanoscale ( IF 5.8 ) Pub Date : 2017-12-13 00:00:00 , DOI: 10.1039/c7nr08093j Xiaolong Wu 1, 2, 3, 4 , Liling Ma 1, 2, 3, 4 , Shan Sun 1, 2, 3, 4 , Kai Jiang 1, 2, 3, 4 , Ling Zhang 1, 2, 3, 4 , Yuhui Wang 1, 2, 3, 4 , Haibo Zeng 4, 5, 6, 7 , Hengwei Lin 1, 2, 3, 4
Affiliation
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In this work, a versatile platform for the highly efficient preparation of graphene quantum dots (GQDs) with diverse properties was developed. First of all, an excess amount of oxidants and an additional high temperature step of the Hummers’ method for the synthesis of graphene oxide (GO) was applied to obtain nanosized graphene oxide (NGO). Then, high quality GQDs (quantum yields up to 18.2%) with different photoluminescence emission wavelengths, adjustable hydrophilicity–hydrophobicity, and selective cell organelle imaging capacity can be facilely achieved through a one-pot hydrothermal reaction between the NGO and ammonia, fatty primary amines, or amino-substituted organelle targetable compounds, respectively. The superior features of the as-developed method are extremely high conversion ratio (ca. 60 wt% from graphite to the functional GQDs) and great expandability. Such a high conversion ratio is deemed to be due to effectively decreasing aggregation of the NGO (in comparison with GO) during the post-treatment process. This work provides a robust strategy for the highly efficient preparation of GQDs with diverse properties and functions, and is believed to be beneficial for boosting their applications in the future.
中文翻译：
高效制备石墨烯量子点的多功能平台：光致发光发射和亲水性-疏水性调节以及细胞器成像†
在这项工作中，开发了用于高效制备具有各种特性的石墨烯量子点（GQD）的通用平台。首先，使用过量的氧化剂和悍马合成氧化石墨烯（GO）的方法的额外高温步骤，以获得纳米尺寸的氧化石墨烯（NGO）。然后，可以通过NGO与氨，脂肪伯胺之间的一锅水热反应，轻松实现具有不同光致发光发射波长，可调节的亲水性-疏水性和选择性细胞器成像能力的高质量GQD（量子产率高达18.2％）。或氨基取代的细胞器可靶向化合物。所开发方法的优越之处在于极高的转化率（ca。从石墨到功能GQD的重量百分比为60％）和良好的可扩展性。这样高的转化率被认为是由于在后处理过程中有效减少了NGO的聚集（与GO相比）。这项工作为高效制备具有多种特性和功能的GQD提供了可靠的策略，并被认为有利于将来促进其应用。
更新日期：2017-12-13
中文翻译：
高效制备石墨烯量子点的多功能平台：光致发光发射和亲水性-疏水性调节以及细胞器成像†
在这项工作中，开发了用于高效制备具有各种特性的石墨烯量子点（GQD）的通用平台。首先，使用过量的氧化剂和悍马合成氧化石墨烯（GO）的方法的额外高温步骤，以获得纳米尺寸的氧化石墨烯（NGO）。然后，可以通过NGO与氨，脂肪伯胺之间的一锅水热反应，轻松实现具有不同光致发光发射波长，可调节的亲水性-疏水性和选择性细胞器成像能力的高质量GQD（量子产率高达18.2％）。或氨基取代的细胞器可靶向化合物。所开发方法的优越之处在于极高的转化率（ca。从石墨到功能GQD的重量百分比为60％）和良好的可扩展性。这样高的转化率被认为是由于在后处理过程中有效减少了NGO的聚集（与GO相比）。这项工作为高效制备具有多种特性和功能的GQD提供了可靠的策略，并被认为有利于将来促进其应用。
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