Tian Hua, Dai Yongcheng, Fu Wenzhe, Liu Haifang, Li Mengting, Lv Meiyuan, Yin Xueqiong
Hainan Provincial Fine Chemical Engineering Research Center, School of Chemical Engineering and Technology, Hainan University 58th Renmin Road Haikou Hainan 570228 P. R. China
Central Laboratory, Affiliated Haikou Hospital Xiangya School of Medicine, Central South University (Haikou Municipal People Hospital) Haikou Hainan 570208 P. R. China.
RSC Adv. 2020 Oct 7;10(61):36971-36979. doi: 10.1039/d0ra06097f.
In this work, a multifunctional ratiometric fluorescence (FL) nanohybrid (CSCDs@DC) was synthesized from chitosan based carbon dots (CSCDs) and dansyl chloride (DC) at room temperature. The CSCDs@DC revealed strong FL intensity, great stability and excellent anti-photobleaching properties. Herein, CSCDs@DC was responsive to pH value in the range of 1.5-4.0 and exhibited color-switchable FL properties between acidic and alkaline environments. In addition, CSCDs@DC showed good selectivity and sensitivity towards Fe ions. A good linear relationship for the Fe ion detection was obtained in the range from 0 μM to 100 μM, with a detection limit of 1.23 μM. What's more, CSCDs@DC can be used as a fluorescent ink. It expressed superior optical properties after 3 months of storage or continuous exposure to UV light for 24 h. This study suggested that CSCDs@DC had potential in the detection of pH and metal ions, as well as showing promising application in the anti-counterfeiting field.
在本研究中，通过壳聚糖基碳点（CSCDs）与丹磺酰氯（DC）在室温下合成了一种多功能比率荧光（FL）纳米杂化物（CSCDs@DC）。CSCDs@DC表现出强烈的荧光强度、良好的稳定性和出色的抗光漂白性能。在此，CSCDs@DC对1.5至4.0范围内的pH值有响应，并在酸性和碱性环境之间表现出颜色可切换的荧光特性。此外，CSCDs@DC对铁离子显示出良好的选择性和灵敏度。在0 μM至100 μM范围内获得了铁离子检测的良好线性关系，检测限为1.23 μM。更重要的是，CSCDs@DC可用作荧光墨水。在储存3个月或连续暴露于紫外光24小时后，它表现出优异的光学性能。该研究表明，CSCDs@DC在pH和金属离子检测方面具有潜力，并且在防伪领域显示出有前景的应用。
