title: Single-fluorophore-based fluorescent probes enable dual-channel detection of Ag⁺ and Hg²⁺ with high selectivity and sensitivity.
abstract: A new type of fluorescent probe capable of detecting Ag(+) and Hg(2+) in two independent channels was developed in the present work. Specifically, in CH3CN-MOPS mixed solvents with CH3CN/MOPS ratio (v/v) of 15/85, this type of probe fluoresced weakly, and the addition of Ag(+) remarkably induced fluorescence enhancement of the probe. In CH3CN-MOPS mixed solvents with the percentage of CH3CN increased up to 65%, the probe was highly fluorescent and addition of Hg(2+) dramatically induced the fluorescence quenching. Thus, using such single-fluorophore-based probe and tuning the polarity of the mixed solvent, Ag(+), and Hg(2+) can be detected in independent channels with high selectivity and sensitivity. As a result, the mutual interference usually encountered in most cases of Ag(+) and Hg(2+) sensing owing to the similar fluorescence response that these two ions induced, can be effectively circumvented by using the probes developed herein.
authors: School of Chemistry & Chemical Engineering, University of Chinese Academy of Sciences (UCAS), Beijing 100049, China.
authors: Yanlin
authors: Y
authors: Lv
authors: Department of Chemistry, Renmin University of China, Beijing 100872, China.
authors: Lili
authors: L
authors: Zhu
authors: School of Chemistry & Chemical Engineering, University of Chinese Academy of Sciences (UCAS), Beijing 100049, China.
authors: Heng
authors: H
authors: Liu
authors: Beijing National Laboratory for Molecular Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, and Key Laboratory for Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: yswu@iccas.ac.cn.
authors: Yishi
authors: Y
authors: Wu
authors: Department of Chemistry, Renmin University of China, Beijing 100872, China. Electronic address: zilichen@ruc.edu.cn.
authors: Zili
authors: Z
authors: Chen
authors: Beijing National Laboratory for Molecular Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, and Key Laboratory for Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors: Hongbing
authors: H
authors: Fu
authors: School of Chemistry & Chemical Engineering, University of Chinese Academy of Sciences (UCAS), Beijing 100049, China. Electronic address: zytian@ucas.ac.cn.
authors: Zhiyuan
authors: Z
authors: Tian
mesh_terms: D005456:Fluorescent Dyes / Q000737:chemistry*; D057230:Limit of Detection; D009682:Magnetic Resonance Spectroscopy; D008628:Mercury / Q000032:analysis*; D012834:Silver / Q000032:analysis*; D013050:Spectrometry, Fluorescence
chemical_list: D005456:Fluorescent Dyes; D012834:Silver; D008628:Mercury
keywords: Dual-channel detection; Fluorescent probe; Mercury ions; Silver ions