Dansyl-modified carbon dots with dual-emission for pH sensing, Fe3+ion detection and fluorescent ink

被引：17

作者：

Tian, Hua ^{[1
]}

Dai, Yongcheng ^{[1
]}

Fu, Wenzhe ^{[1
]}

Liu, Haifang ^{[2
]}

Li, Mengting ^{[1
]}

Lv, Meiyuan ^{[1
]}

Yin, Xueqiong ^{[1
]}

机构：

[1] Hainan Univ, Sch Chem Engn & Technol, Hainan Prov Fine Chem Engn Res Ctr, 58th Renmin Rd, Haikou 570228, Hainan, Peoples R China

[2] Cent South Univ, Haikou Municipal People Hosp, Xiangya Sch Med, Affiliated Haikou Hosp,Cent Lab, Haikou 570208, Hainan, Peoples R China

来源：

RSC ADVANCES | 2020年 / 10卷 / 61期

基金：

美国国家科学基金会;

关键词：

ONE-STEP SYNTHESIS; QUANTUM DOTS; SELECTIVE DETECTION; HIGHLY EFFICIENT; GREEN SYNTHESIS; IRON IONS; ACID-RAIN; SENSOR; PROBE; NANOPARTICLES;

D O I：

10.1039/d0ra06097f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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(3+)ions. A good linear relationship for the Fe(3+)ion detection was obtained in the range from 0 mu M to 100 mu M, with a detection limit of 1.23 mu M. 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.

引用

页码：36971 / 36979

页数：9

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