Photoluminescence effects of graphitic core size and surface functional groups in carbon dots: COO- induced red-shift emission
Photoluminescence effects of graphitic core size and surface functional groups in carbon dots: COO- induced red-shift emission
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DOI：
10.1016/j.carbon.2014.01.008
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发表时间：
2014-04-01
期刊：
影响因子：
10.9
通讯作者：
Zboril, Radek
中科院分区：
文献类型：
--
作者：
Hola, Katerina;Bourlinos, Athanasios B.;Zboril, Radek
我们提出了一种简单的分子方法来控制亲脂性。基于没食子酸烷基酯前体热解的光致发光碳量子点（CD）的亲水性。根据所使用的没食子酸衍生物，表面上具有不同烷基（甲基、丙基、月桂基）的CD可以通过在270摄氏度下等温加热来获得。这种衍生的方法不仅允许亲脂性的控制，而且特定烷基链的长度使得能够控制所制备的CD的尺寸和光致发光（PL）。此外，CD表面上的烷基链可以通过温和的碱水解容易地转化为羧酸酯基团，以获得具有记录的生物相容性的水分散性CD。CD和时间分辨的PL数据，包括碳核和表面官能团的贡献，观察到的PL特性的差异，合理化和详细讨论使用含时密度泛函理论（TD-DFT）计算。(C)2014爱思唯尔有限公司版权所有。
We present a simple molecular approach to control the lipophilic./hydrophilic nature of photoluminescent carbon dots (CDs) based on pyrolysis of alkyl gallate precursors. Depending on the gallic acid derivative used, CDs with different alkyl groups (methyl, propyl, lauryl) on the surface can be obtained by isothermal heating at 270 degrees C. This precursor-derived approach allows not only the control of lipophilicity but also the length of the particular alkyl chain enables the control over both the size and photoluminescence (PL) of the prepared CDs. Moreover, the alkyl chains on the CDs surface can be readily converted to carboxylate groups via a mild base hydrolysis to obtain water dispersible CD with a record biocompatibility. The observed differences in PL properties of CDs and time-resolved PL data, including contributions from carbogenic cores and surface functional group, are rationalized and discussed in detail using time-dependent density functional theory (TD-DFT) calculations. (C) 2014 Elsevier Ltd. All rights reserved.