Unique Approach To Develop Carbon Dot-Based Nanohybrid Near-Infrared Ratiometric Fluorescent Sensor for the Detection of Mercury Ions
Unique Approach To Develop Carbon Dot-Based Nanohybrid Near-Infrared Ratiometric Fluorescent Sensor for the Detection of Mercury Ions
复制标题
开发用于检测汞离子的碳点纳米混合近红外比率荧光传感器的独特方法
DOI：
10.1021/acs.analchem.7b01443
复制
发表时间：
2017-08-01
影响因子：
7.4
通讯作者：
Zhao, Shulin
中科院分区：
文献类型：
--
作者：
Zhao, Jingjin;Huang, Mengjiao;Zhao, Shulin
比率荧光分析由于可以消除外界影响而引起人们的广泛关注。在这项工作中，通过溶剂热处理玉米苞片的独特方法简单地制备了基于碳点（CD）的纳米杂化双发射系统，并将其用作Hg2+检测的比率荧光传感器。在单次激发下，所获得的纳米混合传感器在470 nm和678 nm附近有两个发射带，这可能分别源于CDs和叶绿素衍生卟啉的固有结构。当Hg2+存在时，678 nm处的荧光会被显着猝灭，而470 nm处的荧光强度仅略有改变。 470和678 nm处的荧光强度比在Hg2+浓度0~40 μM范围内表现出良好的线性关系，检测限约为9.0 nM。它在血清和河水样品中也具有令人满意的检测性能。这里制备的基于CD的纳米混合传感器可能在生物医学研究、环境保护和食品安全方面具有进一步的潜在应用。
The ratiometric fluorescence assay, which can eliminate the external effects, has attracted great attention. In this work, a carbon dot (CD)-based nanohybrid dual-emission system was simply prepared by a unique approach of solvothermal treating corn bract and used as a ratiometric fluorescent sensor for Hg2+ detection. Under a single excitation, the obtained nanohybrid sensor had two emission bands around 470 and 678 nm, which may originate from the intrinsic structure of CDs and chlorophyll-derived porphyrins, respectively. In the presence of Hg2+, the fluorescence at 678 nm could be remarkably quenched, while the fluorescence intensity at 470 nm was only slightly altered. The fluorescence intensity ratio at 470 and 678 nm exhibited a good linear relationship in the Hg2+ concentration range from 0 to 40 mu M with a detection limit of about 9.0 nM. It also had a satisfying assay performance in serum and river water samples. The prepared CD-based nanohybrid sensor here may hold the further potential applications in biomedicine study, environmental protection, and food safety.