Tan Libin, Yang Qiaomei, Peng Longpeng, Xie Can, Luo Kun, Zhou Liyi
College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China.
College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China.
J Hazard Mater. 2022 Aug 5;435:128947. doi: 10.1016/j.jhazmat.2022.128947. Epub 2022 Apr 22.
Sulfur dioxide (SO) and nitric oxide (NO), known as sulfur oxides and nitrogen oxides, are toxic air pollutants and seriously threaten human health. Herein, for the first time, a robust dual-response fluorescent sensor CGT with two different emission fluorophores and dual well-known response-group for visual bisulphites (HSO) and nitrites (NO) detection was reported. Specifically, once CGT was incubated with HSO firstly, the color of the test solution changed to dark yellow with no-fluorescence emission, following added NO, the color of the test solution changed to yellow with a bright cyan emission. However, NO was added firstly, the color of the test solution changed to dark purple with a white emission, and then added HSO, the color of the test solution changed to yellow with a bright cyan emission. Furthermore, CGT showed high sensitivity and selectivity toward HSO and NO detecting with good detection limits as low as 20.17 nM and 4.14 nM, respectively. Impressively, CGT showed good detection capability in complex aqueous samples and was successfully used for the detection of HSO and NO in biosystems. Thus, the experimental results indicated CGT as a powerful novel visual detecting tool for HSO and NO detecting in complex acid rain and biosystems.
二氧化硫（SO）和一氧化氮（NO），即硫氧化物和氮氧化物，是有毒空气污染物，严重威胁人类健康。在此，首次报道了一种强大的双响应荧光传感器CGT，它具有两种不同的发射荧光团和双众所周知的响应基团，用于可视化检测亚硫酸氢盐（HSO）和亚硝酸盐（NO）。具体而言，一旦CGT首先与HSO孵育，测试溶液的颜色变为深黄色且无荧光发射，随后加入NO，测试溶液的颜色变为黄色并伴有明亮的青色发射。然而，若首先加入NO，测试溶液的颜色变为深紫色并伴有白色发射，然后加入HSO，测试溶液的颜色变为黄色并伴有明亮的青色发射。此外，CGT对HSO和NO的检测表现出高灵敏度和选择性，检测限低至20.17 nM和4.14 nM。令人印象深刻的是，CGT在复杂水样中表现出良好的检测能力，并成功用于生物系统中HSO和NO的检测。因此，实验结果表明CGT是一种用于在复杂酸雨和生物系统中检测HSO和NO的强大新型可视化检测工具。
