一种用于检测银和镉的简单荧光探针及其用于顺序识别硫的镉配合物。
A simple fluorescent probe for detection of Ag and Cd and its Cd complex for sequential recognition of S.
作者信息
Li Shengling, Cao Duanlin, Ma Wenbing, Hu Zhiyong, Meng Xianjiao, Li Zhichun, Yuan Changchun, Zhou Tao, Han Xinghua
机构信息
School of Chemical Engineering and Technology, North University of China Taiyuan 030051 P.R. China
National Demonstration Center for Experimental Comprehenisve Chemical Engineering Education, North University of China Taiyuan 030051 P.R. China.
出版信息
RSC Adv. 2020 May 14;10(31):18434-18439. doi: 10.1039/d0ra01768j. eCollection 2020 May 10.
In this study, we designed and synthesized a simple probe 2-(8-((8-methoxyquinolin-2-yl)methoxy)quinolin-2-yl)benzo[]thiazole (DQT) for detection of Ag and Cd in a CHOH/HEPES (9 : 1 v/v, pH = 7.30) buffer system. Its structure was characterized by NMR, ESI-HR-MS and DFT calculations, and its fluorescence performance was also investigated. Probe DQT showed fluorescence quenching in response to Ag and Cd with low detection limits of 0.42 μM and 0.26 μM, respectively. Importantly, the complexation of the probe with Cd resulted in a red shift from blue to green, making it possible to detect Ag and Cd by the naked eye under an ultraviolet lamp. The DQT-Cd complex could be used for sequential recognition of S. The recovery response could be repeated 3 times by alternate addition of Cd and S. A filter paper strip test further demonstrated the potential of probe DQT as a convenient and rapid assay.
在本研究中，我们设计并合成了一种简单的探针2-(8-((8-甲氧基喹啉-2-基)甲氧基)喹啉-2-基)苯并噻唑（DQT），用于在CHOH/HEPES（9 : 1 v/v，pH = 7.30）缓冲体系中检测银和镉。通过核磁共振（NMR）、电喷雾电离高分辨质谱（ESI-HR-MS）和密度泛函理论（DFT）计算对其结构进行了表征，并对其荧光性能进行了研究。探针DQT对银和镉表现出荧光猝灭，检测限分别低至0.42 μM和0.26 μM。重要的是，该探针与镉的络合导致从蓝色到绿色的红移，使得在紫外灯下肉眼能够检测银和镉。DQT-镉络合物可用于对硫的顺序识别。通过交替添加镉和硫，回收响应可重复3次。滤纸纸条测试进一步证明了探针DQT作为一种便捷快速检测方法的潜力。
Zotero 插件