A simple fluorescent probe for detection of Ag+ and Cd2+ and its Cd2+ complex for sequential recognition of S2−. Issue 31 (14th May 2020)

• Record Type: Journal Article
• Authors: Li, Shengling; Cao, Duanlin; Ma, Wenbing; Hu, Zhiyong; Meng, Xianjiao; Li, Zhichun; Yuan, Changchun; Zhou, Tao; Han, Xinghua
• Is Part Of: RSC advances. Volume 10:Issue 31(2020)
• Page Start: 18434
• Page End: 18439
• Publication Date: 2020-05-14
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra01768j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A fluorescent probe for detection of Ag + and Cd 2+ and its Cd 2+ complex for sequential recognition of S 2− . Abstract : In this study, we designed and synthesized a simple probe 2-(8-((8-methoxyquinolin-2-yl)methoxy)quinolin-2-yl)benzo[ d ]thiazole (DQT ) for detection of Ag + and Cd 2+ in a CH3 OH/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 2+ with low detection limits of 0.42 μM and 0.26 μM, respectively. Importantly, the complexation of the probe with Cd 2+ resulted in a red shift from blue to green, making it possible to detect Ag + and Cd 2+ by the naked eye under an ultraviolet lamp. The DQT -Cd 2+ complex could be used for sequential recognition of S 2− . The recovery response could be repeated 3 times by alternate addition of Cd 2+ and S 2− . A filter paper strip test further demonstrated the potential of probe DQT as a convenient and rapid assay.