Green synthesis of fluorescent carbon dots from Hongcaitai for selective detection of hypochlorite and mercuric ions and cell imaging
Green synthesis of fluorescent carbon dots from Hongcaitai for selective detection of hypochlorite and mercuric ions and cell imaging
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红彩泰荧光碳点的绿色合成用于选择性检测次氯酸根和汞离子及细胞成像
DOI：
10.1016/j.snb.2018.02.141
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发表时间：
2018-06-15
影响因子：
8.4
通讯作者：
Xu, Li
中科院分区：
文献类型：
--
作者：
Li, Lu-Shuang;Jiao, Xin-Yue;Xu, Li
天然碳源是制备碳量子点（CD）的有效碳前驱体，具有突出的物理化学和光致发光特性。为了丰富光盘的类型和扩大其应用，需要更多的天然来源。红菜苔（Brassica compestris L.）变种以湖北省最受欢迎、价格低廉的蔬菜--紫花苜蓿（purpurea Bailey）为碳前驱体，采用水热法合成了碳纳米管。基于在乙醇中的不同溶解度，将获得的CD分为两部分，CD-A（乙醇可溶）和CD-B（乙醇不溶）。两种CD均具有多功能性，但CD-B中含有硫元素，CD-A中不含硫元素。在CIO-和Hg ~（2+）存在下，两种CD均发生荧光猝灭。CDs-A对ClO-较敏感，而CDs-B对Hg-2+较敏感。因此，CDs-A成功地测定了自来水中的CIO-，检测限为0.015 μ M。用该方法测定河水中的Hg ~（2+），检出限为0.06 μ M。结果表明，通过细微的不同性质（例如乙醇溶解度）对CD进行亚分类对于CD的更好应用性能是必要的。此外，由于它们的低毒性，两种CD都适用于HepG 2细胞上的细胞标记。(C)2018 Elsevier B. V.版权所有。
Natural source is an effective carbon precursor to produce carbon dots (CDs) with prominent physicochemical and photoluminescent properties. To enrich the CDs' type and widen their applications, more natural sources are desired. Herein, Hongcaitai (Brassica compestris L. var. purpurea Bailey), one of the popular and cheap vegetables in Hubei province of China, was attempted as the carbon precursor for synthesis of CDs by hydrothermal method. The obtained CDs were divided into two parts based on different solubilities in ethanol, CDs-A (ethanol soluble) and CDs-B (ethanol insoluble). Both CDs possessed multi functionalities; however, CDs-B contained sulfur element while CDs-A did not. Fluorescence quenching occured for both CDs in the presence of CIO- and Hg2+. However, CDs-A were more sensitive towards CIO-, while CDs-B were more sensitive towards Hg-2+. Thus, CDs-A were successful to determine CIO- in tap water with limit of detection at 0.015 mu M. CDs-B were successful to determine Hg2+ in river water with limit of detection at 0.06 mu M. The results demonstrate that the sub-classfication of CDs by the subtle different properties, e.g. ethanol solubility, is necessary for better application performance of CDs. In addition, thanks to their low toxicity, both CDs were suitable for cellular labelling on HepG2 cells. (C) 2018 Elsevier B.V. All rights reserved.